Unfolding neutron spectrum using Doppler broadened γ peak shapes

被引：0
|
作者：
Lu, Yi [1 ,2 ]
Song, Zhaohui [2 ]
Cui, Zengqi [1 ]
Bai, Huaiyong [1 ]
Jiang, Haoyu [1 ]
Zhang, Luyu [1 ]
Zhang, Guohui [1 ]
机构：
[1] Peking Univ, Sch Phys, Inst Heavy Ion Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[2] Northwest Inst Nucl Technol, State Key Lab Intense Pulsed Radiat Simulat & Eff, Xian 710024, Peoples R China
来源：
RADIATION PHYSICS AND CHEMISTRY | 2021年 / 188卷
关键词：
Doppler broadening; Neutron spectrum unfolding; SAND-II iteration;
D O I：
10.1016/j.radphyschem.2021.109647
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The Doppler broadening of gamma rays occurs in the fast neutron analysis with photons emitted in inelastic scattering reactions on certain nuclei, such as 12C and 14N. In this paper, we developed an algorithm based on the Monte Carlo method to calculate the Doppler broadened gamma peak shape of the 4.438 MeV gamma ray emitted by 12C in graphite when exposed to fast neutrons of different energies. The SAND-II unfolding iterative method is applied to obtain the spectrum of the incident neutron beam by using the Doppler broadened gamma spectra. In the calculation example, the unfolded neutron spectrum shows reasonable agreements with the original incident neutron spectrum.
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页数：5
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