A Quench Index for 90Y and Its New Applications in 90Sr Analysis
Based on the customized quench index qx for 90Y and the modified 2-window approach, a simple method has been developed to analyze 90Sr using a liquid scintillation spectrometer, sometimes supplemented by γ spectrometer. The liquid scintillation counting(LSC) spectrum of 90Y exhibits good linearity i...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Journal of Nuclear and Radiochemistry
2025-06-01
|
| Series: | He huaxue yu fangshe huaxue |
| Subjects: | |
| Online Access: | https://jnrc.xml-journal.net/cn/article/doi/10.7538/hhx.2025.47.03.0259 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849684412098150400 |
|---|---|
| author | Xiao-gui FENG Jian-hua YUAN Qian-ge HE Xiao-jun JIN Xue-yan KONG Jian-chen WANG Jing CHEN |
| author_facet | Xiao-gui FENG Jian-hua YUAN Qian-ge HE Xiao-jun JIN Xue-yan KONG Jian-chen WANG Jing CHEN |
| author_sort | Xiao-gui FENG |
| collection | DOAJ |
| description | Based on the customized quench index qx for 90Y and the modified 2-window approach, a simple method has been developed to analyze 90Sr using a liquid scintillation spectrometer, sometimes supplemented by γ spectrometer. The liquid scintillation counting(LSC) spectrum of 90Y exhibits good linearity in the high-energy part, on the basis of which qx is defined. The key point of the modified 2-window approach is to obtain the ratio of the count rates of two windows(also known as region of interest, or ROI), CRH/CRW, where CRW is the count rate in ROIW, i.e. the whole region of interest(usually taken as channels 1-1024); CRH is the count rate in ROIH, i.e. the high-energy region of interest. The right endpoint of ROIH is usually fixed at channel 1024, and the left endpoint varies with the quenching level of the sample. This paper provides a method to select the left endpoint of ROIH and to keep the value of CRH/CRW about 0.2779, with the relative standard deviation of 0.84%. There are two prerequisites for using this method: (1) the quenching level of the sample is relatively low, in order that the counting efficiency of 90Sr or 90Y can be approximately considered as 100% in ROIW; (2) there is no interference from other nuclides than 90Y in ROIH. Three types of real samples from the hot test of high-level radioactive waste separation have been analyzed to show the specific steps of using this method. Because of the radioactive equilibrium of 90Sr/90Y in these samples, three ways of calculating the count rate of 90Sr have been adopted to verify each other. The first one is to obtain the count rate of 90Sr by subtracting the count rate of 90Y from the total count rate of 90Sr/90Y. The second one is just to let the count rate of 90Sr be equal to the count rate of 90Y. The third one is to divide the total count rate of 90Sr/90Y by 2 to obtain the count rate of 90Sr. The results indicate that the count rate of 90Sr obtained by this method is accurate and reliable. This method only requires linear fitting of the high-energy part of the LSC spectra. The method is simple and easy to use. With the application suggestions, users can choose appropriate analysis strategies according to the characteristics and analysis requirements of the sample. For analyzing 90Sr in samples of 90Sr/90Y with or without 137Cs, neither chemical separation nor waiting for the radioactive equilibrium of 90Sr/90Y is required, if the count rate of 90Sr is not too low. |
| format | Article |
| id | doaj-art-8e47c991db2b4553a8e22f39a1339dce |
| institution | DOAJ |
| issn | 0253-9950 |
| language | zho |
| publishDate | 2025-06-01 |
| publisher | Editorial Office of Journal of Nuclear and Radiochemistry |
| record_format | Article |
| series | He huaxue yu fangshe huaxue |
| spelling | doaj-art-8e47c991db2b4553a8e22f39a1339dce2025-08-20T03:23:27ZzhoEditorial Office of Journal of Nuclear and RadiochemistryHe huaxue yu fangshe huaxue0253-99502025-06-0147325926610.7538/hhx.2025.47.03.02592024-034A Quench Index for 90Y and Its New Applications in 90Sr AnalysisXiao-gui FENG0Jian-hua YUAN1Qian-ge HE2Xiao-jun JIN3Xue-yan KONG4Jian-chen WANG5Jing CHEN6Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaThe Second Filial Company of 404 Company Limited, China National Nuclear Corporation, Lanzhou 732850, ChinaThe Second Filial Company of 404 Company Limited, China National Nuclear Corporation, Lanzhou 732850, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaBased on the customized