scholarly journals Realistic shell model description of beta decay

2018 ◽  
Vol 194 ◽  
pp. 02007
Author(s):  
Angela Gargano ◽  
Luigi Coraggio ◽  
Luca De Angelis ◽  
Tokuro Fukui ◽  
Nunzio Itaco
Keyword(s):  
Shell Model ◽  
Beta Decay ◽  
Electric Quadrupole ◽  
Double Beta Decay ◽  
Model Description ◽  
Β Decay ◽  
Decay Properties ◽  
Model Study ◽  
Many Body Perturbation Theory ◽  
Transition Operators

In this paper, we extend our previous realistic shell-model study of Gamow-Teller strengths and double-β decay properties for nuclei around 132Sn to lighter mass nuclei. The effective shell-model Hamiltonian and transition operators are microscopically derived by way of many-body perturbation theory, without resorting to empirical parameters. Our main aim is to further check the reliability of our approach and verify its stability in other mass regions. Calculated energy spectra as well as electric-quadrupole and β-decay properties are presented for 76Ge and 82Se and compared with the experimental data, together with some results for 130Te and 136Xe already reported in our previous paper. Finally, some preliminary results of nuclear matrix elements responsible for the neutrinoless double beta decay, calculated by using the bare operator, are shown.

scholarly journals Neutrinoless Double-beta Decay Rates Around Mass 80 In The Nuclear Shell Model

2017 ◽  
Author(s):  
Kota Yanase ◽  
Naotaka Yoshinaga ◽  
Koji Higashiyama ◽  
Eri Teruya ◽  
Daisuke Taguchi
Keyword(s):  
Shell Model ◽  
Beta Decay ◽  
Neutrinoless Double Beta Decay ◽  
Decay Rates ◽  
Double Beta Decay ◽  
Nuclear Shell Model ◽  
Nuclear Shell

scholarly journals Results from the Cuore Experiment †

Universe ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 10 ◽  
Author(s):  
Alessio Caminata ◽  
Douglas Adams ◽  
Chris Alduino ◽  
Krystal Alfonso ◽  
Frank Avignone ◽  
...  
Keyword(s):  
Beta Decay ◽  
Energy Resolution ◽  
Half Life ◽  
Precise Measurement ◽  
Region Of Interest ◽  
Neutrinoless Double Beta Decay ◽  
Double Beta Decay ◽  
Effective Energy ◽  
Β Decay ◽  
Compact Structure

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO 2 crystals arranged in a cylindrical compact structure of 19 towers, each of them made of 52 crystals. The construction of the experiment was completed in August 2016 and the data taking started in spring 2017 after a period of commissioning and tests. In this work we present the neutrinoless double beta decay results of CUORE from examining a total TeO 2 exposure of 86.3 kg yr , characterized by an effective energy resolution of 7.7 keV FWHM and a background in the region of interest of 0.014 counts / ( keV kg yr ) . In this physics run, CUORE placed a lower limit on the decay half-life of neutrinoless double beta decay of 130 Te > 1.3 · 10 25 yr (90% C.L.). Moreover, an analysis of the background of the experiment is presented as well as the measurement of the 130 Te 2 ν β β decay with a resulting half-life of T 1 / 2 2 ν = [ 7.9 ± 0.1 ( stat . ) ± 0.2 ( syst . ) ] × 10 20 yr which is the most precise measurement of the half-life and compatible with previous results.

scholarly journals Two-neutrino Double-Beta Decay within the Realistic Shell Model

2018 ◽  
Vol 1056 ◽  
pp. 012012 ◽  
Author(s):  
L Coraggio ◽  
L De Angelis ◽  
T Fukui ◽  
A Gargano ◽  
N Itaco
Keyword(s):  
Shell Model ◽  
Beta Decay ◽  
Double Beta Decay

scholarly journals THE GAMOW-TELLER RESPONSE IN DEFORMED NUCLEI

2006 ◽  
Vol 15 (07) ◽  
pp. 1397-1406 ◽  
Author(s):  
P. SARRIGUREN ◽  
R. ÁLVAREZ-RODRÍGUEZ ◽  
O. MORENO ◽  
E. MOYA DE GUERRA
Keyword(s):  
Nuclear Astrophysics ◽  
Double Beta Decay ◽  
Β Decay ◽  
Hartree Fock ◽  
Decay Properties ◽  
Medium Mass ◽  
Deformation Dependence ◽  
Gamow Teller ◽  
Strength Distributions

We study Gamow-Teller strength distributions within a QRPA approach performed on top of a deformed Skyrme-Hartree-Fock+BCS single particle basis with the inclusion of residual spin-isospin interactions in both particle-hole and particle-particle channels. We focus our attention in several problems of interest in Nuclear Structure and Nuclear Astrophysics, such as the β-decay properties of proton-rich medium-mass nuclei of astrophysical interest and the deformation dependence of the Gamow-Teller strength distributions in neutron deficient Pb isotopes. We also discuss the role of deformation in the two-neutrino double beta decay.

Shell-model study of the highly forbidden beta decay 48 Ca → 48 Sc

1999 ◽  
Vol 46 (5) ◽  
pp. 577-582 ◽  
Author(s):  
M Aunola ◽  
J Suhonen ◽  
T Siiskonen
Keyword(s):  
Shell Model ◽  
Beta Decay ◽  
Model Study

Shell-model and QRPA treatments of double beta decay

1988 ◽  
Vol 208 (2) ◽  
pp. 187-193 ◽  
Author(s):  
J. Engel ◽  
P. Vogel ◽  
O. Civitarese ◽  
M.R. Zirnbauer
Keyword(s):  
Shell Model ◽  
Beta Decay ◽  
Double Beta Decay
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