Contact
Dr. Arnd Junghans
Project leader
Nuclear Physics
a.junghans
hzdr.de
Phone: +49 351 260 3589
Neutrons at ELBE
Fast neutron facilities are generally of two types: white neutron sources and quasi-monoenergetic neutron sources. While the latter deliver neutron beams at a single energy, the white sources produce neutrons in a continuous range of energies when a beam of charged particles hits a heavy target like tungsten or lead. In this case, the energy of a neutron can be determined by measuring its velocity by flight time.
At the ELBE - Center for High-Power Radiation Sources of HZDR the very compact neutron time-of-flight system nELBE has been built. The electron beam emitted by the superconducting electron linear accelerator ELBE is used to produce a white neutron spectrum in a liquid-lead neutron radiator. The neutron kinetic energy ranges from below 100 keV to above 10 MeV with a variable repetition rate from single pulse operation to 400 kHz (c.w.). The flight path range is about 5 – 11 m.
In the fast neutron energy range, there is a need for neutron-induced reaction data relevant for basic science and technical applications. The long-term needs for nuclear data are updated every ten years by international experts at the International Atomic Energy Agency [1].
| 102, 203, 406 kHz | |
| 5 - 11 m | |
| ca. 1.6·1011 n/s | |
| ca. 2.5·104 n/cm2/s | |
| 10 keV - 15 MeV | |
| < 1% |
In addition, the TU Dresden DT neutron generator (contact: Prof. Dr. Kai Zuber, TU Dresden) that produces monoenergetic neutrons at 14 MeV is located in the ELBE accelerator hall. This facility is used for fusion neutronics studies and neutron activation experiments related to fundamental physics, e.g. the search for the neutrinoless double-beta decay.
[1] Long Term Needs for Nuclear Data Development (INDC(NDS)-0601, ed. A. Plompen 2011, Vienna: International Atomic Energy Agency Nuclear Data section)
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Recent publications
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Fast-neutron-induced fission cross section of Pu(242) measured at the neutron time-of-flight facility nELBE
T. KöglerORC; A. R. JunghansORC; R. BeyerORC; M. Dietz; C. E. DüllmannORC; K. Eberhardt; et al. (16 authors) Related publications Fast-neutron-induced fission cross section of Pu(242) … (Id 28970) HZDR-primary research data are used by this publication
Cross section and neutron angular distribution measurements of neutron scattering on natural iron
E. PirovanoORC; R. BeyerORC; M. Dietz; A. R. JunghansORC; S. E. Müller; R. Nolte; et al. (11 authors) Related publications Measurements of neutron scattering angular distributions … (Id 26138) HZDR-primary research data are used by this publication
Radiative neutron capture on 242Pu in the resonance region at the CERN n_TOF-EAR1 facility
J. Lerendegui-Marco; C. Guerrero; E. Mendoza; J. M. Quesada; K. Eberhardt; A. R. Junghans; et al. (133 authors)
The neutron transmission of natFe, 197Au and natW
R. BeyerORC; A. R. Junghans; P. Schillebeeckx; I. Sirakov; T.-Y. Song; D. Bemmerer; et al. (27 authors)
The γ-ray angular distribution in fast neutron inelastic scattering from iron
R. BeyerORC; M. Dietz; D. Bemmerer; A. R. Junghans; T. Kögler; R. Massarczyk; et al. (12 authors)
Measurements of neutron scattering angular distributions with a new scintillator setup
E. Pirovano; R. Beyer; A. R. Junghans; R. Nolte; M. Nyman; A. Plompen Related publications Cross section and neutron angular distribution … (Id 28211) has used this publication of HZDR-primary research data
The determination of the fast neutron-induced fission cross section of Pu(242) at nELBE
T. Kögler; R. Beyer; A. R. Junghans; S. E. Müller; R. Schwengner; A. Wagner
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Physical Review C 99(2019)2, 024604
Contact
Dr. Arnd Junghans
Project leader
Nuclear Physics
a.junghanshzdr.de
Phone: +49 351 260 3589
Dr. Roland Beyer
Beam line scientist, radiation protection officer FWK
Nuclear Physics
roland.beyer@hzdr.de
Phone: +49 351 260 3281
