Abstract
The competitive double- decay of the state of an even-even spherical nucleus is studied for the first time. The coupling of one-, two-, and three-phonon terms in the wave functions of excited states is taken into account within the microscopic model based on the Skyrme energy density functional. The approach enables one to perform the calculations in very large configurational spaces. We estimate the generalized electric dipole polarizabilities involved in the decay process and make a prediction for the branching ratio of the competitive -decay relative to its single -decay calculated to be for the case of .
- Received 20 July 2020
- Revised 1 June 2021
- Accepted 22 July 2021
DOI:https://doi.org/10.1103/PhysRevC.104.024310
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