Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model
We study the two-neutrino double electron capture on 124Xe based on an effective theory (ET) and large-scale shell model calculations, two modern nuclear structure approaches that have been tested against Gamow-Teller and double-beta decay data. In the ET, the low-energy constants are fit to electro...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-10-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319305994 |
| _version_ | 1819170096924327936 |
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| author | E.A. Coello Pérez J. Menéndez A. Schwenk |
| author_facet | E.A. Coello Pérez J. Menéndez A. Schwenk |
| author_sort | E.A. Coello Pérez |
| collection | DOAJ |
| description | We study the two-neutrino double electron capture on 124Xe based on an effective theory (ET) and large-scale shell model calculations, two modern nuclear structure approaches that have been tested against Gamow-Teller and double-beta decay data. In the ET, the low-energy constants are fit to electron capture and β− transitions around xenon. For the nuclear shell model, we use an interaction in a large configuration space that reproduces the spectroscopy of nuclei in this mass region. For the dominant transition to the 124Te ground state, we find half-lives T1/22νECEC=(1.3−18)×1022y for the ET and T1/22νECEC=(0.43−2.9)×1022y for the shell model. The ET uncertainty leads to a half-life almost entirely consistent with present experimental limits and largely within the reach of ongoing experiments. The shell model half-life range overlaps with the ET, but extends less beyond current limits. Our findings thus suggest that the two-neutrino double electron capture on 124Xe has a good chance to be discovered by ongoing or future experiments. In addition, we present results for the two-neutrino double electron capture to excited states of 124Te. |
| first_indexed | 2024-12-22T19:29:58Z |
| format | Article |
| id | doaj.art-1e07df871a4948a9b50196a3693f709b |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-22T19:29:58Z |
| publishDate | 2019-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-1e07df871a4948a9b50196a3693f709b2022-12-21T18:15:08ZengElsevierPhysics Letters B0370-26932019-10-01797Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell modelE.A. Coello Pérez0J. Menéndez1A. Schwenk2Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; ExtreMe Matter Institute EMMI, Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; Corresponding author.Center for Nuclear Study, The University of Tokyo, Tokyo 113-0033, JapanInstitut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; ExtreMe Matter Institute EMMI, Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany; Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, GermanyWe study the two-neutrino double electron capture on 124Xe based on an effective theory (ET) and large-scale shell model calculations, two modern nuclear structure approaches that have been tested against Gamow-Teller and double-beta decay data. In the ET, the low-energy constants are fit to electron capture and β− transitions around xenon. For the nuclear shell model, we use an interaction in a large configuration space that reproduces the spectroscopy of nuclei in this mass region. For the dominant transition to the 124Te ground state, we find half-lives T1/22νECEC=(1.3−18)×1022y for the ET and T1/22νECEC=(0.43−2.9)×1022y for the shell model. The ET uncertainty leads to a half-life almost entirely consistent with present experimental limits and largely within the reach of ongoing experiments. The shell model half-life range overlaps with the ET, but extends less beyond current limits. Our findings thus suggest that the two-neutrino double electron capture on 124Xe has a good chance to be discovered by ongoing or future experiments. In addition, we present results for the two-neutrino double electron capture to excited states of 124Te.http://www.sciencedirect.com/science/article/pii/S0370269319305994 |
| spellingShingle | E.A. Coello Pérez J. Menéndez A. Schwenk Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model Physics Letters B |
| title | Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model |
| title_full | Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model |
| title_fullStr | Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model |
| title_full_unstemmed | Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model |
| title_short | Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model |
| title_sort | two neutrino double electron capture on 124xe based on an effective theory and the nuclear shell model |
| url | http://www.sciencedirect.com/science/article/pii/S0370269319305994 |
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