https://doi.org/10.1140/epja/i2007-10481-7
Regular Article - Theoretical Physics
Nuclear deformation and the two-neutrino double- β decay in 124, 126Xe , 128, 130Te , 130, 132Ba and 150Nd isotopes
1
Department of Physics, University of Lucknow, 226007, Lucknow, India
2
Department of Physics and Meteorology, IIT, 721302, Kharagpur, India
3
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A.P. 70-543, 04510 D.F., México, Mexico
* e-mail: pkrath_lu@yahoo.co.in
Received:
21
June
2007
Accepted:
11
August
2007
Published online:
7
September
2007
The two-neutrino double-beta decay of 124, 126Xe , 128, 130Te , 130, 132Ba and 150Nd isotopes is studied in the Projected Hartree-Fock-Bogoliubov (PHFB) model. Theoretical 2ν β-β- half-lives of 128, 130Te , and 150Nd isotopes, and 2ν β+β+ , 2ν β+ EC and 2ν ECEC for 124, 126Xe and 130, 132Ba nuclei are presented. Calculated quadrupolar transition probabilities B(E2 : 0+ → 2+) , static quadrupole moments and g -factors in the parent and daughter nuclei reproduce the experimental information, validating the reliability of the model wave functions. The anticorrelation between nuclear deformation and the nuclear transition matrix element M 2ν is confirmed.
PACS: 23.40.Hc Relation with nuclear matrix elements and nuclear structure – / 21.60.Jz Hartree-Fock and random-phase approximations – / 23.20.-g Electromagnetic transitions – / 27.60.+j 90 ⩽ A ⩽ 149 –
© Società Italiana di Fisica and Springer-Verlag, 2007
