Abstract
The calcium isotopes have emerged as a critical testing ground for new microscopically derived shell-model interactions, and a great deal of experimental and theoretical focus has been directed toward this region. We investigate the relative spectroscopic strengths associated with neutron hole states in following one-neutron knockout reactions from . The observed reduction of strength populating the state in , as compared to , is inconsistent with shell-model calculations using both phenomenological interactions such as GXPF1, and interactions derived from microscopically based two- and three-nucleon forces. The result suggests a fragmentation of the strength to higher-lying states as suggested by the microscopic calculations, but the observed magnitude of the reduction is not reproduced in any shell-model description.
- Received 17 August 2016
- Revised 18 November 2016
DOI:https://doi.org/10.1103/PhysRevC.95.064317
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