Lepton capture rates due to isotopes of vanadium in astrophysical environment
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913790887460864 |
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| author | Shehzadi, Ramoona Nabi, Jameel-Un Farooq, Fakeha |
| author_facet | Shehzadi, Ramoona Nabi, Jameel-Un Farooq, Fakeha |
| contents | Lepton (electron and positron) capture rates on iron-regime nuclei are an essential element for modeling the late stages in the evolution of massive stars that end as core-collapse and thermonuclear supernovae. Previous simulation studies suggest that lepton capture (LC) rates on isotopes of vanadium have a substantial effect in regulating the electron fraction (Ye) during the final evolutionary phases. The present work involves the calculation of LC rates for 22 isotopes of vanadium using the proton-neutron quasiparticle random phase approximation (pn-QRPA) model. The considered mass range is from A = 43 to 64. The LC rates are computed over stellar densities ranging from 10^1 to 10^11 g/cm^3 and temperatures in the range 10^7 to 3 x 10^10 K. A comparison of our LC rates with those obtained using other models (IPM and LSSM) is also presented. Compared to other models, the pn-QRPA rates at high temperature (3 x 10^10 K) are larger by 1-2 orders of magnitude. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_09212 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Lepton capture rates due to isotopes of vanadium in astrophysical environment Shehzadi, Ramoona Nabi, Jameel-Un Farooq, Fakeha Nuclear Theory Lepton (electron and positron) capture rates on iron-regime nuclei are an essential element for modeling the late stages in the evolution of massive stars that end as core-collapse and thermonuclear supernovae. Previous simulation studies suggest that lepton capture (LC) rates on isotopes of vanadium have a substantial effect in regulating the electron fraction (Ye) during the final evolutionary phases. The present work involves the calculation of LC rates for 22 isotopes of vanadium using the proton-neutron quasiparticle random phase approximation (pn-QRPA) model. The considered mass range is from A = 43 to 64. The LC rates are computed over stellar densities ranging from 10^1 to 10^11 g/cm^3 and temperatures in the range 10^7 to 3 x 10^10 K. A comparison of our LC rates with those obtained using other models (IPM and LSSM) is also presented. Compared to other models, the pn-QRPA rates at high temperature (3 x 10^10 K) are larger by 1-2 orders of magnitude. |
| title | Lepton capture rates due to isotopes of vanadium in astrophysical environment |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2504.09212 |