Accelerator Mass Spectrometry and Isotope Research (FWIR)

---

"Impatient" scientists: Accelerator mass spectrometry (AMS)
for the determination of long-lived radionuclides

---

Introduction

In autumn 2011 the Ion Beam Center of HZDR has expanded its measurement capability by another highly-sensitive analytical method, accelerator mass spectrometry (AMS), which is used for the determination of long-lived radionuclides.

In contrast to ordinary decay counting, the "impatient" scientists do not wait for the disintegration of a radioactive nucleus. In fact, they determine the not-yet-decayed radionuclides by mass spectrometry, which is much more efficient.

There is a main advantage of using a high-energy accelerator for mass spectrometry: The background and interfering signals, resulting from molecular ions and ions with similar masses e.g. isobars, are nearly completely eliminated. Thus, AMS generally provides much lower detection limits in comparison to conventional mass spectrometry. Our AMS system offers excellent measurement capabilities also for external users.

In contrary to common low-energy AMS facilities in Germany and Europe, which have mainly specialized in radiocarbon analyses (¹⁴C), the HZDR-AMS was the first modern-type facility in the EU that runs at a terminal voltage of 6 MV. Maximum stability is guaranteed by producing the high-voltage of the accelerator by a high-frequency cascade generator.

The benefits from using AMS for radiation protection, nuclear safety, nuclear waste, radioecology, phytology, nutrition, toxicology, and pharmacology research are obvious and manifold: Smaller sample sizes, easier and faster sample preparation, higher sample throughput and the redundancy for radiochemistry laboratories will largely reduce costs. Lower detection limits widen applications to shorter and longer time-scales and to sample types that could never be investigated before. Especially in environmental and geosciences, the determination of long-lived cosmogenic radionuclides like 10Be, 26Al, and 36Cl became more and more important. Using these nuclides dating of suddenly occurring (pre-)historic mass movements, e.g. volcanic eruptions, rock avalanches, tsunamis, meteor impacts, earth quakes and glacier movements, is possible. Additionally, glacier movements and data from ice cores give hints for the reconstruction of historic climate changes and providing information for the validation of climate model predicting future changes. Field work advices with respect to a sampling strategy for geomorphological applications can be downloaded here: Please contact us for new projects before sampling.

---

Cosmogenic radionuclides At the moment, we are able to determine at DREAMS the long-lived cosmogenic radionuclides listed in the table. AMS-measurements of other radionuclides, e.g. 44Ti, and stable nuclides (by so-called Super-SIMS) are under development. We are capable of measuring isotopic ratios (radioactive/stable) as low as 10-16.

nuclide half-life 7Be 53.22 days 10Be 1.387 Ma 26Al 0.7 Ma 36Cl 0.301 Ma 41Ca 0.104 Ma 129I 15.7 Ma

---

Chemical sample preparation AMS measurements of long-lived radionuclides are only possible if samples are chemically treated, as the original samples (water, rocks etc.) that contain reasonable amounts of radionuclides are too big (100 g - 10 kg). Or in other words, the radionuclide concentrations in the range of sub-ppq are too low to allow an analysis of typical 1 mg-targets. Besides, the chemical separation is doing most of the work reducing the troublesome isobars, and eliminating possible contamination from other sources. For instance, the analysis of cosmogenic 10Be in quartz can only be performed if samples are previously cleaned from atmospherically-produced 10Be. The preparation of 10Be-, 26Al-, and 41Ca-AMS-targets needs the use of large quantities of hydrochloric acid (HCl) and, thus, should be preferably performed in a separated place than 36Cl- und 129I-AMS-target preparation keeping the risk of cross-contamination as low as possible. At DREAMS we have installed in autumn 2009 a dedicated lab for 36Cl and 129I sample preparation.

---

Machine layout

Ions are extracted from two identical hybrid ion sources, which can handle gaseous and solid samples. Each Cs-sputter source is equipped with a 200-sample wheel. On the low-energy (LE) side the ions are separated by an energy-analyser, a 54° electrostatic deflector, and a mass-analyzer, a 90° magnet, equipped with a fast-bouncing system. The tandetron accelerator [Gottdang et al., 2002] contains a gas stripper and active stripper gas regulation. On the high-energy (HE) side, a 90° analysing magnet is followed by a Faraday-Cup for stable isotope measurements. The rare isotopes are detected by a 4-anode gas ionization chamber, after passing a 35° electrostatic deflector and a 30° vertical analysing magnet for further background reduction. For ¹⁰Be and ³⁶Cl measurements a silicon nitride absorber foil (1 µm) can be inserted in the HE-part for post-stripping [Klein et al., 2008].

Mode of operation of DREAMS (external link to YouTube)

---

Access for external users Of course, we are performing AMS measurements also for external users. For scientific purposes you can apply for beamtime. Detailed instructions about the procedure are given in "How to get AMS data from DREAMS for external users". After positive evaluation by an (external) committee, you will get free beamtime at DREAMS for your samples. Before starting to write a proposal, please contact us for further information. An overview of all ion beam methods (modification and analytics) and add-on-services can be found in the "Ion Beam Centre Flyer". Page 7 contains the AMS part. If you want to perform AMS sample preparation in your own lab, please contact us at the latest BEFORE pressing BeO, Al2O3 etc. in target holders finding out DREAMS specifications such as the best compound-metal mixing ratio (BeO:Nb, 1:4; Al2O3:Ag, 1:1; CaF2:Ag, 1:4., Rugel et al. 2013), nomenclature, labelling of cathodes and containers. Additionally, we offer "in-house-training" for AMS sample preparation in our chemistry labs at HZDR, which are already functional since 2009. Unique in Germany, is the possibility to prepare 36Cl- and 129I-samples in a Cl- and S-free lab environment (see also above). If you are interested in setting up your own sample preparation labs, please do not hesitate to contact us for our mentoring programme.
Christof Sager, TU Berlin	Felix Stäger, U Hannover	Anica Weller, U Hannover	Pilar Jeanneret IANIGLA - CONICET, Mendoza (AR)
Konstanze Stübner, U Potsdam	Zsófia Ruszkiczay-Rüdiger, Research Centre for Astronomy & Earth Sciences Budapest (HU)	Patricia Rauh, U Jena	Anna Wypukol, FU Berlin & Alfred Wegener Institute Potsdam
Tom Kieck, U Mainz	Amélie Chabilan, TU Dresden	Carlos Rossi, Complutense University, Madrid (E)	Katharina Stock, Gymnasium Bedburg & Collin Tiessen, U Ottawa (CAN)
Rebecca Querfeld, U Hannover	Carolin Zorn, GFZ Potsdam	Sebastian Gehring, U Innsbruck (A)	Tina Köhler, Alfred Wegener Institute Potsdam
Sébastien Pivot U Aix-Marseille III (F)	Michal Šujan, Comenius U Bratislava (SK)	Oliver Forstner, Helmholtz Institute Jena	Spyros-Christos Olivotos, GFZ Potsdam
Anne-Sophie Meriaux, U Newcastle (UK)	Lisa Luna, U Potsdam	Ezequiel Garcia Morabito, U Bern (CH)	Andreas Gärtner, Senckenberg Dresden
Luisa von Albedyll, Alfred Wegener Institute Potsdam	Lars Zipf, U Heidelberg	Jane Lund Andersen, U Aarhus (DK)	Elisa Pernak, TUBA Freiberg
Swenja Rosenwinkel, U Potsdam	Tomas Stor, Charles University, Prag (CZ)	Michaela Fröhlich (nee Srncik), Australian National University (AUS)	Darío Rodrigues, TANDAR, Buenos Aires (AR)
Marie Kanstrup, U Aarhus (DK)	Thomas Smith, U Bern (CH)	Cornelia Wilske, UFZ Halle	Vasila Sulaymonova, TUBA Freiberg
Guillem Domènech i Surinyach, U Politècnica de Catalunya (E)	Lisa Michel & Rebecca Schmidt, TU Dresden	Angela Landgraf, U Potsdam	Peter Ludwig, TU Munich
Jenny Feige, VERA, U Vienna (A)	Anna Seither, TUBA Freiberg	Aurore Hutzler, CEREGE, Aix-en-Provence (F)	Ines Röhringer, U Bayreuth
Cengiz Yilderim, U & GFZ Potsdam	Maggi Fuchs & Katja Klemm, TUBA Freiberg	Bernhard Kuczeweski, U Cologne	Christoff Andermann, TUBA Freiberg & U Rennes (F)

See the last steps of ¹⁰Be-, ²⁶Al-, ⁴¹Ca-target preparation for AMS measurements @ DREAMS (Power-Point-/Movie-Animation; 137 MB!!!):

Visiting DREAMS to learn more about it

We are proud of DREAMS and our work! We love to explain how and why! Please contact us to schedule your visit!

The picture shows students from TU Berlin, Lecture "Nuclear astrophysics", with Jenny Feige (TUB) and Georg Rugel (HZDR) in front of the DREAMS accelerator tank.

Important information on next AMS beam times for external users (updated copy from www.hzdr.de/ibc):

"We would like to inform you that the routine user operation of accelerator mass spectrometry (AMS) at the Ion Beam Center (IBC) is suspended from Nov 15, 2018 to Dec 31, 2019. This temporary in­ter­ruption is due to the formation of a dedicated division “Accelerator Mass Spectrometry and Isotope Research” at the HZDR / In­stitute of Beam Physics and Materials Research, the extension of the personnel basis of the AMS group and the im­ple­mentation of technical enhancements at the DREAMS facility.

Accordingly, the submission of new AMS proposals at the IBC is not possible at a mo­ment. With respect to already running or accep­ted proposals we will contact you to discuss individual solutions. For further information please contact our AMS group, or send a mes­sa­ge to ibc@hzdr.de.

As an alternative we refer to the possibility to apply for AMS beam time within the European Infra­structure Project “RADIATE”, which provides transnational user access to major ion beam facilities across Europe. Submission of proposals has started in April 2019. Further infor­ma­tion will be available soon, we keep you informed.

We hope that we can re-open submission for new AMS proposals at IBC in September 2019.

Thank you for your understanding and sorry for any inconvenience."

---

References

G. Rugel, S. Pavetich, S. Akhmadaliev, S.M. Enamorado Baez, A. Scharf, R. Ziegenrücker, S. Merchel, The first four years of the AMS-facility DREAMS: Status and developments for more accurate radionuclide data, Nucl. Instr. and Meth. in Phys. Res. B 370 (2016) 94-100.

S. Akhmadaliev, R. Heller, D. Hanf, G. Rugel, S. Merchel, The new 6 MV AMS-facility DREAMS at Dresden, Nucl. Instr. and Meth. in Phys. Res. B 294 (2013) 5-10.

S. Merchel, S. Akhmadaliev, S. Pavetich, G. Rugel, Ungeduldige Forscher träumen mit DREAMS - Bestimmung langlebiger Radionuklide mit Beschleunigermassenspektrometrie, GIT Labor-Fachzeitschrift 56 (2012) 88-90.

---

Useful links

Animation of the SIRIUS tandem accelerator (ANSTO, Australia)

Video about ¹⁴C-dating @ GNS, New Zealand (in English)

Animation about ¹⁴C AMS @ ANSTO, Austrailia (in English)

Talk about "Accelerator Mass Spectrometry in Biology and Health Care" (Science on Saturday, LLNL, USA, in English)

Video about ²⁶Al/¹⁰Be-dating of the "Peking Man" @ PRIME Lab, USA (in English)

Cosmogenic nuclides in meteorites and AMS for "German dummies" (in German)

Further information "Cosmic radiation" und "Cosmogenic nuclides" (in German)

---

Please contact Silke Merchel for further information or have a look at the following papers:

Further reading particularly with respect to terrestrial produced cosmogenic radionuclides

• Reviews

P. R. Bierman, Rock to sediment – slope to sea with ¹⁰Be – rates of landscape change, Ann. Rev. Earth Planet. Sci. 32 (2004) 215-225.

T. E. Cerling, H. Craig. Geomorphology & in-situ cosmogenic isotopes, Ann. Rev. Earth Planet. Sci. 22 (1994) 273-317.

R. Golser, W. Kutschera, Twenty Years of VERA: Toward a Universal Facility for Accelerator Mass Spectrometry, Nuclear Physics News 27 (2017)
29-34.

J. C. Gosse, F. M. Phillips, Terrestrial in situ cosmogenic nuclides: theory and application, Quaternary Science Review 20 (2001) 1475-1560.

S. Ivy-Ochs, M. Schaller, Examining Processes and Rates of Landscape Change with Cosmogenic Radionuclides, In: Radioactivity in the Environment, Chapter 6, 16 (2009) 231-294.

W. Kutschera, Progress in isotope analysis at ultra-trace level by AMS, International Journal of Mass Spectrometry 242 (2005) 145-160.

W. Kutschera, Accelerator mass spectrometry: state of the art and perspectives, Advances in Physics: X 1 (2016) 570-595.

A. E. Litherland, X-L. Zhao, W. E. Kieser, Mass spectrometry with accelerators, Mass Spectrometry Reviews 30 (2011) 1037-1072.

