Time sequence method for prompt neutron decay constant determination

被引：0

作者：

Wen, Jie ^{[1
]}

Li, Meng ^{[1
]}

Gao, Hui ^{[1
]}

Jiang, Yong ^{[1
]}

Zhou, Haojun ^{[1
]}

Song, Lingli ^{[1
]}

Wang, Qiang ^{[1
]}

Yin, Yanpeng ^{[1
]}

Xie, Qilin ^{[1
]}

机构：

[1] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Sichuan, Peoples R China

来源：

ANNALS OF NUCLEAR ENERGY | 2021年 / 160卷

基金：

中国国家自然科学基金;

关键词：

Time sequence; Prompt neutron decay constant; Fast critical assembly; Rossi-alpha; Delayed critical;

D O I：

10.1016/j.anucene.2021.108376

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Aiming at measuring the prompt neutron decay constant a of fast critical assemblies, Rossi-alpha method was improved by means of the acquisition of neutron and gamma time sequence. The application of the time sequence method in delayed critical & subcritical experiments at a fast critical assembly was here in described, focus in particular on the gamma analysis and the exploration of A/C ratio which directly affects the measurement precision of alpha. The reliability of the time sequence method is proved by the agreement of the a values obtained based on neutron and gamma. The A/C ratio based on neutron and gamma shows an obvious difference and the corresponding conclusion guides to a larger A/C ratio. The time sequence method shows advantages of higher experimental efficiency and flexible data analysis which contribute to more accurate experimental result. (C) 2021 Elsevier Ltd. All rights reserved.

引用

页数：8

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