Study of cosmogenic activation in copper for rare event search experiments
Abstract Rare event search experiments using germanium detectors are performed in underground laboratories to minimize the background induced by cosmic rays. However, the cosmogenic activation of cupreous detector components on the ground generates long half-life radioisotopes and contributes to the...
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2021
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oai:doaj.org-article:8712cdbffb044d05b26920a5c5934b482021-11-28T12:11:47ZStudy of cosmogenic activation in copper for rare event search experiments10.1140/epjc/s10052-021-09827-w1434-60441434-6052https://doaj.org/article/8712cdbffb044d05b26920a5c5934b482021-11-01T00:00:00Zhttps://doi.org/10.1140/epjc/s10052-021-09827-whttps://doaj.org/toc/1434-6044https://doaj.org/toc/1434-6052Abstract Rare event search experiments using germanium detectors are performed in underground laboratories to minimize the background induced by cosmic rays. However, the cosmogenic activation of cupreous detector components on the ground generates long half-life radioisotopes and contributes to the background level. We measured cosmogenic activation with 142.50 kg of copper bricks after 504 days of exposure at an altitude of 2469.4 m outside the China Jinping Underground Laboratory (CJPL). The specific activities of the cosmogenic nuclides produced in the copper bricks were measured using a low-background germanium gamma-ray spectrometer at CJPL. The production rates at sea level, in units of nuclei/kg/day, were $${18.6 \pm 2.0}$$ 18.6 ± 2.0 for $${^{54}}$$ 54 Mn, $${9.9 \pm 1.3}$$ 9.9 ± 1.3 for $${^{56}}$$ 56 Co, $${48.3 \pm 5.5}$$ 48.3 ± 5.5 for $${^{57}}$$ 57 Co, $${51.8 \pm 2.5}$$ 51.8 ± 2.5 for $${^{58}}$$ 58 Co, and $${39.7 \pm 5.7}$$ 39.7 ± 5.7 for $${^{60}}$$ 60 Co. The measurement will help to constrain cosmogenic background estimation for rare event searches using copper as a detector structure and shielding material. Based on the measured production rates, the impact of the cosmogenic background in cupreous components of germanium detectors on the next generation CDEX-100 experiment was assessed with the expected exposure history above ground.Ze SheZhi ZengHao MaQian YueMingkun JingJianping ChengJunli LiHui ZhangSpringerOpenarticleAstrophysicsQB460-466Nuclear and particle physics. Atomic energy. RadioactivityQC770-798ENEuropean Physical Journal C: Particles and Fields, Vol 81, Iss 11, Pp 1-6 (2021) |
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Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 |
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Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Ze She Zhi Zeng Hao Ma Qian Yue Mingkun Jing Jianping Cheng Junli Li Hui Zhang Study of cosmogenic activation in copper for rare event search experiments |
| description |
Abstract Rare event search experiments using germanium detectors are performed in underground laboratories to minimize the background induced by cosmic rays. However, the cosmogenic activation of cupreous detector components on the ground generates long half-life radioisotopes and contributes to the background level. We measured cosmogenic activation with 142.50 kg of copper bricks after 504 days of exposure at an altitude of 2469.4 m outside the China Jinping Underground Laboratory (CJPL). The specific activities of the cosmogenic nuclides produced in the copper bricks were measured using a low-background germanium gamma-ray spectrometer at CJPL. The production rates at sea level, in units of nuclei/kg/day, were $${18.6 \pm 2.0}$$ 18.6 ± 2.0 for $${^{54}}$$ 54 Mn, $${9.9 \pm 1.3}$$ 9.9 ± 1.3 for $${^{56}}$$ 56 Co, $${48.3 \pm 5.5}$$ 48.3 ± 5.5 for $${^{57}}$$ 57 Co, $${51.8 \pm 2.5}$$ 51.8 ± 2.5 for $${^{58}}$$ 58 Co, and $${39.7 \pm 5.7}$$ 39.7 ± 5.7 for $${^{60}}$$ 60 Co. The measurement will help to constrain cosmogenic background estimation for rare event searches using copper as a detector structure and shielding material. Based on the measured production rates, the impact of the cosmogenic background in cupreous components of germanium detectors on the next generation CDEX-100 experiment was assessed with the expected exposure history above ground. |
| format |
article |
| author |
Ze She Zhi Zeng Hao Ma Qian Yue Mingkun Jing Jianping Cheng Junli Li Hui Zhang |
| author_facet |
Ze She Zhi Zeng Hao Ma Qian Yue Mingkun Jing Jianping Cheng Junli Li Hui Zhang |
| author_sort |
Ze She |
| title |
Study of cosmogenic activation in copper for rare event search experiments |
| title_short |
Study of cosmogenic activation in copper for rare event search experiments |
| title_full |
Study of cosmogenic activation in copper for rare event search experiments |
| title_fullStr |
Study of cosmogenic activation in copper for rare event search experiments |
| title_full_unstemmed |
Study of cosmogenic activation in copper for rare event search experiments |
| title_sort |
study of cosmogenic activation in copper for rare event search experiments |
| publisher |
SpringerOpen |
| publishDate |
2021 |
| url |
https://doaj.org/article/8712cdbffb044d05b26920a5c5934b48 |
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