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Neutron single-particle strengths at N = 40, 42: Neutron knockout from 68,70Ni ground and isomeric states

Recchia, F, Weisshaar, D, Gade, A, Tostevin, JA, Janssens, RVF, Albers, M, Bader, VM, Baugher, T, Bazin, D, Berryman, JS , Brown, BA, Campbell, CM, Carpenter, MP, Chen, J, Chiara, CJ, Crawford, HL, Hoffman, CR, Kondev, FG, Korichi, A, Langer, C, Lauritsen, T, Liddick, SN, Lunderberg, E, Noji, S, Prokop, C, Stroberg, SR, Suchyta, S, Wimmer, K and Zhu, S (2016) Neutron single-particle strengths at N = 40, 42: Neutron knockout from 68,70Ni ground and isomeric states Physical Review C: Nuclear Physics, 94 (5), 054324.

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Abstract

The distribution of single-particle strength in 67,69Ni was characterized with one-neutron knockout reactions from intermediate-energy 68,70Ni secondary beams, selectively populating neutron-hole configurations at N = 39 and 41, respectively. The spectroscopic strengths deduced from the measured partial cross sections to the individual final states, as tagged by their γ-ray decays, are used to identify and quantify neutron configurations in the wave functions. While 69Ni compares well to shell-model predictions, the results for 67Ni challenge the validity of current effective shell-model Hamiltonians by revealing discrepancies that cannot be explained so far. These results suggest that our understanding of the low-lying states in the neutron-rich, semi-magic Ni isotopes may be incomplete and requires further investigation on both the experimental and theoretical sides.

Item Type: Article
Subjects : Physics
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Recchia, F
Weisshaar, D
Gade, A
Tostevin, JA
Janssens, RVF
Albers, M
Bader, VM
Baugher, T
Bazin, D
Berryman, JS
Brown, BA
Campbell, CM
Carpenter, MP
Chen, J
Chiara, CJ
Crawford, HL
Hoffman, CR
Kondev, FG
Korichi, A
Langer, C
Lauritsen, T
Liddick, SN
Lunderberg, E
Noji, S
Prokop, C
Stroberg, SR
Suchyta, S
Wimmer, K
Zhu, S
Date : 28 November 2016
Identification Number : 10.1103/PhysRevC.94.054324
Copyright Disclaimer : ©2016 American Physical Society. All rights reserved.
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 23 Nov 2016 16:55
Last Modified : 29 Nov 2016 09:28
URI: http://epubs.surrey.ac.uk/id/eprint/812950

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