Journal
PHYSICAL REVIEW C
Volume 88, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.88.054314
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Funding
- U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357, DE-FG02-94ER40834, DE-FG02-08ER41556]
- National Science Foundation [PHY-0606007]
- Swedish Research Council
- United Kingdom Science and Technology Facilities Council (STFC)
- Science and Technology Facilities Council [ST/F008805/1] Funding Source: researchfish
- STFC [ST/F008805/1] Funding Source: UKRI
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A study of excited states in Ni-63 up to an excitation energy of 28 MeV and a probable spin of 57/2 was carried out with the Mg-26(Ca-48,2 alpha 3n gamma)Ni-63 reaction at beam energies between 275 and 320 MeV. Three collective bands, built upon states of single-particle character, were identified. For two of the three bands, the transition quadrupole moments were extracted, herewith quantifying the deformation at high spin. The results have been compared with shell-model and cranked Nilsson-Strutinsky calculations. Despite the Z = 28 shell closure and the approach to the purported N = 40 subshell, the Ni-63 isotope is able to sustain collective excitations at moderate and high spin.
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