“引力波能量”吊坠的天然放射性及其伴随的辐射风险。

The naturally occurring radioactivity of 'scalar energy' pendants and concomitant radiation risk.

机构信息

Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, UTM, Skudai, Johor, Malaysia.

Department of Physics, College of Education, University of Sulaimani, Sulaimani, Kurdistan, Iraq.

出版信息

PLoS One. 2021 Jun 1;16(6):e0250528. doi: 10.1371/journal.pone.0250528. eCollection 2021.

DOI:10.1371/journal.pone.0250528

PMID:34061865

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8168844/

Abstract

Forming part of a study of radiological risk arising from use of radioactive consumer products, investigation is made of pendants containing naturally occurring radioactive material. Based on use of gamma-ray spectrometry and Monte Carlo (MC) simulations, the study investigates commercially available 'scalar energy pendants'. The doses from these have been simulated using MIRD5 mathematical phantoms, evaluation being made of dose conversion factors (DCFs) and organ dose. Metallic pendants code MP15 were found to contain the greatest activity, at 7043 ± 471 Bq from 232Th, while glass pendants code GP11 were presented the greatest 238U and 40K activity, at 1001 ± 172 and 687 ± 130 Bq respectively. MP15 pendants offered the greatest percentage concentrations of Th, Ce, U and Zr, with means of 25.6 ± 0.06, 5.6 ± 0.005, 1.03 ± 0.04 and 28.5 ± 0.08 respectively, giving rise to an effective dose of 2.8 mSv for a nominal wearing period of 2000 h. Accordingly, these products can give rise to annual doses in excess of the public limit of 1 mSv.

摘要

作为放射性消费品使用所致放射性风险研究的一部分，对含有天然放射性物质的吊坠进行了调查。基于伽马射线光谱法和蒙特卡罗（MC）模拟，研究调查了市售的“标量能量吊坠”。使用 MIRD5 数学体模模拟了这些吊坠的剂量，评估了剂量转换系数（DCF）和器官剂量。代码为 MP15 的金属吊坠被发现含有最大的放射性活度，为 232Th 的 7043 ± 471 Bq，而代码为 GP11 的玻璃吊坠则呈现出最大的 238U 和 40K 活度，分别为 1001 ± 172 和 687 ± 130 Bq。MP15 吊坠的 Th、Ce、U 和 Zr 的百分比浓度最高，平均值分别为 25.6 ± 0.06、5.6 ± 0.005、1.03 ± 0.04 和 28.5 ± 0.08，这导致名义佩戴期为 2000 小时的有效剂量为 2.8 mSv。因此，这些产品的年剂量可能超过公众限值 1 mSv。