Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States
Date
2016
Authors
Milne, S. A.
Bentley, M.A.
Simpson, Edward
Baugher, T.
Bazin, D.
Berryman, J.S.
Bruce, A M
Davies, P.J.
Diget, C. Aa
Gade, A
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American Physical Society
Abstract
One-neutron knockout reactions have been performed on a beam of radioactive Co53 in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cross section, and hence represents a technique that is applicable to the planned new generation of fragmentation-based radioactive beam facilities. Additionally, the relative cross sections among the excited states can be predicted to a high level of accuracy when reliable shell-model input is available. The work has resulted in a new level scheme, up to the 11+ band-termination state, of the proton-rich nucleus Co52 (Z=27, N=25). This has in turn enabled a study of mirror energy differences in the A=52 odd-odd mirror nuclei, interpreted in terms of isospin-nonconserving (INC) forces in nuclei. The analysis demonstrates the importance of using a full set of J-dependent INC terms to explain the experimental observations.
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Physical Review Letters
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Journal article
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Open Access
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