Single-particle and collective excitations in Ni62

Albers, M.; Zhu, S.; Ayangeakaa, A. D.; Janssens, R. V. F.; Gellanki, J.; Ragnarsson, I.; Alcorta, M.; Baugher, T.; Bertone, P. F.; Carpenter, M. P.; Chiara, C. J.; Chowdhury, P.; David, H. M.; Deacon, A. N.; DiGiovine, B.; Gade, A.; Hoffman, C. R.; Kondev, F. G.; Lauritsen, T.; Lister, C. J.; McCutchan, E. A.; Nair, C.; Rogers, A. M.; Seweryniak, D.

doi:10.1103/PhysRevC.94.034301

Title: Single-particle and collective excitations in ${}^{62}{Ni}$

Journal Article · Thu Sep 01 00:00:00 EDT 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.034301· OSTI ID:1332330

Albers, M. ^[1]; Zhu, S. ^[1]; Ayangeakaa, A. D. ^[1]; Janssens, R. V. F. ^[1]; Gellanki, J. ^[2]; Ragnarsson, I. ^[3]; Alcorta, M. ^[4]; Baugher, T. ^[5]; Bertone, P. F. ^[6]; Carpenter, M. P. ^[1]; Chiara, C. J. ^[7]; Chowdhury, P. ^[8]; David, H. M. ^[9]; Deacon, A. N. ^[10]; DiGiovine, B. ^[1]; Gade, A. ^[5]; Hoffman, C. R. ^[1]; Kondev, F. G. ^[1]; Lauritsen, T. ^[1]; Lister, C. J. ^[11] more »

Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. of Groningen, Groningen (The Netherlands)
Lund Univ., Lund (Sweden)
Argonne National Lab. (ANL), Argonne, IL (United States); TRIUMF, Vancouver, BC (Canada)
Michigan State Univ., East Lansing, MI (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Marshall Space Flight Center, Huntsville, AL (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Maryland, College Park, MD (United States); U.S. Army Research Lab., Adelphi, MD (United States)
Univ. of Massachusetts, Lowell, MA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt (Germany)
Univ. of Manchester, Manchester (United Kingdom)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Massachusetts, Lowell, MA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)

In this study, level sequences of rotational character have been observed in several nuclei in the A = 60 mass region. The importance of the deformation-driving πf_7/2 and νg_9/2 orbitals on the onset of nuclear deformation is stressed. A measurement was performed in order to identify collective rotational structures in the relatively neutron-rich ⁶²Ni isotope. Here, the ²⁶Mg(⁴⁸Ca,2α4nγ)⁶²Ni complex reaction at beam energies between 275 and 320 MeV was utilized. Reaction products were identified in mass (A) and charge (Z) with the fragment mass analyzer (FMA) and γ rays were detected with the Gammasphere array. As a result, two collective bands, built upon states of single-particle character, were identified and sizable deformation was assigned to both sequences based on the measured transitional quadrupole moments, herewith quantifying the deformation at high spin. In conclusion, based on cranked Nilsson-Strutinsky calculations and comparisons with deformed bands in the A = 60 mass region, the two rotational bands are understood as being associated with configurations involving multiple f_7/2 protons and g_9/2 neutrons, driving the nucleus to sizable prolate deformation.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Science Foundation (NSF); Swedish Research Council (SRC); United Kingdom Science and Technology Facilities Council; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-06CH11357; FG02-94ER40834; FG02-94ER40848; FG02-08ER41556

OSTI ID:: 1332330

Alternate ID(s):: OSTI ID: 1314347

Journal Information:: Physical Review C, Vol. 94, Issue 3; ISSN 2469-9985

Publisher:: APSCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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References (52)

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