A novel method for stellar electron-capture rates of excited nuclear states
We propose a novel shell-model method to calculate stellar electron-capture (EC) rates of highly-excited nuclear states. This method is based on the Projected Shell Model that can incorporate high-order multi-quasiparticle configurations in a large model space. By taking the EC calculation from 59Co...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-06-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320302367 |
| _version_ | 1818527026416451584 |
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| author | Liang Tan Yi-Xiu Liu Long-Jun Wang Zhipan Li Yang Sun |
| author_facet | Liang Tan Yi-Xiu Liu Long-Jun Wang Zhipan Li Yang Sun |
| author_sort | Liang Tan |
| collection | DOAJ |
| description | We propose a novel shell-model method to calculate stellar electron-capture (EC) rates of highly-excited nuclear states. This method is based on the Projected Shell Model that can incorporate high-order multi-quasiparticle configurations in a large model space. By taking the EC calculation from 59Co to 59Fe as the first example, we study the effects of nuclear excitations (including both single-particle and collective excitations) on the stellar EC rates. It is found that the predicted EC rates exhibit large variations as functions of excitations in both parent and daughter nuclei, which sensitively depend on the density and temperature in the stellar environment. We emphasize the importance of inclusion of multi-quasiparticle configurations constructed in a large model space for the calculation of EC rates used in astrophysical studies. |
| first_indexed | 2024-12-11T06:30:48Z |
| format | Article |
| id | doaj.art-c6835c2270de431c80ba2761e58c3caf |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-11T06:30:48Z |
| publishDate | 2020-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-c6835c2270de431c80ba2761e58c3caf2022-12-22T01:17:31ZengElsevierPhysics Letters B0370-26932020-06-01805A novel method for stellar electron-capture rates of excited nuclear statesLiang Tan0Yi-Xiu Liu1Long-Jun Wang2Zhipan Li3Yang Sun4School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaSchool of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaSchool of Physical Science and Technology, Southwest University, Chongqing 400715, China; Corresponding author.School of Physical Science and Technology, Southwest University, Chongqing 400715, ChinaSchool of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, ChinaWe propose a novel shell-model method to calculate stellar electron-capture (EC) rates of highly-excited nuclear states. This method is based on the Projected Shell Model that can incorporate high-order multi-quasiparticle configurations in a large model space. By taking the EC calculation from 59Co to 59Fe as the first example, we study the effects of nuclear excitations (including both single-particle and collective excitations) on the stellar EC rates. It is found that the predicted EC rates exhibit large variations as functions of excitations in both parent and daughter nuclei, which sensitively depend on the density and temperature in the stellar environment. We emphasize the importance of inclusion of multi-quasiparticle configurations constructed in a large model space for the calculation of EC rates used in astrophysical studies.http://www.sciencedirect.com/science/article/pii/S0370269320302367Stellar electron-capture ratesGamow-Teller transitionsSingle-particle excitationsCollective excitationsProjected shell model |
| spellingShingle | Liang Tan Yi-Xiu Liu Long-Jun Wang Zhipan Li Yang Sun A novel method for stellar electron-capture rates of excited nuclear states Physics Letters B Stellar electron-capture rates Gamow-Teller transitions Single-particle excitations Collective excitations Projected shell model |
| title | A novel method for stellar electron-capture rates of excited nuclear states |
| title_full | A novel method for stellar electron-capture rates of excited nuclear states |
| title_fullStr | A novel method for stellar electron-capture rates of excited nuclear states |
| title_full_unstemmed | A novel method for stellar electron-capture rates of excited nuclear states |
| title_short | A novel method for stellar electron-capture rates of excited nuclear states |
| title_sort | novel method for stellar electron capture rates of excited nuclear states |
| topic | Stellar electron-capture rates Gamow-Teller transitions Single-particle excitations Collective excitations Projected shell model |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320302367 |
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