Phys.Rev. C 93, 014305 (2016)

J.Menendez, No.Hinohara, J.Engel, G.Martinez-Pinedo, T.R.Rodriguez

Testing the importance of collective correlations in neutrinoless ββ decay

RADIOACTIVITY ^{42,44,46,48,50,52,54,56,58,60}Ca, ^{44,46,48,50,52,54,56,58}Ti, ^{46,48,50,52,54,56,58,60}Cr(2β^-); calculated Gamow-Teller part of the 0νββ decay matrix elements, percentage of ground state in daughter nuclei belonging to SU(4) irreducible representations using shell model with KB3G interaction, full collective interaction H_coll, H_coll with the quadrupole-quadrupole term removed, H_coll with the isoscalar pairing term removed, and H_coll with both the isoscalar-pairing and spin-isospin removed. ⁴⁸Ca, ⁷⁶Ge, ⁸²Se, ¹²⁴Sn, ¹³⁰Te, ¹³⁶Xe(2β^-); calculated Gamow-Teller matrix elements for 0νββ decay and estimated effect of isoscalar pairing. Role of collective correlations in 0νββ decay. Comparison of GCM calculations for fp shell nuclei with full shell-model calculations.

NUCLEAR STRUCTURE ^{46,48,50,52,54,56,58,60}Cr; calculated B(E2) for first 2+ states using shell model with KB3G interaction, full collective interaction H_coll, and by H_coll without the quadrupole-quadrupole part. Comparison with experimental values.

doi: 10.1103/PhysRevC.93.014305