P. Muzikar, D. Elmore, D.E. Granger, Accelerator mass spectrometry in geologic research, GSA Bulletin 115 (2003) 643-654.

• Chemical separation: ¹⁰Be und ²⁶Al

E. T. Brown, J. M. Edmond, G. M. Raisbeck, F. Yiou, M. D. Kurz, E. J. Brook, Examination of surface exposure ages of Antarctic moraines using in-situ produced ¹⁰Be and ²⁶Al, Geochim. Cosmochim. Acta 55 (1991) 2269-2283.

R. G. Ditchburn. N. E. Whitehead, The separation of ¹⁰Be from silicates, 3^rd Workshop of the South Pacific Environmental Radioactivity Association (1994) 4-7. / expanded description on http://depts.washington.edu/cosmolab/chem.shtml

C. P. Kohl, K. Nishiizumi, Chemical isolation of quartz for measurement of in-situ-produced cosmogenic nuclides, Geochim. Cosmochim. Acta 56 (1992) 3583-3587.

S. Merchel, U. Herpers, An Update on Radiochemical Separation Techniques for the Determination of Long-Lived Radionuclides via Accelerator Mass Spectrometry, Radiochim. Acta 84 (1999) 215-219.

V.A. Sulaymonova, M.C. Fuchs, R. Gloaguen, R. Möckel, S. Merchel, M. Rudolph, M.R. Krbetschek, Feldspar flotation as a quartz-purification method in cosmogenic nuclide dating: A case study of fluvial sediments from the Pamir, MethodsX 5 (2018) 717-726.

• Chemical separation: ³⁶Cl

S. Jiang, Y. Lin, H. Zhang, Improvement of the sample preparation method for AMS measurement of ³⁶Cl in natural environment, Nucl. Instr. and Meth. in Phys. Res. B223-224 (2004) 318-322.

S. Merchel, U. Herpers, An Update on Radiochemical Separation Techniques for the Determination of Long-Lived Radionuclides via Accelerator Mass Spectrometry, Radiochim. Acta 84 (1999) 215-219.

S. Merchel, R. Braucher, V. Alfimov, M. Bichler, D.L. Bourlès, J.M. Reitner, The potential of historic rock avalanches and man-made structures as chlorine-36 production rate calibration sites, Quat. Geochron. 18 (2013) 54-62.

J. O. Stone, G. L. Allan, L. K. Fifield, R. G. Cresswell, Cosmogenic chlorine-36 from calcium spallation, Geochim. Cosmochim. Acta 60 (1996) 679-692. / expanded description on http://depts.washington.edu/cosmolab/chem.shtml

• Accelerator mass spectrometry

R. C. Finkel, M. Suter, AMS in the Earth Sciences: Technique and Applications, Advances in Analytical Geochemistry 1 (1993) 1-114.

S. Merchel, M. Arnold, G. Aumaître, L. Benedetti, D. L. Bourlès, R. Braucher, V. Alfimov, S. P. H. T. Freeman, P. Steier, A. Wallner, Towards more precise ¹⁰Be and ³⁶Cl data from measurements at the 10^-14 level: Influence of sample preparation, Nucl. Instr. and Meth. in Phys. Res. B266 (2008) 4921-4926.

C. Tuniz, J. R. Bird, D. Fink, G. F. Herzog, Accelerator Mass Spectrometry, CRC Press (1998).

• Production rates

J.M. Licciardi, C.L. Denoncourt, R.C. Finkel, Cosmogenic ³⁶Cl production rates from Ca spallation in Iceland, Earth Planet. Sci. Lett. 267 (2008) 365-377.

J. Masarik, K. J. Kim, R. C. Reedy, Numerical simulation of in situ production of terrestrial cosmogenic nuclides, Nucl. Instr. and Meth. in Phys. Res. B259 (2007) 642-645.

K. Nishiizumi, E. L. Winterer, C. P. Kohl, J. Klein, R. Middleton, D. Lal, J. R. Arnold, Cosmic ray production rates of ¹⁰Be and ²⁶Al in quartz from glacially polished rocks, J. Geophys. Res. 94 (1989) 17907-17915.

F. M. Phillips, W. D. Stone, J. T. Fabryka-Martin, An improved approach to calculating low-energy cosmic-ray neutron fluxes near the land/atmosphere interface, Chemical Geology 175 (2001) 689-701.

I. Schimmelpfennig, Sources of in-situ ³⁶Cl in basaltic rocks. Implications for calibration of production rates, Quaternary Geochronology 4 (2009) 441-461.

J. O. Stone, G. L. Allan, L. K. Fifield, R. G. Cresswell, Cosmogenic chlorine-36 from calcium spallation, Geochim. Cosmochim. Acta 60 (1996) 679-692.

J. O. H. Stone, J. M. Evans, L. K. Fifield, G. L. Allan, R. G. Cresswell, Cosmogenic chlorine-36 production in calcite from muons, Geochim. Cosmochim. Acta 62 (1998) 433-454.

• Scaling factors

D. Desilets, M. Zreda, Spatial and temporal distribution of secondary cosmic-ray nucleon intensities and applications to in situ cosmogenic dating, Earth Planet. Sci. Lett. 206 (2003) 21-42.

T. J. Dunai, Scaling factors for production rates of in situ produced cosmogenic nuclides: a critical re-evaluation, Earth Planet. Sci. Lett. 176 (2000) 157-169. See also comments by Desilets et al. 188 (2001) 283-287 and reply by Dunai 188 (2001) 289-298.

T. J. Dunai, Influence of secular variation of the geomagnetic field on production rates of in situ produced cosmogenic nuclides, Earth Planet. Sci. Lett. 193 (2001) 197-212.

D. Lal, Cosmic ray labeling of erosion surfaces: in situ nuclide production rates and erosion models, Earth Planet. Sci. Lett. 104 (1991) 424-439.

J. Masarik, M. Frank, J. M. Schäfer, R. Wieler, Correction of in situ cosmogenic nuclide production rates for geomagnetic field intensity variation during the past 800,000 years, Geochim. Cosmochim. Acta 65 (2001) 2995-3003.

N. A. Lifton, J. W. Bieber, J. M. Clem, M. L. Duldig, P. Evenson, J. E. Humble, R. Pyle, Addressing solar modulation and long-term uncertainties in scaling secondary cosmic rays for in situ cosmogenic nuclide applications, Earth Planet. Sci. Lett. 239 (2005) 140-161.

N. Lifton, D. F. Smart, M. A. Shea, Scaling time-integrated in situ cosmogenic nuclide production rates using a continuous geomagnetic model, Earth Planet. Sci. Lett. 268 (2008) 190-201.

