Ordinary muon capture as a probe of virtual transitions of decay
Department of Physics, University of Jyväskylä
P.O. Box 35, FIN-40351, Jyväskylä, Finland
Accepted: 13 March 2002
A reliable theoretical description of double-beta-decay processes needs a possibility to test the involved virtual transitions against experimental data. Unfortunately, only the lowest virtual transition can be probed by the traditional electron capture or -decay experiments. In this article we propose that calculated amplitudes for many virtual transitions can be probed by experiments measuring rates of ordinary muon capture (OMC) to the relevant intermediate states. The first results from such experiments are expected to appear soon. As an example, we discuss the decays of and and the corresponding OMC for the and nuclei in the framework of the proton-neutron QRPA with realistic interactions. It is found that the OMC observables, just like the -decay amplitudes, strongly depend on the strength of the particle-particle part of the proton-neutron interaction.
PACS: 23.40.Bw – Weak-interaction and lepton (including neutrino) aspects / 23.40.Hc – Relation with nuclear matrix elements and nuclear structure / 21.60.Jz – Hartree-Fock and random-phase approximations
© EDP Sciences, 2002