Gamow–Teller β+ Decay of DeformedNuclei with 62 ≤ Z ≤ 70 near the Proton DripLine

Abstract

The distribution of the Gamow–Teller (GT) β+strength is estimated for both oblate and prolate Hartree–Fock(HF) local minima for even-even nuclei with 62 ≤ Z ≤ 70near the proton drip line, using the quasiparticle Tamm–Dancoffapproximation (TDA) based on a deformed HF + BCS calculation with Skyrmeinteraction. The prolate local minima and the oblate local minima lieenergetically close for these nuclei. Almost all the GT strength liesbelow the ground state of the mother nuclei in this region. The GTstrength distribution is not sensitive to deformation. For theisotones N = 74 and N = 76 close to the proton drip linethe total GT strength is always larger for the prolate shape than theoblate shape. Approaching the proton drip line the total GT strengthincreases.