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Title: Excited states in ¹⁶¹W and ¹⁶²W and the onset of collectivity in the neutron-deficient tungsten isotopes
Author: Higgins, Emily
ISNI:       0000 0004 7656 9017
Awarding Body: University of Liverpool
Current Institution: University of Liverpool
Date of Award: 2019
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Excited states have been established in the neutron-deficient odd-N nucleus 161W for the first time. The level scheme has been interpreted in terms of multi-particle excitations of independent nucleons outside of a closed shell. The excitation level scheme for the neutron-deficient nuclide 162W has been extended using recoil-decay correlations to a tentative spin of 17⁻. The collective nucleus has been interpreted in terms of rotationally aligned bands. Configuration assignments have been made on the basis of comparisons of the angular momentum of initial emitting states, as a function of transition energy, with the predictions of the cranked shell model. Comparisons made between these two nuclei and their neighbouring isotopes and isotones indicate rapid changes in nuclear structure dependent on the available valence space beyond the N = 82 shell closure.
Supervisor: Joss, David T. ; Paul, Edward Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral