Reduced Occupancy of the Deeply Bound0 d 5 / 2 Neutron State inA r
Author(s) -
A. Gade,
D. Bazin,
B. A. Brown,
C. M. Campbell,
J. A. Church,
D.C. Dinca,
J. Enders,
T. Glasmacher,
P.G. Hansen,
Z. Hu,
K. W. Kemper,
W. F. Mueller,
H. Olliver,
B. C. Perry,
L. A. Riley,
B. T. Roeder,
B. M. Sherrill,
J. R. Terry,
J. A. Tostevin,
K. L. Yurkewicz
Publication year - 2004
Publication title -
physical review letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.688
H-Index - 673
eISSN - 1079-7114
pISSN - 0031-9007
DOI - 10.1103/physrevlett.93.042501
Subject(s) - physics , energy (signal processing) , ground state , eikonal equation , crystallography , proton , eikonal approximation , atomic physics , nuclear physics , quantum mechanics , chemistry
The 9Be(32Ar, 31Ar)X reaction, leading to the 5/2+ ground state of a nucleus at the proton drip line, has a cross section of 10.4(13) mb at a beam energy of 65.1 MeV/nucleon. This translates into a spectroscopic factor that is only 24(3)% of that predicted by the many-body shell-model theory. We introduce refinements to the eikonal reaction theory used to extract the spectroscopic factor to clarify that this very strong reduction represents an effect of nuclear structure. We suggest that it reflects correlation effects linked to the high neutron separation energy (22.0 MeV) for this state.
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