Reduced occupancy of the deeply bound 0d(5/2) neutron state in 32Ar.

Authors :: Gade A
Bazin D
Brown BA
Campbell CM
Church JA
Dinca DC
Enders J
Glasmacher T
Hansen PG
Hu Z
Kemper KW
Mueller WF
Olliver H
Perry BC
Riley LA
Roeder BT
Sherrill BM
Terry JR
Tostevin JA
Yurkewicz KL
Source :: Physical review letters [Phys Rev Lett] 2004 Jul 23; Vol. 93 (4), pp. 042501. Date of Electronic Publication: 2004 Jul 19.
Publication Year :: 2004
Abstract: 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.<br /> (Copyright 2004 The American Physical Society)