Porträt Dr. Wagner, Andreas; FWKK

Dr. Andreas Wagner
Head Nuclear Physics
Phone: +49 351 260 - 3261
Fax: +49 351 260 - 13261

orangener PfeilPositron Studies of Defects (PSD-17), HZDR 3. - 9. September, 2017

The aims of this workshop are to bring together positron scientists who interested in studying defects in materials for various applications and to provide an international platform to present and discuss recent results and achievements as well as on new experimental and theoretical methods in this field.

orangener PfeilWorkshop on Methods of Porosimetry and Applications, HZDR, 21.-23.10.2015

The workshop focussed on various methods of porosimetry, such as N2 absotrption, Hg-intrusion, SAXS, SANS, and positron annihilation.


Division of Nuclear Physics

The nuclear physics division at Helmholtz-Center Dresden-Rossendorf performs research on the structure of atomic nuclei and reactions between atomic nuclei. Our research helps to understand the genesis of the chemical elements in cosmic scenarios and applies such knowledge in nuclear interactions to advanced concepts in nuclear waste management and reduction. Furthermore, we develop new types of radiation detectors for fundamental research, medicine, and applications. We perform applied materials research using nuclear physics methods, and we are responsible for several user beam lines at the superconducting electron linear accelerator ELBE.

nELBE Experiment (Photo) MePS Positronen Strahlführung an ELBE 5MV Pelletron-Beschleuniger für den Felsenkeller, Entladen am HZDR

Nuclear Physics Data  for Science and Technology


Positron Annihilation Spectroscopy

Detector technologies: Experimental nuclear astrophysics
at LUNA and in Dresden

Dr. Arnd R. Junghans

Dr. Ronald Schwengner

Dr. Andreas Wagner

PD Dr. Daniel Bemmerer

We investigate neutron-induced and photonuclear reactions to provide data relevant to basic science, nuclear astrophysics, and technology.

  • At the nELBE photo-neutron source an intensive, continuous spectrum of 1011 neutrons per second is generated. Time of flight measurements allow to precisely determine reaction rates of inelastic neutron scattering and neutron induced fission.
  • The γELBE bremsstrahlung source generates a photon spectrum with an end point energy of up to 18 MeV. Nuclear reactions and nuclear structure are studied by photon scattering and photoactivation, both in conjunction with high resolution γ spectroscopy.

Positron Annihilation Spectroscopy (PAS) allows non-destructive investigations in the research fields materials research, chemistry, and biological tissue. Positrons, being the anti-particles of electrons, are employed as highly sensitive probes for material defects at the nanometer scale.

At HZDR, several setups with complementary features are used in PAS research:

  • MePS: Mono-energetic Positron Source at the superconducting elelectron LINAC ELBE.
  • GiPS: Gamma-induced Positron Source at ELBE using high energy photons from bremsstrahlung production inside the sample.
  • SPONSOR: Mono-energetic positron beam fed by the decay of Na-22 for (Coincidence-) Doppler-broadening spectroscopy.
  • LT: Conventional positron annihilation lifetime spectroscopy (based on Na-22).

Nuclear reactions power our Sun, and they create the chemical elements that are necessary for human life.

  • We study astrophysically important radiative-capture reactions: in Dresden at the surface of the Earth, and at LUNA deep underground in the Gran Sasso/Italy. We plan to upgrade the Felsenkeller underground laboratory in Dresden by installing a high-current 5MV accelerator there.
  • We develop time-of-flight detectors of 0.1 ns time resolution, enabling kinematically complete experiments. To this end we study silicon photomultiplier (SiPM) based readout for a scintillator-based NeuLAND detector.


