不同探源距下241Am的α谱模拟与解析

辐射防护 ›› 2024, Vol. 44 ›› Issue (S1): 24-27.

不同探源距下²⁴¹Am的α谱模拟与解析

潘蓝天, 李瑞, 范磊, 黄欣杰, 陈祥磊, 王轶, 刘兴宇

武汉第二船舶设计研究所,武汉 430205

收稿日期:2023-11-23 出版日期:2024-11-20 发布日期:2024-12-26
作者简介:潘蓝天(1998—),男,2024年毕业于武汉第二船舶设计研究所核能科学与工程专业,工学硕士。E-mail:1925952756@qq.com

Simulation and analysis of ²⁴¹Am alpha spectrum with varying source to detector distance

PAN Lantian, LI Rui, FAN Lei, HUANG Xinjie, CHEN Xianglei, WANG Yi, LIU Xingyu

Wuhan Second Ship Design Institute, Wuhan 430205

Received:2023-11-23 Online:2024-11-20 Published:2024-12-26

摘要/Abstract

摘要： 本文研究了²⁴¹Am的α能谱,并对其产生过程进行了分析。在此基础上,推导了探测器响应函数,并针对²⁴¹Am的α能谱,基于指数函数卷积高斯函数建立了探测器响应函数模型。采用加权非线性最小二乘法获取模型参数,并使用Reχ²评估拟合优度。利用该模型对Geant4模拟得到的²⁴¹Am的α能谱进行重建,并研究了探测器与源之间的距离对拟合效果的影响。本文为搭建基于PIPS探测器的α谱仪和算法设计提供了理论指导。

关键词: α能谱, 探测器响应函数, 加权非线性最小二乘法, Geant4模拟

Abstract: This paper investigates the alpha energy spectrum of ²⁴¹Am and analyzes its generation process. Based on the analysis, detector response function is derived, and a detector response function model based on the convolution of exponential and Gaussian functions is established for the alpha energy spectrum of ²⁴¹Am. The model parameters are obtained using the weighted nonlinear least squares method, and the goodness of fit is evaluated using the Reχ². The model is then used to reconstruct the alpha energy spectrum of ²⁴¹Am obtained from Geant4 simulation. The impact of source-to-detector distance on fitting performance is investigated. This study could provide theoretical guidance for the development of an alpha spectrometer and algorithm design based on the PIPS detector.

Key words: alpha energy spectrum, detector response function, weighted nonlinear least squares method, Geant4 simulation

中图分类号:

TL816+.2

潘蓝天, 李瑞, 范磊, 黄欣杰, 陈祥磊, 王轶, 刘兴宇. 不同探源距下²⁴¹Am的α谱模拟与解析[J]. 辐射防护, 2024, 44(S1): 24-27.

PAN Lantian, LI Rui, FAN Lei, HUANG Xinjie, CHEN Xianglei, WANG Yi, LIU Xingyu. Simulation and analysis of ²⁴¹Am alpha spectrum with varying source to detector distance[J]. RADIATION PROTECTION, 2024, 44(S1): 24-27.

参考文献

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不同探源距下²⁴¹Am的α谱模拟与解析

Simulation and analysis of ²⁴¹Am alpha spectrum with varying source to detector distance

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