Microscopic calculation of decay half-lives with atomic numbers Z = 10–30

Spin–isospin excitations and half-lives of medium-mass deformed nuclei

“…This is consistent with the trend observed in Fig. 1 of Homma et al [6] that shows that for decreasing values of χ ph GT one needs smaller values of κ pp GT . On the other hand, a discussion of the adequacy of our ph strength is also demonstrated in Ref.…”

“…This interaction contains two parts. The particle-hole part is responsible for the position and structure of the GT resonance [6,11] and is derived selfconsistently from the same energy density functional (and Skyrme interaction) as the HF equation, in terms of the second derivatives of the energy density functional with respect to the one-body densities [22]. The residual interaction is finally written in a separable form by averaging the Landau-Migdal resulting force over the nuclear volume,…”

“…The peak of the GT resonance is almost insensitive to the pp force and κ pp GT is usually adjusted to reproduce the half-lives [6]. However, one should be careful with the choice of this coupling constant.…”

Gamow-Teller strength distributions in Xe isotopes

“…The corresponding coupling constant χ GT ph is obtained in a consistent way from the same energy density functional as the Hartree-Fock mean field through a second derivative with respect to the nucleonic density and by averaging the contact interaction over the nuclear volume [12]. The pp part consists of a proton-neutron pairing force, which we introduce as a separable force [17,19,20],…”

“…This implies that the particle-particle interaction in the protonneutron channel is in principle undetermined. Therefore the 054308-2 coupling constant κ GT pp is fitted to the phenomenology, as for example to reproduce half-lives as is usually done [17,18].…”