Unexpected distribution of nu 1 f(7/2) strength in Ca-49

Publication Type
Journal Article
Year of Publication
2017
Editor
Crawford, H. L.
Macchiavelli, A. O.
Fallon, P.
Albers, M.
Bader, V. M.
Bazin, D.
Campbell, C. M.
Clark, R. M.
Cromaz, M.
Dilling, J.
Gade, A.
Gallant, A.
Holt, J. D.
Janssens, R. V. F.
Krucken, R.
Langer, C.
Lauritsen, T.
Lee, I. Y.
Menendez, J.
Noji, S.
Paschalis, S.
Recchia, F.
Rissanen, J.
Schwenk, A.
Scott, M.
Simonis, J.
Stroberg, S. R.
Tostevin, J. A.
Walz, C.
Weisshaar, D.
Wiens, A.
Wimmer, K.
Zhu, S.
Name of Publication
Physical Review C
Volume
95
Pagination
5
Issue
6
Date Published
Jun
Type of Article
Article
Short Title
Unexpected distribution of nu 1 f(7/2) strength in Ca-49
Accession Number
WOS:000404021500001
ISBN Number
2469-9985
Keywords
calcium isotopes, nuclear-forces, Physics
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 1 f(7/2) neutron hole states in Ca-47,Ca-49 following one-neutron knockout reactions from Ca-48,Ca-50. The observed reduction of strength populating the 7/2(1)(-) state in Ca-49, as compared to Ca-47, 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 l = 3 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.