The current experimental effort to detect neutrinoless double beta decay (0νββ) has encouraged significant interest in understanding the nuclei that are candidates for the observation of this process. The goal of this thesis is to contribute to the current body of work on the germanium isotopes near 76Ge, a candidate nucleus currently being used by several large-scale searches for 0νββ. Single-nucleon transfer experiments have been very successful in determining the occupancies of the valence shells in the parent and daughter nuclei 76Ge and 76Se. However, understanding the ground-state pairing of neutrons in 76Ge and protons in 76Se is also crucial because 0νββ converts correlated neutron pairs to correlated proton pairs. Neutron pairing in 76Ge has been found to be concentrated almost exclusively in the ground state, but studies on the tellurium isotopes have indicated that a fully neutron-paired ground state does not constrain the distribution of proton-pairing strength. This work uses the (3He,n) transfer reaction with a 74Ge target to investigate the proton-pairing strength distribution in 76Se. It is found that proton pairs transfer predominantly to the ground state of 76Se. Proton-pair transfer to excited 0+ states in 76Se is determined to be less than 4–8% of the ground-state pair-transfer strength.
|Advisor:||Kolata, James J.|
|School:||University of Notre Dame|
|School Location:||United States -- Indiana|
|Source:||DAI-B 75/06(E), Dissertation Abstracts International|
|Keywords:||Neutrinoless double beta decay, Nuclear matrix element, Pairing strength distribution, Proton pairing|
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