Article ; Online: Development of a novel low-pressure scintillation cell with ZnS(Ag)-coated clapboard for Rn-220 measurement.
2023 Volume 203, Page(s) 111107
Abstract: The high-precision measurement of Rn-220 is essential for assessing and preventing thoron radiological hazards. Prior research has revealed that employing a scintillation cell without a clapboard improves the detection efficiency for both Rn-222 and Rn- ... ...
| Abstract | The high-precision measurement of Rn-220 is essential for assessing and preventing thoron radiological hazards. Prior research has revealed that employing a scintillation cell without a clapboard improves the detection efficiency for both Rn-222 and Rn-220 by reducing air pressure, and the Rn-220 calibration factor is established at an atmospheric pressure of 0.4. However, the decrease in air pressure leads to a corresponding reduction in Rn-220 concentrations within the scintillation cell, resulting in lower counts and larger statistical fluctuations. For the purpose of addressing this issue, a ZnS(Ag)-coated clapboard was added to the low-pressure scintillation cell for measuring Rn-222 and Rn-220. Several experiments were conducted in conjunction with Monte Carlo simulations. The results of these simulations, along with experiments using the standard radon chamber, provide valuable references for establishing the Rn-220 calibration factor. The experimental findings demonstrate that saturated detection efficiency of Rn-222 and Rn-220 can be maintained at below 0.7 atmospheric pressure. Therefore, the Rn-220 calibration factor, determined with the detection efficiency of 0.73 ± 0.04 at an atmospheric pressure of 0.7, was determined to be 31.98 ± 1.83 Bq·m |
|---|---|
| Language | English |
| Publishing date | 2023-11-08 |
| Publishing country | England |
| Document type | Journal Article |
| ZDB-ID | 1142596-9 |
| ISSN | 1872-9800 ; 0883-2889 ; 0969-8043 |
| ISSN (online) | 1872-9800 |
| ISSN | 0883-2889 ; 0969-8043 |
| DOI | 10.1016/j.apradiso.2023.111107 |
| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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