Neutron single-particle strengths at N=40, 42: Neutron knockout from Ni68,70 ground and isomeric states

Recchia, F.; Weisshaar, D.; Gade, A.; Tostevin, J. A.; Janssens, R. V. F.; Albers, M.; Bader, V. M.; Baugher, T.; Bazin, D.; Berryman, J. S.; Brown, B. A.; Campbell, C. M.; Carpenter, M. P.; Chen, J.; Chiara, C. J.; Crawford, H. L.; Hoffman, C. R.; Kondev, F. G.; Korichi, A.; Langer, C.; Lauritsen, T.; Liddick, S. N.; Lunderberg, E.; Noji, S.; Prokop, C.; Stroberg, S. R.; Suchyta, S.; Wimmer, K.; Zhu, S.

doi:10.1103/PhysRevC.94.054324

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

Journal Article · Mon Nov 28 00:00:00 EST 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.054324· OSTI ID:1334537

Recchia, F. ^[1]; Weisshaar, D. ^[2]; Gade, A. ^[2]; Tostevin, J. A. ^[3]; Janssens, R. V. F. ^[4]; Albers, M. ^[4]; Bader, V. M. ^[2]; Baugher, T. ^[5]; Bazin, D. ^[2]; Berryman, J. S. ^[2]; Brown, B. A. ^[2]; Campbell, C. M. ^[6]; Carpenter, M. P. ^[4]; Chen, J. ^[7]; Chiara, C. J. ^[8]; Crawford, H. L. ^[6]; Hoffman, C. R. ^[4]; Kondev, F. G. ^[4]; Korichi, A. ^[9]; Langer, C. ^[2] more »

Michigan State Univ., East Lansing, MI (United States); Univ. degli Studi di Padova and INFN Padova, Padova (Italy)
Michigan State Univ., East Lansing, MI (United States)
Univ. of Surrey, Surrey (United Kingdom)
Argonne National Lab. (ANL), Argonne, IL (United States)
Michigan State Univ., East Lansing, MI (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Michigan State Univ., East Lansing, MI (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); U.S. Army Research Lab., Adelphi, MD (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); CSNSM-IN2P3/CNRS, Orsay Campus (France)
Michigan State Univ., East Lansing, MI (United States); TRIUMF, Vancouver, BC (Canada)
Michigan State Univ., East Lansing, MI (United States); Univ. of California, Berkeley, CA (United States)
Michigan State Univ., East Lansing, MI (United States); Central Michigan Univ., Mount Pleasant, MI (United States); The Univ. of Tokyo, Tokyo (Japan)

© 2016 American Physical Society.The distribution of single-particle strength in Ni67,69 was characterized with one-neutron knockout reactions from intermediate-energy Ni68,70 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 Ni69 compares well with shell-model predictions, the results for Ni67 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, semimagic Ni isotopes may be incomplete and requires further investigation on both the experimental and theoretical sides.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; AC02-05CH11231; FG02-08ER41556; FG02-94-ER40834; NA0000979

OSTI ID:: 1334537

Alternate ID(s):: OSTI ID: 1333588; OSTI ID: 1379593

Journal Information:: Physical Review C, Vol. 94, Issue 5; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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