J. S. Pigati, N. A. Lifton, Geomagnetic effects on time-integrated cosmogenic nuclide production with emphasis on in situ ¹⁴C and ¹⁰Be, Earth Planet. Sci. Lett. 226 (2004) 193-205.

J. O. Stone, Air pressure and cosmogenic isotope production, J. Geophys. Res. 105 (2000) 23753-23759.

• Dating of groundwater

IAEA - Isotope methods for dating old groundwater, Vienna: International Atomic Energy Agency, 2013, ISBN 978–92–0–137210–9, 379 pages.

J.A. Corcho Alvarado, R. Purtschert, K. Hinsby, L. Troldborg, M. Hofer, R. Kipfer, W. Aeschbach-Hertig, H. Arno-Synal, ³⁶Cl in modern groundwater dated by a multi-tracer approach (³H/³He, SF₆, CFC-12 and ⁸⁵Kr): a case study in quaternary sand aquifers in the Odense Pilot River Basin, Denmark, Applied Geochemistry 20 (2005) 599-609.

S. N. Davis, S. Moysey, L. DeWayne Cecil, M. Zreda, Chlorine-36 in groundwater of the United States: empirical data, Hydrogeology Journal 11 (2003) 217-227.

V. Lavastre, C. Le Gal La Salle, J. L. Michelot, S. Giannesini, L. Benedetti, J. Lancelot, B..Lavielle, M. Massault, B. Thomas, E. Gilabert, D. Bourlès, N. Clauer, P. Agrinier, Establishing constraints on groundwater ages with ³⁶Cl, ¹⁴C, ³H, and noble gases: A case study in the eastern Paris basin, France, Applied Geochemistry 25 (2010) 123-142 (and erratum).

M.J. Lenahan, D.M. Kirste, D.C. McPhail, L.K. Fifield, Cl^- AND ³⁶Cl DISTRIBUTION IN A SALINE AQUIFER SYSTEM: CENTRAL NEW SOUTH WALES, AUSTRALIA, In: Roach I.C. ed. 2005. Regolith 2005 – Ten Years of CRC LEME. CRC LEME (2005) 187-190.

C. Münsterer, J. Fohlmeister, M. Christl, A. Schröder-Ritzrau, V. Alfimov, S. Ivy-Ochs, A. Wackerbarth, A. Mangini, Cosmogenic ³⁶Cl in karst waters from Bunker Cave North Western Germany – A tool to derive local evapotranspiration?, Geochim. Cosmochim. Acta 86 (2012) 138-149.

E. Nolte, P. Krauthan, G. Korschinek, P. Maloszewski, P. Fritz, M. Wolf, Measurements and interpretations of ³⁶Cl in groundwater, Milk River aquifer, Alberta, Canada, Applied Geochemistry 6 (1991) 435-445.

J. Park, C.M. Bethke, T. Torgersen, T.M. Johnson, Transport modeling applied to the interpretation of groundwater ³⁶Cl age, WATER RESOURCES RESEARCH 38 (2002) 1043.

---

• House advertising - some of our latest publications ;-)

2018

G. Domènech, J. Corominas, O. Mavrouli, S. Merchel, A. Abellán, S. Pavetich, G. Rugel, Calculation of the rockwall recession rate of a limestone cliff, affected by rockfalls, using cosmogenic chlorine-36. Case study of the Montsec Range (Eastern Pyrenees, Spain), Geomorphology 306 (2018) 325-335.

J. Feige, A. Wallner, L.K. Field, R. Golser, S. Merchel, G. Rugel, P. Steier, S.G. Tims, S.R. Winkler, Limits on supernova-associated 60Fe/ 26Al nucleosynthesis ratios from mass spectrometry measurements of deep-sea sediments, accepted for publication in Phys. Rev. Lett. (2018).

L.V. Luna, B. Bookhagen, S. Niedermann, G. Rugel, A. Scharf, S. Merchel, Glacial chronology and production rate cross-calibration of five cosmogenic nuclide and mineral systems from the southern Central Andean Plateau, Earth and Planetary Science Letters 500 (2018) 242-253.

S. Pavetich, A. Wallner, M. Martschini, S. Akhmadaliev, I Dillmann, K. Fifield, S. Haon, T. Heftrich, F. Käppeler, C. Lederer, S. Merchel, M. Paul, R. Reifarth, G. Rugel, P. Steier, M. Tessler, S. Tims, M. Weigand, L. Weissman, Accelerator mass spectrometry measurement of the reaction ³⁵Cl(n,γ)³⁶Cl at keV energies, accepted for publication in Phys. Rev. C (2018).

A. Stolle, W. Schwanghart, C. Andermann, A. Bernhardt, H. Wittmann, S. Merchel, G. Rugel, M. Fort, B.R. Adhikari, O. Korup, Protracted river recovery from medieval earthquakes, Earth Surface Processes and Landforms (2018) in print.

V.A. Sulaymonova, M.C. Fuchs, R. Gloaguen, R. Möckel, S. Merchel, M. Rudolph, M.R. Krbetschek, Feldspar flotation as a quartz-purification method in cosmogenic nuclide dating: A case study of fluvial sediments from the Pamir, MethodsX 5 (2018) 717-726.

L. Wüthrich, E. Garcia Morabito, J. Zech, M. Trauerstein, H. Veit, C. Gnägi, S. Merchel, A. Scharf, G. Rugel, M. Christl, R. Zech, ¹⁰Be surface exposure dating of the last deglaciation in the Aare Valley, Switzerland, Swiss Journal of Geosciences 111 (2018) 295-303.

2017

J. Feige, D. Breitschwerdt, A. Wallner, M.M. Schulreich, N. Kinoshita, M. Paul, C. Dettbarn, K.L. Fifield, R. Golser, M. Honda, U. Linnemann, H. Matsuzaki, S. Merchel, G. Rugel, P. Steier, S.G. Tims, S.R. Winkler, T. Yamagata, The Link Between the Local Bubble and Radioisotopic Signatures on Earth, Proc. 14th Int. Symp. on Nuclei in the Cosmos (NIC2016), JPS Conf. Proc. 14 (2017) 010304.

M. Legrand, S. Preunkert, R. Weller, L. Zipf, C. Elsässer, S. Merchel, G. Rugel, D. Wagenbach, Year-round record of bulk and size-segregated aerosol composition in central Antarctica (Concordia site) Part 2: Biogenic sulfur (sulfate and methanesulfonate) aerosol, Atmosph. Chem. Phys. 17 (2017) 14055-14073.

