Shell Model Studies of the Double Beta Decays of Ge-76, Se-82, and Xe-136

Jan, 1996
3 pages
Published in:
  • Phys.Rev.Lett. 77 (1996) 1954-1957
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Abstract:
The lifetimes for the double beta decays of  76~{76}Ge,  82~{82}Se and  136~{136}Xe are calculated using very large shell model spaces. The two neutrino matrix elements obtained are in good agreement with the present experimental data. For <mν><1<m_{\nu}><1 eV we predict the following upper bounds to the half-lives for the neutrinoless mode: T (0ν)1/2(Ge)>1.8510 25yr.T~{(0\nu)}_{1/2}(Ge) > 1.85\,10~{25} yr., T (0ν)1/2(Se)>2.3610 24yr.T~{(0\nu)}_{1/2}(Se) > 2.36\,10~{24} yr. and T (0ν)1/2(Xe)>1.2110 25yrT~{(0\nu)}_{1/2}(Xe) > 1.21\,10~{25} yr. These results are the first from a new generation of Shell Model calculations reaching O(10 8~{8}) dimensions.
  • 27.50.+e
  • 21.60.Cs
  • 27.60.+j
  • 23.40.Bw
  • double-beta decay: (0neutrino)
  • (0neutrino): double-beta decay
  • germanium
  • selenium
  • xenon
  • shell model