Use of gamma-ray spectroscopy in thickness gauging of a complex-shaped lead shield

IF 1.8 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2026-02-01 Epub Date: 2025-12-02 DOI:10.1016/j.radmeas.2025.107582

Joseph Graham , Brian Durtschi , Ashish Avachat , Seth Kilby

引用次数: 0

Abstract

Methods for measuring the thickness of lead shielding based on ⁶⁰Co gamma-ray spectroscopy are presented. In applications where a shield’s thickness is multiple mean free paths and the shield has a complex shape (i.e. cannot be approximated as a simple solid such as a slab, sphere, semi-infinite medium, etc.), the necessary buildup factors are not available. Thus, determination of shield thickness by means of the Beer–Lambert law requires separating the counts from uncollided photons from the scattered photon contribution. It is demonstrated how the 1332 keV gamma ray of ⁶⁰Co can be used to precisely quantify lead thicknesses up to at least

\sim

280 mm. Use of the ratio of 1173 keV to 1332 keV photopeak areas to determine thickness is also discussed.

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伽玛射线光谱在复杂形状铅屏蔽厚度测量中的应用

提出了基于60Co伽马能谱法测量铅屏蔽层厚度的方法。在屏蔽厚度为多个平均自由路径且屏蔽具有复杂形状的应用中（即不能近似为简单的固体，如板，球体，半无限介质等），不可用必要的累积因子。因此，通过比尔-朗伯定律确定屏蔽厚度需要将未碰撞光子的计数与散射光子的贡献分开。演示了60Co的1332 keV伽马射线如何用于精确量化铅的厚度，厚度至少可达~ 280 mm。利用1173 keV与1332 keV光峰面积的比值来确定厚度也进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.