K.L. Linge, L.P. Bédard, R. Bugoi, J. Enzweiler, K.P. Jochum, R. Kilian, L. Jingao, J. Marin-Carbonne, S. Merchel, F. Munnik, L.F.G. Morales, C. Rollion-Bard, A.K. Souders, P.J. Sylvester, U. Weis, GGR Biennial Critical Review: Analytical Developments Since 2014, Geostandards and Geoanalytical Research 41 (2017) 493-562.

R. Querfeld, S. Merchel, G. Steinhauser, Low-cost production of a 7Be tracer from rainwater and purification: preliminary results, Journal of Radioanalytical and Nuclear Chemistry 314 (2017) 521-527.

S. Rosenwinkel, A. Landgraf, O. Korup, W. Schwanghart, F. Volkmer, A. Dzhumabaeva, S. Merchel, G. Rugel, F. Preusser, Late Pleistocene outburst floods from Issyk Kul, Kyrgyzstan?, Earth Surface Processes and Landforms 42 (2017) 1535-1548.

T. Smith, B.A. Hofmann, I. Leya, S. Merchel, S. Pavetich, G. Rugel, A. Scharf, The cosmic-ray exposure history of the Twannberg iron meteorite (IIG), Meteorit. Planet. Sci. 52 (2017) 2241-2257.

L. von Albedyll, T. Opel, D. Fritzsche, S. Merchel, T. Laepple, G. Rugel, ¹⁰Be in the Akademii Nauk ice core–first results for CE 1590‒1950 and future sampling strategy for validation of ice-core chronology, Journal of Glaciology 63 (2017) 514-522.

2016

A. Landgraf, A. Djumabaeva, K.E. Abdrakhmatov, M. Strecker, E.A. Macaulay, J.R. Arrowsmith, F. Preusser, H. Sudhaus, G. Rugel, S. Merchel, Repeated large-magnitude earthquakes in a tectonically active, low-strain continental interior: the northern Tien Shan, Kyrgyzstan, Journal of Geophysical Research: Solid Earth 121 (2016) 3888-3910.

P. Ludwig, S. Bishop, R. Egli, V. Chernenko, B. Deneva, T. Faestermann, N. Famulok, L. Fimiani, J.M. Gómez-Guzmán, K. Hain, G. Korschinek, M. Hanzlik, S. Merchel, G. Rugel, Time-Resolved Two Million Year Old Supernova Activity Discovered in the Earth's Microfossil Record, Proceedings of the National Academy of Sciences of the United States of America (PNAS) 113 (2016) 9232–9237.

Th. Müller, K. Osenbrueck, G. Strauch, S. Pavetich, K.-S. Al-Mashaikhi, C. Herb, S. Merchel, G. Rugel, W. Aeschbach, W. Sanford, Use of multiple age tracers to estimate groundwater residence times and long-term recharge rates in arid southern Oman, Applied Geochemistry 74 (2016) 67-83.

G. Rugel, S. Pavetich, S. Akhmadaliev, S.M. Enamorado Baez, A. Scharf, R. Ziegenrücker, S. Merchel, The first four years of the AMS-facility DREAMS: Status and developments for more accurate radionuclide data, Nucl. Instr. and Meth. in Phys. Res. B 370 (2016) 94-100.

W. Schwanghart, A. Bernhardt, A. Stolle, P. Hoelzmann, B.R. Adhikari, C. Andermann, P. Hölzmann, S. Tofelde, S. Merchel, G. Rugel, M. Fort, O. Korup, Repeated catastrophic valley infill following medieval earthquakes in the Nepal Himalaya, Science 351 (2016) 147-150.

A. Wallner, J. Feige, N. Kinoshita, M. Paul, L.K. Fifield, R. Golser, M. Honda, U. Linnemann, H. Matsuzaki, S. Merchel, G. Rugel, S. Tims, P. Steier, T. Yamagata, S.R. Winkler, Recent near-Earth supernovae probed by global deposition of interstellar radioactive ⁶⁰Fe, Nature 532 (2016) 69-72.

L. Zipf, S. Merchel, P. Bohleber, G. Rugel, A. Scharf, Exploring ice core drilling chips from a cold Alpine glacier for cosmogenic radionuclide (¹⁰Be) analysis, Results in Physics 6 (2016) 78-79.

2015

M.C. Fuchs, R. Gloaguen, S. Merchel, E. Pohl, V. A. Sulaymonova, C. Andermann, G. Rugel, Denudation rates across the Pamir based on ¹⁰Be concentrations in fluvial sediments: dominance of topographic over climatic factors, Earth Surf. Dynam. 3 (2015) 423-439.

M.C. Fuchs, R. Gloaguen, S. Merchel, E. Pohl, V.A. Sulaymonova, C. Andermann, G. Rugel, Millennial erosion rates across the Pamir based on ¹⁰Be concentrations in fluvial sediments: Dominance of topographic over climatic factors, Earth Surf. Dynam. Discuss. 3 (2015) 83-128.

2014

S. Merchel, I. Mrak, R. Braucher, L. Benedetti, B. Repe, D.L. Bourlès, J.M. Reitner, Surface exposure dating of the Veliki vrh rock avalanche in Slovenia associated with the 1348 earthquake, Quat. Geochron. 22 (2014) 33-42.

U. Ott, S. Merchel, S. Herrmann, S. Pavetich, G. Rugel, T. Faestermann, L. Fimiani, J.M. Gomez-Guzman, K. Hain, G. Korschinek, P. Ludwig, M. D’Orazio, L. Folco, Cosmic ray exposure and pre-atmospheric size of the Gebel Kamil iron meteorite, Meteorit. Planet. Sci. 49 (2014) 1365-1374.

S. Pavetich, S. Akhmadaliev, M. Arnold, G. Aumaître, D. Bourlès, J. Buchriegler, R. Golser, K. Keddadouche, M. Martschini, S. Merchel, G. Rugel, P. Steier, Interlaboratory study of the ion source memory effect in ³⁶Cl accelerator mass spectrometry, Nucl. Instr. and Meth. in Phys. Res. B 329 (2014) 22-29.

D. Rodrigues, G. Korschinek, S. Merchel, G. Rugel, A. Arazia, G. V. Martí, APLICACION DE LA TECNICA DE ESPECTROMETRIA DE MASAS CON ACELERADORES EN EL ESTUDIO DE LA DINAMICA DE SEDIMENTOS SUBMARINOS, ANALES AFA (Asociación Física Argentina) 25 (2014) 51-55.

M. Wiedenbeck, L.P. Bédard, R. Bugoi, M. Horan, K. Linge, S. Merchel, L.F.G. Morales, D. Savard, A.K. Souders, P. Sylvester, Critical Review of Analytical Developments Since 2012, Geostandards and Geoanalytical Research 38 (2014) 467-512.

