First calculation of the γ γ decay width of a nuclear 2_{1}^{+} state: The case of ^{48}Ca
Abstract
The competitive doubleγ decay of the 2_{1}+^{ state of an eveneven spherical nucleus is studied for the first time. The coupling of one, two, and threephonon 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 γ γ /γ decay process and make a prediction for the branching ratio of the competitive γ γ decay relative to its single γ decay calculated to be 3 ×10 −8 for the case of 48Ca. }
 Publication:

Physical Review C
 Pub Date:
 August 2021
 DOI:
 10.1103/PhysRevC.104.024310
 Bibcode:
 2021PhRvC.104b4310S