quench index qx for 90Y and the modified 2-window approach, a simple method has been developed to analyze 90Sr using a liquid scintillation spectrometer, sometimes supplemented by γ spectrometer. The liquid scintillation counting(LSC) spectrum of 90Y exhibits good linearity in the high-energy part, on the basis of which qx is defined. The key point of the modified 2-window approach is to obtain the ratio of the count rates of two windows(also known as region of interest, or ROI), CRH/CRW, where CRW is the count rate in ROIW, i.e. the whole region of interest(usually taken as channels 1-1024); CRH is the count rate in ROIH, i.e. the high-energy region of interest. The right endpoint of ROIH is usually fixed at channel 1024, and the left endpoint varies with the quenching level of the sample. This paper provides a method to select the left endpoint of ROIH and to keep the value of CRH/CRW about 0.2779, with the relative standard deviation of 0.84%. There are two prerequisites for using this method: (1) the quenching level of the sample is relatively low, in order that the counting efficiency of 90Sr or 90Y can be approximately considered as 100% in ROIW; (2) there is no interference from other nuclides than 90Y in ROIH. Three types of real samples from the hot test of high-level radioactive waste separation have been analyzed to show the specific steps of using this method. Because of the radioactive equilibrium of 90Sr/90Y in these samples, three ways of calculating the count rate of 90Sr have been adopted to verify each other. The first one is to obtain the count rate of 90Sr by subtracting the count rate of 90Y from the total count rate of 90Sr/90Y. The second one is just to let the count rate of 90Sr be equal to the count rate of 90Y. The third one is to divide the total count rate of 90Sr/90Y by 2 to obtain the count rate of 90Sr. The results indicate that the count rate of 90Sr obtained by this method is accurate and reliable. This method only requires linear fitting of the high-energy part of the LSC spectra. The method is simple and easy to use. With the application suggestions, users can choose appropriate analysis strategies according to the characteristics and analysis requirements of the sample. For analyzing 90Sr in samples of 90Sr/90Y with or without 137Cs, neither chemical separation nor waiting for the radioactive equilibrium of 90Sr/90Y is required, if the count rate of 90Sr is not too low.https://jnrc.xml-journal.net/cn/article/doi/10.7538/hhx.2025.47.03.0259lscquench indexmodified 2-window approachlinear fitting90sr90y |
| spellingShingle | Xiao-gui FENG Jian-hua YUAN Qian-ge HE Xiao-jun JIN Xue-yan KONG Jian-chen WANG Jing CHEN A Quench Index for 90Y and Its New Applications in 90Sr Analysis He huaxue yu fangshe huaxue lsc quench index modified 2-window approach linear fitting 90sr 90y |
| title | A Quench Index for 90Y and Its New Applications in 90Sr Analysis |
| title_full | A Quench Index for 90Y and Its New Applications in 90Sr Analysis |
| title_fullStr | A Quench Index for 90Y and Its New Applications in 90Sr Analysis |
| title_full_unstemmed | A Quench Index for 90Y and Its New Applications in 90Sr Analysis |
| title_short | A Quench Index for 90Y and Its New Applications in 90Sr Analysis |
| title_sort | quench index for 90y and its new applications in 90sr analysis |
| topic | lsc quench index modified 2-window approach linear fitting 90sr 90y |
| url | https://jnrc.xml-journal.net/cn/article/doi/10.7538/hhx.2025.47.03.0259 |
| work_keys_str_mv | AT xiaoguifeng aquenchindexfor90yanditsnewapplicationsin90sranalysis AT jianhuayuan aquenchindexfor90yanditsnewapplicationsin90sranalysis AT qiangehe aquenchindexfor90yanditsnewapplicationsin90sranalysis AT xiaojunjin aquenchindexfor90yanditsnewapplicationsin90sranalysis AT xueyankong aquenchindexfor90yanditsnewapplicationsin90sranalysis AT jianchenwang aquenchindexfor90yanditsnewapplicationsin90sranalysis AT jingchen aquenchindexfor90yanditsnewapplicationsin90sranalysis AT xiaoguifeng quenchindexfor90yanditsnewapplicationsin90sranalysis AT jianhuayuan quenchindexfor90yanditsnewapplicationsin90sranalysis AT qiangehe quenchindexfor90yanditsnewapplicationsin90sranalysis AT xiaojunjin quenchindexfor90yanditsnewapplicationsin90sranalysis AT xueyankong quenchindexfor90yanditsnewapplicationsin90sranalysis AT jianchenwang quenchindexfor90yanditsnewapplicationsin90sranalysis AT jingchen quenchindexfor90yanditsnewapplicationsin90sranalysis |