2013

S. Akhmadaliev, R. Heller, D. Hanf, G. Rugel, S. Merchel, The new 6 MV AMS-facility DREAMS at Dresden, Nucl. Instr. and Meth. in Phys. Res. B 294 (2013) 5-10.

M. Arnold, G. Aumaître, D.L Bourlès, K. Keddadouche, R. Braucher, R.C Finkel, E. Nottoli, L. Benedetti, S. Merchel, The French accelerator mass spectrometry facility ASTER after 4 years: Status and recent developments on ³⁶Cl and ¹²⁹I, Nucl. Instr. and Meth. in Phys. Res. B 294 (2013) 24-28.

K. Hahne, R. Naumann, S. Niedermann, H.-U. Wetzel, S. Merchel, G. Rugel, Geochemische Untersuchungen an Moränen des Inylchek-Gletschers im Tien Shan, System Erde. GFZ-Journal 3 (2) (2013) 44-49.

D. Hampe, B. Gleisberg, S. Akhmadaliev, G. Rugel, S. Merchel, Determination of ⁴¹Ca with LSC and AMS: method development, modifications and applications, Journal of Nuclear and Radioanalytical Chemistry 296 (2013) 617-624.

J. Llorca, J. Roszjar, J.A. Cartwright, A. Bischoff, A. Pack, U. Ott, S. Merchel, G. Rugel, L. Fimiani, P. Ludwig, D. Allepuz, J.V. Casado, The Ksar Ghilane 002 shergottite – the 100^th registered Martian meteorite fragment, Meteorit. Planet. Sci. 48 (2013) 493–513.

S. Merchel, R. Braucher, V. Alfimov, M. Bichler, D.L. Bourlès, J.M. Reitner, The potential of historic rock avalanches and man-made structures as chlorine-36 production rate calibration sites, Quat. Geochron. 18 (2013) 54-62.

S. Merchel, W. Bremser, D.L. Bourlès, U. Czeslik, J. Erzinger, N.-A. Kummer, L. Leanni, B. Merkel, S. Recknagel, U. Schaefer, Accuracy of ⁹Be-data and its influence on ¹⁰Be cosmogenic nuclide data, J. Radioanal. Nucl. Chem. 298 (2013) 1871-1878.

C. Yildirim, T.F. Schildgen, H. Echtler, D. Melnick, B. Bookhagen, A. Çiner, S. Niedermann, S. Merchel, M. Martschini, P. Steier, M. R. Strecker, Tectonic implications of fluvial incision and pediment deformation at the northern margin of the Central Anatolian Plateau based on multiple cosmogenic nuclides, Tectonics 32 (2013) 1107-1120.

R. Zech, I. Röhringer, P. Sosin, H. Kabgov, S. Merchel, S. Akhmadaliev, W. Zech, Late Pleistocene glaciation in the Gisssar Range, Tajikistan, based on ¹⁰Be surface exposure dating, Palaeogeography, Palaeoclimatology, Palaeoecology 369 (2013) 253-261.

2012

S. Merchel, S. Akhmadaliev, S. Pavetich, G. Rugel, Ungeduldige Forscher träumen mit DREAMS - Bestimmung langlebiger Radionuklide mit Beschleunigermassenspektrometrie, GIT Labor-Fachzeitschrift 56 (2012) 88-90.

S. Merchel, W. Bremser, S. Akhmadaliev, M. Arnold, G. Aumaître, D. L. Bourlès, R. Braucher, M. Caffee, M. Christl, L. K. Fifield, R. C. Finkel, S. P. H. T. Freeman, A. Ruiz-Gómez, P. W. Kubik, M. Martschini, D. H. Rood, S. G. Tims, A. Wallner, K. M. Wilcken, S. Xu, Quality assurance in accelerator mass spectrometry: Results from an international round-robin exercise for ¹⁰Be, Nucl. Instr. and Meth. in Phys. Res. B. 289 (2012) 68-73.

2011

R. Braucher, S. Merchel, J. Borgomano, D.L Bourlès, Production of cosmogenic radionuclides at great depth: A multi element approach, Earth Planet. Sci. Lett. 309 (2001) 1-9.

S. Merchel, W. Bremser, V. Alfimov, M. Arnold, G. Aumaître, L. Benedetti, D. L. Bourlès, M. Caffee, L. K. Fifield, R. C. Finkel, S. P. H. T. Freeman, Y. Matsushi, D. H. Rood, K. Sasa, P. Steier, T. Takahashi, M. Tamari, S. G. Tims, Y. Tosaki, K. M. Wilcken, S. Xu, Ultra-trace analysis of ³⁶Cl by accelerator mass spectrometry: an interlaboratory study, Anal. Bioanal. Chem. 400 (2011) 3125-3132.

2010

M. Altmaier, U. Herpers, G. Delisle, U. Ott, S. Merchel, Glaciation history of Queen Maud Land (Antarctica) using in-situ produced cosmogenic ¹⁰Be, ²⁶Al and ²¹Ne, Polar Science 4 (2010) 42-61.

M. Arnold , S. Merchel, D.L. Bourlès, R. Braucher, L. Benedetti, R.C. Finkel, G. Aumaître, A. Gottdang, M. Klein, The French accelerator mass spectrometry facility ASTER: Improved performance and developments, Nucl. Instr. and Meth. in Phys. Res. B 268 (2010) 1954-1959.

S. Merchel, L. Benedetti, D.L. Bourlès, R. Braucher, A. Dewald, T. Faestermann, R.C. Finkel, G. Korschinek, J. Masarik, M. Poutivtsev, P. Rochette, G. Rugel, K.-O. Zell, A multi-radionuclide approach for in situ produced terrestrial cosmogenic nuclides: ¹⁰Be, ²⁶Al, ³⁶Cl and ⁴¹Ca from carbonate rocks, Nucl. Instr. and Meth. in Phys. Res. B 268 (2010) 1179-1184.

T. Orlowski, O.Forstner, R. Golser, W. Kutschera, S. Merchel, M. Martschini, A. Priller, P. Steier, C. Vockenhuber, A. Wallner, Comparison of detector systems for the separation of ³⁶Cl and ³⁶S with a 3-MV tandem, Nucl. Instr. and Meth. in Phys. Res. B 268 (2010) 847-850.

P. Steier, R. Golser, W. Kutschera, M. Martschini, S. Merchel, T. Orlowski, A. Priller, C. Vockenhuber, A. Wallner, ³⁶Cl exposure dating with a 3-MV tandem, Nucl. Instr. and Meth. in Phys. Res. B 268 (2010) 744-747.

