Abstract
The Gamow-Teller (GT) strength distribution has been investigated in a high-resolution (He,) charge-exchange experiment on the double-beta () decaying nucleus Mo. The experiment was carried out at the Osaka University Research Center for Nuclear Physics (RCNP) with a 420 MeV incident He beam and the Grand Raiden magnetic spectrometer. A final-state energy resolution of 33 keV was achieved. It was found that nearly the entire low-energy (up to MeV) strength is concentrated in the ground-state transition to Tc, which is interpreted as a result of the particular neutron and proton sub-shell occupancies. The impact on the matrix elements for the two-neutrino double-beta () decay and the use of Mo as a neutrino detection material is discussed.
- Received 18 August 2012
DOI:https://doi.org/10.1103/PhysRevC.86.044309
©2012 American Physical Society