Title: A new detector system for the measurement of high-energy prompt γ-rays for low-energy neutron induced fission
Authors: MAKII HIROYUKINISHIO K.HIROSE K.ORLANDI R.LEGUILLON R.OGAWA T.SOLDNER T.HAMBSCH FRANZ-JOSEFAICHE MOURADASTIER A.CZAJKOWSKI SERGEFROST R.GUO S.KÖSTER U.MATHIEU L.OHTSUKI T.PETRACHE C.POLLITT A.SEKIMOTO S.TAKAMIYA K.TSEKHANOVICH I.
Citation: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 906 p. 88-96
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2018
JRC N°: JRC111122
ISSN: 0168-9002
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC111122
DOI: 10.1016/j.nima.2018.07.055
Type: Articles in periodicals and books
Abstract: We have developed a new setup to measure prompt fission γ-ray spectra in neutron induced fission up to energies sufficient to reveal the structure associated with giant dipole resonances of fission fragments. The setup consists of multi-wire proportional counters, to detect both fission fragments in coincidence, and two large volume (101.6 mm in diameter and 127.0 mm in length) LaBr3(Ce) scintillators, to measure the γ rays. The setup was used to obtain the prompt fission γ-ray spectrum for thermal neutron induced fission of 235U at the PF1B cold-neutron beam facility of the Institut Laue-Langevin, Grenoble, France. We have successfully measured the γ-ray spectrum up to energies of about 20 MeV, what extends the currently known γ-ray spectrum limit to higher energies by approximately a factor of two.
JRC Directorate:Nuclear Safety and Security

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