 

---

Members

Dr. Silke Merchel Dr. Georg Rugel René Ziegenrücker

Alumni (incl. HIF-IBA-Group:

Amélie Chabilan (internship - with IBC), Tamás Ditrói (DAAD student - with IBC), Sandra Dreßler (researcher), Dr. Santiago Miguel Enamorado Baez (Post-Doc), Christian Freiherr (Diplomand), Lubomir Gabriš (summer student), Dr. Andreas Gärtner (researcher - with IBC), Quentin Guelennoc (Diplomand), Max Günthner (summer student), Dr. Dominik Güttler (researcher - with IBC), Hendrik Herdler (Diplomand), Julien Huguet (master student), Victoria Kabanova (summer student), Madita Kudla (internship/trainee), Loic Le Bras (researcher), Alexandra Lightfoot (summer student), Roberto Llovera (researcher - with IBC), Malin Lüdicke (internship/trainee), Przemyslav Michalak (part-time PhD-student), Dr. Stefan Pavetich (PhD-student), Elizaveta Samoilova (internship/trainee), Dr. Andreas Scharf (researcher - with IBC), Katharina Schraut (internship/trainee), Katharina Stock (internship/trainee - with IBC), Collin Tiessen (student/part-time PhD-student), Stephanie Uhlig (part-time research assistant), Antonia Weber (internship/trainee), Hannes Wenzel (internship/trainee), Haosheng Wu (Diplomand)

---

News

• Latest publications of our group members
• Our scientific work in oral and poster presentations.
• Milestones of our large-scale facility research

