Electron and Positron Capture Rates on 55Co in Stellar Matter
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2007
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| _version_ | 1876478443274633216 |
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| author | Jameel-Un Nabi |
| author_facet | Jameel-Un Nabi |
| contents | Electron and Positron Capture Rates on 55Co in Stellar Matter Jameel-Un Nabi Muneeb-Ur Rahman Muhammad Sajjad Física, Astronomía y Matemáticas pn Co Gamow QRPA theory Brinks hypothesis Co is not only present in abundance in presupernova phase but is also advocated to play a decisive rolein the core collapse of massive stars. The spectroscopy of electron capture and emitted neutrinos yields usefulinformation on the physical conditions and stellar core composition. B(GT) values to low-lying states arecalculated microscopically using the pn-QRPA theory. Our rates are enhanced compared to the reported shellmodel rates. The enhancement is attributed partly to the liberty of selecting a huge model space, allowingconsideration of many more excited states in our rate calculations. Unlike previous calculations the so-calledBrinks hypothesis is not assumed leading to a more realistic estimate of the rates. The electron and positroncapture rates are calculated over a wide temperature (0:01£109 ¡30£109K) and density (10¡1011gcm¡3) grid. 2007 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46437809 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4 Vol.37 |
| format | Artículo científico |
| id | redalyc_46437809 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Electron and Positron Capture Rates on 55Co in Stellar Matter Jameel-Un Nabi Física, Astronomía y Matemáticas pn Co Gamow QRPA theory Brinks hypothesis Electron and Positron Capture Rates on 55Co in Stellar Matter Jameel-Un Nabi Muneeb-Ur Rahman Muhammad Sajjad Física, Astronomía y Matemáticas pn Co Gamow QRPA theory Brinks hypothesis Co is not only present in abundance in presupernova phase but is also advocated to play a decisive rolein the core collapse of massive stars. The spectroscopy of electron capture and emitted neutrinos yields usefulinformation on the physical conditions and stellar core composition. B(GT) values to low-lying states arecalculated microscopically using the pn-QRPA theory. Our rates are enhanced compared to the reported shellmodel rates. The enhancement is attributed partly to the liberty of selecting a huge model space, allowingconsideration of many more excited states in our rate calculations. Unlike previous calculations the so-calledBrinks hypothesis is not assumed leading to a more realistic estimate of the rates. The electron and positroncapture rates are calculated over a wide temperature (0:01£109 ¡30£109K) and density (10¡1011gcm¡3) grid. 2007 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46437809 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4 Vol.37 |
| title | Electron and Positron Capture Rates on 55Co in Stellar Matter |
| topic | Física, Astronomía y Matemáticas pn Co Gamow QRPA theory Brinks hypothesis |
| url | https://www.redalyc.org/articulo.oa?id=46437809 |