A new detector system for the measurement of high-energy prompt gamma-rays for low-energy neutron induced fission
A new detector system for the measurement of high-energy prompt gamma-rays for low-energy neutron induced fission
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用于测量低能中子诱发裂变的高能瞬发伽马射线的新型探测器系统
DOI：
10.1016/j.nima.2018.07.055
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
I. Tsekhanovic
中科院分区：
文献类型：
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作者：
H. Makii;K. Nishio;K. Hirose;R. Orlandi;R. Leguillon;T. Ogawa;T. Soldner;F.-J. Hambsch;M. Aiche;A. Astier e; S. Czajkowski;R. Frost;S. Guo;U. Koster;L. Mathieu;T. Ohtsuki;C.M. Petrache;A. Pollitt;S. Sekimoto;K. Takamiya; I. Tsekhanovic
我们已经开发了一种新的装置来测量中子诱导裂变中的触发裂变γ射线能谱，其能量足以揭示与裂变碎片的巨大偶极子共振相关的结构。该装置由多线比例计数器组成，用于同时检测裂变碎片，以及两个大体积（直径101.6 mm，长度127.0 mm） LaBr 3 （Ce）闪烁体，用于测量γ射线。该装置在法国格勒诺布尔Laue-Langevin研究所的PF1B冷中子束装置上获得了235 U热中子诱导裂变的促裂变γ射线谱。我们已经成功地测量了高达20 MeV能量的γ射线光谱，这将目前已知的γ射线光谱极限扩展到更高的能量，大约是原来的两倍。
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) LaBr 3 (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 235 U 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.