Weak Magnetism in Two Neutrino Double Beta Decay

We have extended the formalism for the two-neutrino double beta decay by including the weak-agnetism term, as well as other second-forbidden corrections. The weak magnetism diminishes the calculated half-lives in ∼ 10%, independently of the nuclear structure. Numerical computations were performed wi...

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Autores principales: Barbero, César Alberto, Krmpotić, Francisco, Mariano, Alejandro Edgardo, Tadić, Dubravko
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Exactas
Física
Magnetism
Neutrino
Double beta decay
Nuclear structure
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123012
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123012
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
Magnetism
Neutrino
Double beta decay
Nuclear structure
spellingShingle Ciencias Exactas
Física
Magnetism
Neutrino
Double beta decay
Nuclear structure
Barbero, César Alberto
Krmpotić, Francisco
Mariano, Alejandro Edgardo
Tadić, Dubravko
Weak Magnetism in Two Neutrino Double Beta Decay
topic_facet Ciencias Exactas
Física
Magnetism
Neutrino
Double beta decay
Nuclear structure
description We have extended the formalism for the two-neutrino double beta decay by including the weak-agnetism term, as well as other second-forbidden corrections. The weak magnetism diminishes the calculated half-lives in ∼ 10%, independently of the nuclear structure. Numerical computations were performed within the pn-QRPA, for <sup>76</sup>Ge, <sup>82</sup>Se, <sup>100</sup>Mo, <sup>128</sup>T e and <sup>130</sup>T e nuclei. No one of the second-forbidden corrections modifies significantly the spectrum shapes. The total reduction in the calculated half lives varies from 6% up to 32%, and strongly depend on the nuclear interaction in the particle-particle S = 1, T = 0 channel. We conclude that the higher order effects in the weak Hamiltonian would hardly be observed in the two-neutrino double beta experiments.
format Articulo
Articulo
author Barbero, César Alberto
Krmpotić, Francisco
Mariano, Alejandro Edgardo
Tadić, Dubravko
author_facet Barbero, César Alberto
Krmpotić, Francisco
Mariano, Alejandro Edgardo
Tadić, Dubravko
author_sort Barbero, César Alberto
title Weak Magnetism in Two Neutrino Double Beta Decay
title_short Weak Magnetism in Two Neutrino Double Beta Decay
title_full Weak Magnetism in Two Neutrino Double Beta Decay
title_fullStr Weak Magnetism in Two Neutrino Double Beta Decay
title_full_unstemmed Weak Magnetism in Two Neutrino Double Beta Decay
title_sort weak magnetism in two neutrino double beta decay
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/123012
work_keys_str_mv AT barberocesaralberto weakmagnetismintwoneutrinodoublebetadecay
AT krmpoticfrancisco weakmagnetismintwoneutrinodoublebetadecay
AT marianoalejandroedgardo weakmagnetismintwoneutrinodoublebetadecay
AT tadicdubravko weakmagnetismintwoneutrinodoublebetadecay
bdutipo_str Repositorios
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