Advanced

Single-particle and collective excitations in Ni 62

Albers, M.; Zhu, S.; Ayangeakaa, A. D.; Janssens, R. V F; Gellanki, J. LU ; Ragnarsson, I. LU ; Alcorta, M.; Baugher, T.; Bertone, P. F. and Carpenter, M. P., et al. (2016) In Physical Review C - Nuclear Physics 94(3).
Abstract

Background: Level sequences of rotational character have been observed in several nuclei in the A=60 mass region. The importance of the deformation-driving πf7/2 and νg9/2 orbitals on the onset of nuclear deformation is stressed. Purpose: A measurement was performed in order to identify collective rotational structures in the relatively neutron-rich Ni62 isotope. Method: The Mg26(Ca48,2α4nγ)Ni62 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. Results: Two collective bands, built upon states of single-particle character, were identified and sizable deformation was... (More)

Background: Level sequences of rotational character have been observed in several nuclei in the A=60 mass region. The importance of the deformation-driving πf7/2 and νg9/2 orbitals on the onset of nuclear deformation is stressed. Purpose: A measurement was performed in order to identify collective rotational structures in the relatively neutron-rich Ni62 isotope. Method: The Mg26(Ca48,2α4nγ)Ni62 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. Results: 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. Conclusions: 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 f7/2 protons and g9/2 neutrons, driving the nucleus to sizable prolate deformation.

(Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C - Nuclear Physics
volume
94
issue
3
publisher
American Physical Society
external identifiers
  • scopus:84990214589
  • wos:000383045700001
ISSN
0556-2813
DOI
10.1103/PhysRevC.94.034301
language
English
LU publication?
yes
id
56d39d65-2596-4ee0-bbad-6b992e191ab7
date added to LUP
2016-11-29 13:50:33
date last changed
2017-08-06 05:14:14
@article{56d39d65-2596-4ee0-bbad-6b992e191ab7,
  abstract     = {<p>Background: Level sequences of rotational character have been observed in several nuclei in the A=60 mass region. The importance of the deformation-driving πf7/2 and νg9/2 orbitals on the onset of nuclear deformation is stressed. Purpose: A measurement was performed in order to identify collective rotational structures in the relatively neutron-rich Ni62 isotope. Method: The Mg26(Ca48,2α4nγ)Ni62 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. Results: 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. Conclusions: 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 f7/2 protons and g9/2 neutrons, driving the nucleus to sizable prolate deformation.</p>},
  articleno    = {034301},
  author       = {Albers, M. and Zhu, S. and Ayangeakaa, A. D. and Janssens, R. V F and Gellanki, J. and Ragnarsson, I. and Alcorta, M. and Baugher, T. and Bertone, P. F. and Carpenter, M. P. and Chiara, C. J. and Chowdhury, P. and David, H. M. and Deacon, A. N. and Digiovine, B. and Gade, A. and Hoffman, C. R. and Kondev, F. G. and Lauritsen, T. and Lister, C. J. and McCutchan, E. A. and Nair, C. and Rogers, A. M. and Seweryniak, D.},
  issn         = {0556-2813},
  language     = {eng},
  month        = {09},
  number       = {3},
  publisher    = {American Physical Society},
  series       = {Physical Review C - Nuclear Physics},
  title        = {Single-particle and collective excitations in Ni 62},
  url          = {http://dx.doi.org/10.1103/PhysRevC.94.034301},
  volume       = {94},
  year         = {2016},
}