An Improved Passive CR-39-Based Direct 222Rn/220Rn Progeny Detector

被引：11

作者：

Hu, Jun ^{[1
]}

Yang, Guosheng ^{[2
]}

Kranrod, Chutima ^{[1
]}

Iwaoka, Kazuki ^{[2
]}

Hosoda, Masahiro ^{[1
,3
]}

Tokonami, Shinji ^{[1
]}

机构：

[1] Hirosaki Univ, Inst Radiat Emergency Med, 66-1 Hon Cho, Hirosaki, Aomori 0368564, Japan

[2] Natl Inst Quantum & Radiol Sci & Technol, Inage Ku, 4-9-1 Anagawa, Chiba 2638555, Japan

[3] Hirosaki Univ, Grad Sch Hlth Sci, 66-1 Hon Cho, Hirosaki, Aomori 0368564, Japan

来源：

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH | 2020年 / 17卷 / 22期

关键词：

Rn-222; progeny; Rn-220; CR-39; equilibrium equivalent concentration; deposition velocity; POTENTIAL ALPHA-ENERGY; THORON CONCENTRATION; PARTICLE DEPOSITION; RN-220; MODEL;

D O I：

10.3390/ijerph17228569

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An improved passive CR-39-based direct Rn-222/Rn-220 progeny detector with 3 detection channels was designed and tested in this study to measure and calculate equilibrium equivalent concentration (EEC) of both Rn-222 and Rn-220 without the equilibrium factor. A theoretical model was established to calculate the EEC with optimization. Subsequently, an exposure experiment was carried out to test the performance of this detector, and we compared the chamber experiment and the theoretical model by estimating and measuring various parameters. The deposition flux of progeny derived from the prediction agreed well with the value measured in the exposure chamber. The energy-weighted net track density (NTD) measured by this detector is much more reliable to reflect the linear relation between NTD and time-integrated EEC. Since the detector is sensitive to the exposure environmental condition, it is recommended to apply the detector to measure the EEC after its calibration in a typical indoor environment.

引用

页数：13

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