New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo
Abstract A new study of double beta decay processes in natural Zr isotopes using Zr metal samples and an ultra-low-background high-purity germanium detectors was performed at Laboratori Nazionali del Gran Sasso of INFN (Italy). Two data sets were collected with a 736.35 g and a 129.94 g Zr metal ove...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11516-9 |
| _version_ | 1797789553914806272 |
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| author | E. Celi M. Ješkovský M. Laubenstein S. S. Nagorny V. V. Nahorna S. Nisi L. Pagnanini P. Povinec P. Wang |
| author_facet | E. Celi M. Ješkovský M. Laubenstein S. S. Nagorny V. V. Nahorna S. Nisi L. Pagnanini P. Povinec P. Wang |
| author_sort | E. Celi |
| collection | DOAJ |
| description | Abstract A new study of double beta decay processes in natural Zr isotopes using Zr metal samples and an ultra-low-background high-purity germanium detectors was performed at Laboratori Nazionali del Gran Sasso of INFN (Italy). Two data sets were collected with a 736.35 g and a 129.94 g Zr metal over 59.7 days and 37.3 days, respectively, and were used for a detailed analysis. A new limit on the double beta decay of $$^{94}$$ 94 Zr to the 1st excited level of $$^{94}$$ 94 Mo was set as $$T_{1/2}^{\beta \beta } > 2.1\times 10^{20}~\text {year}$$ T 1 / 2 β β > 2.1 × 10 20 year , which is a factor of three better than the previous result. It is shown that the current radiopurity of Zr metal (tens of Bq/kg), produced via two methods, do not comply with the radiopurity requirements for low-background experiments. Hence, we propose to use a purified ZrCl $$_{4}$$ 4 powder in an optimized geometry as a new approach for future experiments with extended sensitivity focused on studies of rare nuclear processes in Zr isotopes. |
| first_indexed | 2024-03-13T01:52:19Z |
| format | Article |
| id | doaj.art-3b5fa2231e4f4d2695f00b01590c8acb |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-03-13T01:52:19Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-3b5fa2231e4f4d2695f00b01590c8acb2023-07-02T11:25:13ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-05-018351810.1140/epjc/s10052-023-11516-9New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 MoE. Celi0M. Ješkovský1M. Laubenstein2S. S. Nagorny3V. V. Nahorna4S. Nisi5L. Pagnanini6P. Povinec7P. Wang8Gran Sasso Science InstituteFaculty of Mathematics, Physics and Informatics, Comenius UniversityINFN-Laboratori Nazionali del Gran SassoDepartment of Physics, Engineering Physics and Astronomy, Queen’s UniversityDepartment of Chemistry, Queen’s UniversityINFN-Laboratori Nazionali del Gran SassoGran Sasso Science InstituteFaculty of Mathematics, Physics and Informatics, Comenius UniversityArthur B. McDonald Canadian Astroparticle Physics Research InstituteAbstract A new study of double beta decay processes in natural Zr isotopes using Zr metal samples and an ultra-low-background high-purity germanium detectors was performed at Laboratori Nazionali del Gran Sasso of INFN (Italy). Two data sets were collected with a 736.35 g and a 129.94 g Zr metal over 59.7 days and 37.3 days, respectively, and were used for a detailed analysis. A new limit on the double beta decay of $$^{94}$$ 94 Zr to the 1st excited level of $$^{94}$$ 94 Mo was set as $$T_{1/2}^{\beta \beta } > 2.1\times 10^{20}~\text {year}$$ T 1 / 2 β β > 2.1 × 10 20 year , which is a factor of three better than the previous result. It is shown that the current radiopurity of Zr metal (tens of Bq/kg), produced via two methods, do not comply with the radiopurity requirements for low-background experiments. Hence, we propose to use a purified ZrCl $$_{4}$$ 4 powder in an optimized geometry as a new approach for future experiments with extended sensitivity focused on studies of rare nuclear processes in Zr isotopes.https://doi.org/10.1140/epjc/s10052-023-11516-9 |
| spellingShingle | E. Celi M. Ješkovský M. Laubenstein S. S. Nagorny V. V. Nahorna S. Nisi L. Pagnanini P. Povinec P. Wang New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo European Physical Journal C: Particles and Fields |
| title | New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo |
| title_full | New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo |
| title_fullStr | New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo |
| title_full_unstemmed | New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo |
| title_short | New limit on $$^{94}$$ 94 Zr double beta decay to the 1st excited state of $$^{94}$$ 94 Mo |
| title_sort | new limit on 94 94 zr double beta decay to the 1st excited state of 94 94 mo |
| url | https://doi.org/10.1140/epjc/s10052-023-11516-9 |
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