0000000000185464
AUTHOR
R. Magana Vsevolodovna
β -decay rates of Rh115,117 into Pd115,117 isotopes in the microscopic interacting boson-fermion model
The structure of odd-$A ^{115,117}\mathrm{Rh}$ and $^{115,117}\mathrm{Pd}$ isotopes is studied by means of the neutron-proton interacting boson-fermion model (IBFM-2). ${J}^{P}={\frac{1}{2}}^{+}$ quantum number assignment for the $^{115,117}\mathrm{Pd}$ ground states is critically discussed and the predicted energy levels are compared to the existing experimental data. The resulting nuclear wave functions are used to compute the $\ensuremath{\beta}$-decay $ft$ values of the transitions from $^{115,117}\mathrm{Rh}$ to $^{115,117}\mathrm{Pd}$ in the microscopic IBFM-2 and the results compared with the data.
Double charge exchange reactions as a probe for neutrinoless double beta decay nuclear matrix elements
Abstract The formalism to describe heavy-ion double charge exchange (DCE) processes in the eikonal and small-momentum transfer approximations introduced in Phys. Rev. C 98, 061601(R) (2018) is briefly discussed. It is also shown that, under the previous approximations, the heavy-ion DCE cross-section can be factorized in terms of a reaction and a nuclear part. A double charge exchange effective potential is explicitly derived in the closure approximation and also for the first time the explicit form of the DCE nuclear matrix elements, that are of the form of double Gamow-Teller and double Fermi. The recent hypothesis of a linear correlation between double Gamow-Teller neutrinoless double be…