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Title: Superdeformation and band termination in A{approx}60 nuclei

Abstract

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 heaviermore » systems. (c) 1999 American Institute of Physics.« less

Authors:
 [1]
  1. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1 (Canada)
Publication Date:
OSTI Identifier:
20216643
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 481; Journal Issue: 1; Other Information: PBD: 2 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR DEFORMATION; ZINC 62; NEUTRONS; ENERGY LEVELS; ANGULAR MOMENTUM; NEUTRON-DEFICIENT ISOTOPES; SILICON 28 REACTIONS; ARGON 36 TARGET; HEAVY ION FUSION REACTIONS; CALCIUM 40 REACTIONS; SULFUR 32 TARGET; EXPERIMENTAL DATA; THEORETICAL DATA

Citation Formats

Svensson, C. E. Superdeformation and band termination in A{approx}60 nuclei. United States: N. p., 1999. Web. doi:10.1063/1.59519.
Svensson, C. E. Superdeformation and band termination in A{approx}60 nuclei. United States. doi:10.1063/1.59519.
Svensson, C. E. Thu . "Superdeformation and band termination in A{approx}60 nuclei". United States. doi:10.1063/1.59519.
@article{osti_20216643,
title = {Superdeformation and band termination in A{approx}60 nuclei},
author = {Svensson, C. E.},
abstractNote = {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.},
doi = {10.1063/1.59519},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 481,
place = {United States},
year = {1999},
month = {9}
}