First limits on double beta decays in $$^\mathbf{232}$$ 232 Th
Abstract As one of the primordial radioactive isotopes, $$^{232}\mathrm{Th}$$ 232Th mainly undergoes $$\alpha $$ α -decay with a half-life of $$1.402\cdot 10^{10}$$ 1.402·1010 years. However, it is also one of 35 double beta decay candidates in which the single $$\beta $$ β -decay is forbidden or s...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-08-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-8281-3 |
| _version_ | 1818340985316311040 |
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| author | M. Laubenstein B. Lehnert S. S. Nagorny |
| author_facet | M. Laubenstein B. Lehnert S. S. Nagorny |
| author_sort | M. Laubenstein |
| collection | DOAJ |
| description | Abstract As one of the primordial radioactive isotopes, $$^{232}\mathrm{Th}$$ 232Th mainly undergoes $$\alpha $$ α -decay with a half-life of $$1.402\cdot 10^{10}$$ 1.402·1010 years. However, it is also one of 35 double beta decay candidates in which the single $$\beta $$ β -decay is forbidden or strongly suppressed. 181 mg of thorium contained in a gas mantle were measured in a HPGe well-detector at the Gran Sasso Underground Laboratory with a total exposure of 3.25 g$$\times $$ × d. We obtain half-life limits on all double beta decay modes of $$^{232}\mathrm{Th}$$ 232Th to excited states of $$^{232}\mathrm{U}$$ 232U on the order of $$10^{11-15}$$ 1011-15 years. For the most likely transition into the 0$$^+_1$$ 1+ state we find a lower half-life limit of $$6.7\cdot 10^{14}$$ 6.7·1014 years (90% C.I.). These are the first constraints on double beta decay excited state transition in $$^{232}\mathrm{Th}$$ 232Th . |
| first_indexed | 2024-12-13T15:51:36Z |
| format | Article |
| id | doaj.art-8abe7171346c4d5799c2f8f059e36e10 |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-13T15:51:36Z |
| publishDate | 2020-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-8abe7171346c4d5799c2f8f059e36e102022-12-21T23:39:28ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-08-018081610.1140/epjc/s10052-020-8281-3First limits on double beta decays in $$^\mathbf{232}$$ 232 ThM. Laubenstein0B. Lehnert1S. S. Nagorny2INFN-Laboratori Nazionali del Gran SassoNuclear Science Division, Lawrence Berkeley National LaboratoryPhysics Department, Queen’s UniversityAbstract As one of the primordial radioactive isotopes, $$^{232}\mathrm{Th}$$ 232Th mainly undergoes $$\alpha $$ α -decay with a half-life of $$1.402\cdot 10^{10}$$ 1.402·1010 years. However, it is also one of 35 double beta decay candidates in which the single $$\beta $$ β -decay is forbidden or strongly suppressed. 181 mg of thorium contained in a gas mantle were measured in a HPGe well-detector at the Gran Sasso Underground Laboratory with a total exposure of 3.25 g$$\times $$ × d. We obtain half-life limits on all double beta decay modes of $$^{232}\mathrm{Th}$$ 232Th to excited states of $$^{232}\mathrm{U}$$ 232U on the order of $$10^{11-15}$$ 1011-15 years. For the most likely transition into the 0$$^+_1$$ 1+ state we find a lower half-life limit of $$6.7\cdot 10^{14}$$ 6.7·1014 years (90% C.I.). These are the first constraints on double beta decay excited state transition in $$^{232}\mathrm{Th}$$ 232Th .http://link.springer.com/article/10.1140/epjc/s10052-020-8281-3 |
| spellingShingle | M. Laubenstein B. Lehnert S. S. Nagorny First limits on double beta decays in $$^\mathbf{232}$$ 232 Th European Physical Journal C: Particles and Fields |
| title | First limits on double beta decays in $$^\mathbf{232}$$ 232 Th |
| title_full | First limits on double beta decays in $$^\mathbf{232}$$ 232 Th |
| title_fullStr | First limits on double beta decays in $$^\mathbf{232}$$ 232 Th |
| title_full_unstemmed | First limits on double beta decays in $$^\mathbf{232}$$ 232 Th |
| title_short | First limits on double beta decays in $$^\mathbf{232}$$ 232 Th |
| title_sort | first limits on double beta decays in mathbf 232 232 th |
| url | http://link.springer.com/article/10.1140/epjc/s10052-020-8281-3 |
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