  • Mirco Dietz won the Best Poster Award for his contribution to the ND 2016 (International Conference on Nuclear Data for Science and Technology). Congratulations to Mirco!
  • Several hundreds of visitors during Dresden's "Lange Nacht der Wissenschaften" found their way to the upcoming underground laboratory Felsenkeller. Thanks go to Marcel Grieger,Felix Ludwig,Stefan Reinicke,Stefan Schulz,Louis Wagner, and Daniel Bemmerer for their enthusiasm and their effort during the presentations.
  • We published an article with the title Alles im Fluss about the facility ELBE in the member magazine Physik Journal of the German Physical Society.
  • Mirco Dietz received the "Best Poster Presentation award" at the ICTP-IAEA School on "Nuclear data measurements for science and applications" from 19 - 30 October 2015 for his contribution "γ-angular distributions af 56Fe(n,n'γ) @ nELBE Time-of-Flight facility". Congratulations, Mirco!
  • The positron group organized an international workshop with 55 parricipants on "Methods and Applicatons of Porosimetry" from 21. - 23. October, 2015.
  • Konrad Schmidt defendend his PhD thesis (about experimental studies of the 40Ca(α,γ)44Ti reaction) with distinction (summa cum laude) June 29th, 2015 at the Technische Universität Dresden. Super, Konrad!
  • Marco Jungmann successfully defendend his PhD thesis (about the monoenergetic positron source at ELBE and porosity of thin low-k films) June 1st, 2015 at Martin-Luther-Universität Halle-Wittenberg. All the best, Marco!
  • Roland Hannaske defended his PhD thesis (about deuteron break-up experiments for the big bang nucleosynthesis) with distinction (summa cum laude) May 26st, 2015 at the Technische Universität Dresden. Congratulations, Roland!
  • Georg Schramm (diploma thesis in nuclear physics) defended his PhD thesis (Dr. rer. medic) with distinction (summa cum laude) January 21st, 2015. Congratulations, Georg!
  • Arnd Junghans organized an International Workshop on Elastic and Inelastic Neutron Scattering at HZDR from Dec. 3 - 5, 2014.
  • Roland Beyer and Marko Röder, both successfully defended their PhD theses in November 2014 at TU Dresden. Congratulations, Roland and Marko!
  • Ralph Massarczyk very successfully defended his PhD thesis October 14, 2014 at TU Dresden. He now accepted a post-doc position at the Los Alamos National Laboratory in New Mexico. We wish you all the best for the future, Ralph!
  • Louis Wagner and Thu Trang Trinh landed  the 2nd and the 3rd place in the "Best Poster" contest at the 2014 PhD day of the HZDR in Altenberg. Congratualtions to both of you!
  • Ronald Schwengner organized the Fifteenth International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics
    (CGS15) from August 23 to 29, 2015 in Dresden.
  • Michael Anders is first author of an article in "Physical Review Letters" on the confirmation of a persistent problem of the abundance of Lithium isotops generated in the Big Bang. Great work, Micha!
  • Wolfgang Anwand is a coauthor of an article which appeared in "Applied Physics Letters" (highest impact factor of applied physics journals) on red luminescence in Zinc Oxide. Imagine a life without zinc, Wolfgang!
  • Konrad Schmidt is one of the poster price laureates of the conference Nuclei in the Cosmos XIII (July 2014, Debrecen, Hungary). Congratulations Konrad!
  • Maik Butterling defended his PhD thesis summa cum laude July 3rd, 2014 at the Martin-Luther-Universität Halle-Wittenberg. Congratulations Maik!
  • Ralph Massarczyk is the first author of  the paper "Nuclear Deformation and Neutron Excess as Competing Effects for Dipole Strength in the Pygmy Region" which presents a part of his PhD thesis work in "Physical Review Letters". Congratulations Ralph!
  • Klaus Heidel, Manfred Sobiella and members of the Oncoray team now (21.01.2014) hold a patent on a special contacting technology for CdZnTe semiconductor detectors. Congratulations!

Third party funded projects

  • EU-FP7 "CHANDA: solving CHAllenges in Nuclear DAta", A. R. Junghans (2013-2017)
  • DAAD "PPP Tschechien: Leerstellen und Leerstellen-Wasserstoffkomplexe in ZnO", W. Anwand (2015-2016)
  • Helmholtz-Gemeinschaft, Partner beim virtuellen Institut NAVI, D. Bemmerer (2011-2016)
  • DFG "Untersuchung des Einflusses der Kerndeformation auf Dipol-Stärkeverteilungen", R. Schwengner (2011-2014)
  • DAAD "PPP Tschechien: UNtersuchung der Mikrostruktur dünner Metallfilme", W. Anwand (2011-2012)
  • DFG "alpha capture for astrophysics", D. Bemmerer (2009-2014)
  • EU-FP7 "ERINDA: European Research Infrastructures for Nuclear Data Applications ", A. R. Junghans (2010-2013, project coordinator)
  • BMBF "Energie 2020+", A. Junghans (2009-2012)
  • BMBF "Hadronen- und Kernphysik", T. Cowan / A. Wagner (2009-2012)
  • DFG "Photodissoziation des Deuterons", A. Junghans (2008-2012)
  • EU-FP6 "EFNUDAT: European Facilities for Nuclear Data Measurements", A. R. Junghans (2007-2010)


Dr. Andreas Wagner
Head Nuclear Physics
Phone: +49 351 260 - 3261
Fax: +49 351 260 - 13261