Superdeformation and band termination in A{approx}60 nuclei

Journal Article · Thu Sep 02 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59519· OSTI ID:20216643

Svensson, C E ^[1]

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1. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1 (Canada)

High-spin states in proton-rich A{approx}60 nuclei on and near the N=Z line have been studied in a series of experiments performed with Gammasphere and the Microball charged-particle detector array. These experiments have led to the identification of more than 40 deformed and superdeformed rotational bands in more than a dozen different Ni, Cu, and Zn isotopes. Because of the limited spin content of the single-particle configurations in these relatively light nuclei, many of these bands are observed to, or close to, their terminating states. Lifetime measurements for two sets of strongly coupled rotational bands in {sup 62}Zn have confirmed the predicted loss of collectivity associated with the phenomenon of smooth band termination. Superdeformed bands have been observed in {sup 60,61,62,65}Zn, firmly establishing an island of superdeformation for nuclei with particle numbers N,Z{approx_equal}30. Linking transitions connecting the doubly-magic SD band in the N=Z nucleus {sup 60}Zn to the yrast line have been identified. These linking transitions not only provide the first definite spin, parity, and excitation energy measurements for SD states in the A{approx}60 mass region, but their stretched E2 character and relatively large B(E2) values suggest that the decay-out process in this region differs substantially from that observed in heavier systems. (c) 1999 American Institute of Physics.

• OSTI ID: 20216643
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 481; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
ARGON 36 TARGET
CALCIUM 40 REACTIONS
ENERGY LEVELS
EXPERIMENTAL DATA
HEAVY ION FUSION REACTIONS
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NUCLEAR DEFORMATION
SILICON 28 REACTIONS
SULFUR 32 TARGET
THEORETICAL DATA
ZINC 62