Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter

We improve the results for the β⁻-decay rates obtained within the context of the Gross Theory of Beta Decay (GTBD) by using new values of the parameter σ<sub>N</sub> related to the standard deviation for the Gamow-Teller resonance: we include experimental data when they are available and...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Rocha de Azevedo, M., Ferreira, R. C., Barbero, César Alberto
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Ciencias Exactas
Física
Beta decay
Adjustment parameters
Gross theory of beta decay
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/130713
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-130713
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Beta decay
Adjustment parameters
Gross theory of beta decay
spellingShingle Ciencias Exactas
Física
Beta decay
Adjustment parameters
Gross theory of beta decay
Rocha de Azevedo, M.
Ferreira, R. C.
Barbero, César Alberto
Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter
topic_facet Ciencias Exactas
Física
Beta decay
Adjustment parameters
Gross theory of beta decay
description We improve the results for the β⁻-decay rates obtained within the context of the Gross Theory of Beta Decay (GTBD) by using new values of the parameter σ<sub>N</sub> related to the standard deviation for the Gamow-Teller resonance: we include experimental data when they are available and, if not, we adopt the value of the nearest neighbor previous (that is, with less mass) that has experimental data. We evaluate the β⁻-decay rates using a Gaussian energy distribution function with the axial-vector weak coupling constant |g<sub>A</sub>| = 1, considering updated experimental mass defects and also an improved approximation for the Fermi function. Our sample consists of 94 nuclei with mass in the range 46 < A < 70, all of them decaying by means of allowed transitions, which are of interest in the pre-supernova phase and have experimental data in terrestrial conditions available in the Letter of Nuclides. We compare our result with those obtained within the same GTBD but using values of σ<sub>N</sub> adjusted in Possidonio (<i>Braz. J. Phys.</i> 48:485, 2018) by minimizing the χ²-function, and also with systematic microscopic calculations. We have shown that the substitution of the adjusted parameters by experimental data in GTBD improves the results for β⁻-decay rates by 6.4%.
format Articulo
Articulo
author Rocha de Azevedo, M.
Ferreira, R. C.
Barbero, César Alberto
author_facet Rocha de Azevedo, M.
Ferreira, R. C.
Barbero, César Alberto
author_sort Rocha de Azevedo, M.
title Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter
title_short Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter
title_full Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter
title_fullStr Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter
title_full_unstemmed Beta Decay Rates Evaluated Within the Gross Theory Using Experimental Data for the Gamow-Teller Resonance Parameter
title_sort beta decay rates evaluated within the gross theory using experimental data for the gamow-teller resonance parameter
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/130713
work_keys_str_mv AT rochadeazevedom betadecayratesevaluatedwithinthegrosstheoryusingexperimentaldataforthegamowtellerresonanceparameter
AT ferreirarc betadecayratesevaluatedwithinthegrosstheoryusingexperimentaldataforthegamowtellerresonanceparameter
AT barberocesaralberto betadecayratesevaluatedwithinthegrosstheoryusingexperimentaldataforthegamowtellerresonanceparameter
bdutipo_str Repositorios
_version_ 1764820452713168896

Ejemplares similares