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arXiv 1306.3784nucl-ex
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LAMBDA谱仪的中子响应和BaF2中的中子相互作用长度

Neutron response of the LAMBDA spectrometer and neutron interaction length in BaF2

Balaram Dey, Debasish Mondal, Deepak Pandit, S. Mukhopadhyay, Surajit Pal, K. Banerjee, Srijit Bhattacharya, A. De, S. R. Banerjee

摘要:

我们报告的中子响应的LAMBDA光谱仪早期开发的高能γ射线测量。利用飞行时间(TOF)技术测量了该谱仪的能量相关中子探测效率,并与有机液体闪烁体中子探测器(BC501A)的中子探测效率进行了比较。提取效率也进行了比较,从Monte Carlo GEANT 4模拟得到的。我们还在一个单独的实验中测量了BaF2晶体中中子的平均相互作用长度,以确定TOF能量分辨率。最后,LAMBDA谱仪在束流实验中进行了测试,通过测量4He + 93Nb反应中的中子能谱来提取核能级密度参数。实验结果表明,LAMBDA谱仪测量的核能级密度参数与BC501A中子探测器测量的核能级密度参数基本一致,表明LAMBDA谱仪可以有效地作为中子探测器测量核能级密度参数。

英文摘要:

We report on the neutron response of the LAMBDA spectrometer developed earlier for high-energy gamma-ray measurement. The energy dependent neutron detection efficiency of the spectrometer has been measured using the time-of-flight (TOF) technique and compared with that of an organic liquid scintillator based neutron detector (BC501A). The extracted efficiencies have also been compared with those obtained from Monte Carlo GEANT4 simulation. We have also measured the average interaction length of neutrons in the BaF2 crystal in a separate experiment, in order to determine the TOF energy resolution. Finally, the LAMBDA spectrometer has been tested in an in-beam-experiment by measuring neutron energy spectra in the 4He + 93Nb reaction to extract nuclear level density parameters. Nuclear level density parameters obtained by the LAMBDA spectrometer were found to be consistent with those obtained by the BC501A neutron detector, indicating that the spectrometer can be efficiently used as a neutron detector to measure the nuclear level density parameter.

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