Speaker
Description
We offer a comprehensive investigation of electron capture ratios, spanning a wide range of atomic numbers. Our study utilizes a self-consistent computational method that accounts for essential factors such as electron screening, electron correlations, overlap, and exchange corrections, alongside shake-up and shake-off atomic effects.
To compute the electronic wave functions, we employ the Dirac-Hartree-Fock-Slater method, selected after a systematic comparison of binding energies, atomic relaxation energies, and Coulomb amplitudes against other established methods and experimental data.
A notable aspect of our calculations is the incorporation of an energy balance using atomic masses, enabling us to avoid approximations in determining the electron total binding energy and facilitating a more precise determination of the neutrino energy. This enhancement leads to significantly improved agreement between our predicted capture ratios and experimental observations, particularly for low-energy transitions.
Unlike previous studies that mainly focused on Q value and nuclear level energies, we extend our analysis by including uncertainties in atomic relaxation energies, broadening the assessment of electron capture observable uncertainties.
Detailed results are presented for nuclei of practical significance in both nuclear medicine and exotic physics searches, especially concerning liquid xenon detectors (67 Ga, 111 In, 123 I, 125 I, and 125 Xe).