November 2017 - The ECHo (Electron Capture in Holmium Experiment) team performs experiments at DREAMS. Development of AMS at DREAMS for experimental determination of the ratio 163Ho/166mHo in ECHo samples. The long-lived 166mHo (t1/2=1200 a) is an unwanted by-product of the 163Ho (t1/2=4570 a) production, which is reduced to ultra-low levels (~10-9) after sophisticated mass separation. For a background-free measurement of the 163Ho spectrum in the ECHo metallic magnetic calorimeters the absence of 166mHo is critical. f.l.t.r.: Felix Wiescher (JGU Mainz), Oliver Forstner (FSU Jena & HI Jena), Christoph Düllmann (GSI Darmstadt, JGU Mainz, HI Mainz), Holger Dorrer (JGU Mainz), Klaus Wendt (JGU Mainz), Silke Merchel & Georg Rugel (HZDR, HI Freiberg) and Tom Kieck (JGU Mainz).
June 2017 - DREAMS user Lisa Luna (U Potsam; now: NewClimate Institute for Climate Policy and Global Sustainability, Berlin) receives the graduation award (1.000 Euro) of the university of Potsdam 2017. She graduated in geosciences with her MSc work "A glacial chronology and cosmogenic nuclide cross calibration from the central southern Andean Plateau (Puna, 24°S)“. The university of Potsdam gives this yearly award to persons who show a high potential for scienctific work and further qualification. The work was performed under the supervision of Bodo Bookhagen, Institute of Earth and Environmental Science. Further information (in German only) can be found here: "Alumni des Monats 06/2017 - Lisa Luna ".
May 2017 - "Self-praise? - Never mind!" The HZDR Research Award 2016 goes to Silke Merchel and Georg Rugel for "The application and improvement of accelerator mass spectrometry (AMS)" (c) HZDR/André Wirsig
January 2017 - Meeting of project partners for BMBF-Förderung „Erforschung kondensierter Materie“ - Entwicklung einer effizienten Hochstromionenquelle für Untersuchungen von Mikrometeoriten mit Beschleunigermassenspektrometrie (Project part 1 (U Göttingen); Project part 2 (TU Berlin) at the Ion Beam Centre (IBC) f.l.t.r.: Andreas Scharf (IBC, HZDR), Jenny Feige (TU Berlin), Hans Hofsäß & Felipe Bregolin (U Göttingen), Silke Merchel & Georg Rugel (HIF, HZDR), Andreas Gärtner (Senckenberg Dresden).
Dezember 2016 - Treasure in ice core waste: Elsevier promotes our Open-Access-Paper in Results in Physics by making it a "Highlight". Original publication (Microarticle): L. Zipf, S. Merchel, P. Bohleber, G. Rugel, A. Scharf, Exploring ice core drilling chips from a cold Alpine glacier for cosmogenic radionuclide (10Be) analysis, Results in Physics 6 (2016) 78-79.
October 2016 - "Self-praise? - Never mind!" We are really proud about our second place in the poster competition at the "Archäometrie und Denkmalpflege" meeting in Göttingen for our German poster "Bestimmung langlebiger Radionuklide mittels Beschleunigermassenspektrometrie (AMS) für archäometrische Fragestellungen".
August 2016 - The first PNAS paper with DREAMS-data is published: P. Ludwig, S. Bishop, R. Egli, V. Chernenko, B. Deneva, T. Faestermann, N. Famulok, L. Fimiani, J.M. Gómez-Guzmán, K. Hain, G. Korschinek, M. Hanzlik, S. Merchel, G. Rugel, Time-Resolved Two Million Year Old Supernova Activity Discovered in the Earth's Microfossil Record, Proceedings of the National Academy of Sciences of the United States of America (PNAS) 113 (2016) 9232–9237. More information can be found in the common press release "Discovery of a time-resolved supernova signal in Earth’s microfossils". ©-Foto: NASA/CXC/SAO//TUM
April 2016 - Size does matter! ;-) Succesful sampling of big boulders from a rock fall in Namibia.
April 2016 - The first Nature paper with DREAMS-data is published: A. Wallner, J. Feige, N. Kinoshita, M. Paul, L.K. Fifield, R. Golser, M. Honda, U. Linnemann, H. Matsuzaki, S. Merchel, G. Rugel, S.G. Tims, P. Steier, T. Yamagata, S.R. Winkler, Recent near-Earth supernovae probed by global deposition of interstellar radioactive 60Fe, Nature 532 (2016) 69-72. A.L. Melott has been so excited about our research results and of those of our colleagues Breitschwerdt et al. that he decided to summarize both Nature papers in his publication "Stellar astrophysics: Supernovae in the neighbourhood". Or as we say here: A supernova seldom comes alone. You can read more on this in the press release.	©-Foto: NASA, ESA, R. Sankrit and W. Blair (Johns Hopkins University) / CC BY 3.0.
December 2015 - The first Science paper with DREAMS-data is published: W. Schwanghart, A. Bernhardt, A. Stolle, P. Hoelzmann, B.R. Adhikari, C. Andermann, S. Tofelde, S. Merchel, G. Rugel, M. Fort, O. Korup, Repeated catastrophic valley infill following medieval earthquakes in the Nepal Himalaya, Science Express. A press conference at the AGU Fall meeting introduced our paper and the one of Kargel et al. (Science Express) to the public. Instant notice was taken e.g. by Nature News. Thanks to our coauthors for sampling this big guy and trusting DREAMS to determine a 10Be exposure age as low as 330 years!	©-Foto: C. Andermann, GFZ.
October 2015 - DREAMS-User Dr. Jenny Feige (VERA, U Vienna; now TU Berlin) receives the "Klaus Tschira Preis für verständliche Wissenschaft" for her German paper "Astronomie unter dem Meer" (astronomy under the sea). ©-Foto: S. Pavetich.
October 2015 - Stefan Pavetich succesfully defends his PhD thesis "Determination of non-routine radionuclides by medium-energy accelerator mass spectrometry" at the TU Dresden - Congratulations, Dr. Pavetich! And best wishes for your Post-Doc at the ANU!
September 2015 - DREAMS-User Dr. Jenny Feige (VERA, U Vienna; now TU Berlin) receives the dissertation award of the division nuclear chemistry of the Gesellschaft Deutscher Chemiker (GDCh) for her work "Supernova-Produced Radionuclides in Deep-Sea Sediments Measured with AMS“. Prof. Christoph Düllmann hands the award over.
July 2015 - Team "Ion beam Analytics" brings light to the "Lange Nacht der Wissenschaften" (Researchers’ Night)... (c) Stephan Floss, Jana Grämer, Tina Schulz
June 2015 - Team building activity (HIF-Group IBA) in "Saxon Switzerland" (with guest from Switzerland and IBC-colleague)
January 2015 - Georg Rugel publishes with colleagues from Canberra, Wien, Garching, Jerusalem and Darmstadt in Nature Communications about "Abundance of live 244Pu in deep-sea reservoirs on Earth points to rarity of actinide nucleosynthesis".
January 2015 - Our DFG-project "Evolution of the western Namibian drainage systems since Eocene times – a multi-methodical approach" together with Senckenberg Naturhistorische Sammlungen Dresden starts with taking samples in Namibia. ©-Foto: Mandy Hofmann.
November/December 2014 - Knowledge-transfer: ANSTO- and VERA-colleagues Mike Hotchkis (2. from left), Peter Steier (2. from right) and Stephan Winkler (right) help us to develop actinides-AMS at DREAMS.
October 2014 - The HIAF scientists Anton Wallner (left) and Michaela Fröhlich (right) from the ANU in Canberra (DAAD project AUGEAS) help us again to perform heavy element mass spectrometry experiments and meet members of the User Selection Panel (Gunther Korschinek, TUM (middle) of the ion beam centre.
September 2014 - Our trainee, Malin Lüdicke (TU Dresden), learned how to do 10Be sample preparation, but also re-designed DREAMS.
July 2014 - Report (in German) about the Super-SIMS in the HZDR-Forschungsmagazin "entdeckt" - Ionen auf der Überholspur (picture by Oliver Killig).
Mai 2014 - Hundreds of visitors took the chance at the Tag des offenen Labors (Open day) to go on a guided tour led by the ion beam analytics group of HIF.
April 2014 - Our paper about the didicated ion source for volatiles is published. S. Pavetich, S. Akhmadaliev, M. Arnold, G. Aumaître, D. Bourlès, J. Buchriegler, R. Golser, K. Keddadouche, M. Martschini, S. Merchel, G. Rugel, P. Steier, Interlaboratory study of the ion source memory effect in 36Cl accelerator mass spectrometry, Nucl. Instr. and Meth. in Phys. Res. B Nucl. Instr. and Meth. in Phys. Res. B 329 (2014) 22–29. http://dx.doi.org/10.1016/j.nimb.2014.02.130
April 2014 - Our review paper reaches "Number One" of "Most accessed papers throughout 2013" of Geostandards and Geoanalytical Research (GGR). Our paper has achieved the highest download statistics (currently > 1400) ever for GGR. M. Wiedenbeck, R. Bugoi, M.J.M. Duke, T. Dunai, J. Enzweiler, M. Horan, K.P. Jochum, K. Linge, J. Košler, S. Merchel, L. Morales, L. Nasdala, R. Stalder, P. Sylvester, U. Weis, A. Zoubir, Critical Review of Analytical Developments since 2010, Geostandards and Geoanalytical Research 36 (2012) 337-398. http://dx.doi.org/10.1111/j.1751-908X.2012.00218.x
February 2014 - As the Super-SIMS-source has now its own "home", the installation starts by adjusting its height to the accelerator.
December 2013 - Arrival of the CAMECA IMS 7f-Auto - our new ion source for the Super-SIMS project.
September 2013 - We perform our first heavy element mass spectrometry experiments together with HIAF-scientists from Canberra (DAAD-project AUGEAS) at DREAMS.
September 2013 - We are proud to annouce that René has received a poster award! He presented our poster entitled "High-Speed PIXE – schnelle Multielementanalyse mit Ionenstrahlen" (R. Ziegenrücker, J. Buchriegler, D. Hanf, J. Gutzmer, S. Ihle, S. Merchel, F. Munnik, A.D. Renno, G. Rugel, O. Scharf) at the annual meeting of the nuclear chemistry division, which took place at Darmstadt as part of the GDCh-Wissenschaftsforum.
August 2013 - "First stone laying" of the Super-SIMS House-in-House.
13th-24th May 2013 - DREAMS scientists "learn" heavy element mass spectrometry at the HIAF @ ANU, Canberra (DAAD project AUGEAS).
18th December 2012 - First "element picture" taken at the HS-PIXE-Beamline.
September 2012 - The HIF trainees within the TU Dresden project "Lehrer studiert Unternehmen" (Lisa Michel und Rebecca Schmidt) are preparing AMS samples from manganese nodules.
September 2012 - The DFG supports our bilateral Networking (FRALAMS) with ASTER, Aix-en-Provence, France: Maurice Arnold @ DREAMS.
28th August 2012 - Installation of the 6.4 tons heavy Gabbro plate for Super-SIMS experiment.
August 2012 - First HIF trainee in the IBA group: Dominique Brising (TUBAF).
9th May 2012 - Arrival of Super-SIMS ion source.
March 2012 - First HIF trainee within the TU Dresden project "Lehrer studiert Unternehmen": Andreas Rieseler

• PR

Nanowerk News Nanotechnology Research and General News10.05.2012	Tons of equipment for nanograms of science
Press release 09.05.2012: Tons of equipment for nanograms of science (Photo (c) Elisabeth Gantz, Potsdam)

---

---