Intrinsic background radiation of LaBr3(Ce) detector via coincidence measurements and simulations

Intrinsic background radiation of LaBr3(Ce) detector via coincidence measurements and simulations
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通过符合测量和模拟获得 LaBr3(Ce) 探测器的本征背景辐射

DOI:
10.1007/s41365-020-00812-8
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发表时间:
2020-07
影响因子:
2.8
通讯作者:
Zheng Yun
Zheng Yun
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Cheng Hao;Sun Bao-Hua;Zhu Li-Hua;Li Tian-Xiao;Li Guang-Shuai;Li Cong-Bo;Wu Xiao-Guang;Zheng Yun

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LaBr_3(Ce)探测器由于其在分辨率和效率方面上级其他探测材料,近年来引起了人们的广泛关注。然而,由于镧、锕及其子核中天然存在的放射性同位素,它具有相对较高的固有背景辐射。这限制了它在低计数率实验中的应用。在这项研究中,我们确定了φ 3“”× 3“”圣戈班B380探测器的放射性同位素符合测量使用三叶草探测器在低背景屏蔽系统。此外,我们进行了一个Geant 4模拟的实验光谱,以评估的主要内部辐射成分的活动。测得B380的本底总放射性活度为1.523(34)Bq/cm(3)。主要来源包括La-138为1.428(34)Bq/cm(3),Tl-207为0.0135(13)Bq/cm(3),Bi-211为0.0136(15)Bq/cm(3),Po-215为0.0135(3)Bq/cm(3),Rn-219为0.0125(12)Bq/cm(3),Fr-223为0.0019(11)Bq/cm(3),Ra-223为0.0127(10)Bq/cm(3),Th-227为0.0158(22)Bq/cm(3),Ac-227为0.0135(13)Bq/cm(3)。其中,Tl-207,Po-211,Po-215,Fr-223和Ac-227的活性是首次从Ac-227衰变链中建立的长期平衡推导出来的。
The LaBr3(Ce) detector has attracted much attention in recent years because of its superior characteristics compared with other scintillating materials in terms of resolution and efficiency. However, it has a relatively high intrinsic background radiation because of the naturally occurring radioisotopes in lanthanum, actinium, and their daughter nuclei. This limits its applications in low-counting rate experiments. In this study, we identified the radioactive isotopes in the phi 3 '' x 3 '' Saint-Gobain B380 detector by a coincidence measurement using a Clover detector in a low-background shielding system. Moreover, we carried out a Geant4 simulation of the experimental spectra to evaluate the activities of the main internal radiation components. The total activity of the background radiation of B380 is determined to be 1.523 (34) Bq/cm(3). The main sources include La-138 at 1.428 (34) Bq/cm(3), Tl-207 at 0.0135 (13) Bq/cm(3), Bi-211 at 0.0136 (15) Bq/cm(3), Po-215 at 0.0135 (3) Bq/cm(3), Rn-219 at 0.0125 (12) Bq/cm(3), Fr-223 at 0.0019 (11) Bq/cm(3), Ra-223 at 0.0127 (10) Bq/cm(3), Th-227 at 0.0158 (22) Bq/cm(3), and Ac-227 at 0.0135 (13) Bq/cm(3). Of these, the activities of Tl-207, Po-211, Po-215, Fr-223, and Ac-227 are deduced for the first time from the secular equilibrium established in the decay chain of Ac-227.
DOI: 10.1088/1674-1137/36/4/016
发表时间: 2012-04
期刊: Chinese Physics C
影响因子: 3.6
作者:
刘军辉;李道武;章志明;王宝义;张天保;郝佳;魏龙
通讯作者: 刘军辉;李道武;章志明;王宝义;张天保;郝佳;魏龙
DOI: 10.1063/1.4803440
发表时间: 2013-04-22
影响因子: 4
作者:
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通讯作者: Dorenbos, P.
DOI: 10.1016/b978-0-08-099438-3.00003-3
发表时间: 2019
期刊: Compostable Polymer Materials
影响因子: --
作者:
Ewa Rudnik
通讯作者: Ewa Rudnik
影响因子: 1.4
作者:
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DOI: 10.1109/nssmic.1997.672570
发表时间: 1997-11
期刊: 1997 IEEE Nuclear Science Symposium Conference Record
影响因子: --
作者:
M. Moszynski;M. Kapusta;D. Wolski;M. Szawłowski;W. Klamra
通讯作者: M. Moszynski;M. Kapusta;D. Wolski;M. Szawłowski;W. Klamra