Chinese Physics C > 2014, Vol. 38 > Issue(7): 078201 DOI: 10.1088/1674-1137/38/7/078201

A Monte Carlo simulation and setup optimization of output efficiency to PGNAA thermal neutron using²⁵²Cf neutrons

ZHANG Jin-Zhao^,,
TUO Xian-Guo

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Abstract：
We present the design and optimization of a prompt γ-ray neutron activation analysis (PGNAA) thermal neutron output setup based on Monte Carlo simulations using MCNP5 computer code. In these simulations, the moderator materials, reflective materials, and structure of the PGNAA ²⁵²Cf neutrons of thermal neutron output setup are optimized. The simulation results reveal that the thin layer paraffin and the thick layer of heavy water moderating effect work best for the ²⁵²Cf neutron spectrum. Our new design shows a significantly improved performance of the thermal neutron flux and flux rate, that are increased by 3.02 times and 3.27 times, respectively, compared with the conventional neutron source design.

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ZHANG Jin-Zhao and TUO Xian-Guo. A Monte Carlo simulation and setup optimization of output efficiency to PGNAA thermal neutron using ²⁵²Cf neutrons[J]. Chinese Physics C, 2014, 38(7): 078201. doi: 10.1088/1674-1137/38/7/078201

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Received: 2013-09-05
Revised: 1900-01-01

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通讯作者:陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

A Monte Carlo simulation and setup optimization of output efficiency to PGNAA thermal neutron using²⁵²Cf neutrons

Corresponding author:ZHANG Jin-Zhao,

Received Date:2013-09-05

Accepted Date:1900-01-01

Available Online:2014-07-05

Abstract:We present the design and optimization of a promptγ-ray neutron activation analysis (PGNAA) thermal neutron output setup based on Monte Carlo simulations using MCNP5 computer code. In these simulations, the moderator materials, reflective materials, and structure of the PGNAA²⁵²Cf neutrons of thermal neutron output setup are optimized. The simulation results reveal that the thin layer paraffin and the thick layer of heavy water moderating effect work best for the²⁵²Cf neutron spectrum. Our new design shows a significantly improved performance of the thermal neutron flux and flux rate, that are increased by 3.02 times and 3.27 times, respectively, compared with the conventional neutron source design.

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A Monte Carlo simulation and setup optimization of output efficiency to PGNAA thermal neutron using²⁵²Cf neutrons

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