Neutrinoless double-electron capture
Kotila, J.-M., Barea, J. L., & Iachello, F. (2014). Neutrinoless double-electron capture. Physical Review C - Nuclear Physics, 89 (6), 064319. doi:10.1103/PhysRevC.89.064319
Julkaistu sarjassaPhysical Review C - Nuclear Physics
© 2014 American Physical Society. Published in this repository with the kind permission of the publisher.
Direct determination of the neutrino mass is at the present time one of the most important aims of experimental and theoretical research in nuclear and particle physics. A possible way of detection is through neutrinoless double-electron capture, 0νECEC. This process can only occur when the energy of the initial state matches precisely that of the final state. We present here a calculation of prefactors (PFs) and nuclear matrix elements (NMEs) within the framework of the microscopic interacting boson model (IBM-2) for 124Xe, 152Gd, 156Dy, 164Er, and 180W. From the PF and NME we calculate the expected half-lives and obtain results that are of the same order as those of 0νβ+β+ decay, but considerably longer than those of 0νβ−β− decay.