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4 results on '"Yurkewicz KL"'

3. E2 excitation strength in Ni-55: Coupling of the Ni-56 2(1)(+) collective core vibration to the f(7/2) odd neutron hole

Author

Yurkewicz, KL, Bazin, D, Brown, BA, Campbell, CM, Church, JA, Dinca, DC, Gade, A, Glasmacher, T, Honma, M, Mizusaki, T, Mueller, WF, Olliver, H, Otsuka, Taka, Riley, LA, and Terry, JR

Abstract

The collectivity of the odd-mass nucleus 55 Ni was explored via intermediate-energy Coulomb excitation using a powerful combination of particle and g -ray spectroscopy. A g -ray at 2879 ( 18 ) keV was observed and is interpreted to deexcite a member of the core-coupled quintuplet 2 1 + s 56 Ni d ^ n f 7/2 −1 at the same energy. By similarity with the mirror nucleus 55 Co, transition probabilities were calculated assuming J p =9/2 − and J p =11/2 − for this state. Both assumptions lead to a transition strength higher than predicted by a large-scale shell-model calculation using the GXPF1 effective interaction and exceed the value predicted within a simple weak-coupling approach ispartof: Physical Review C, Nuclear Physics vol:70 issue:6 status: published

Published
2004

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

Author

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, and Yurkewicz KL

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., (Copyright 2004 The American Physical Society)

Published
2004
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