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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Spin ∼ 60 ℏ in
156
Dy: Competition between collective and terminating structures at very high-spin
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Volume 437, No. 1-2, Year 1998
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Description
The highest-spin discrete states (I ∼ 60 ℏ and Ex ∼ 30 MeV) in normal deformed nuclei have been observed in the rare-earth isotope 156Dy using the 124Sn(36S,4n) reaction in conjunction with the GAMMASPHERE spectrometer. The positive parity yrast sequence appears to evolve smoothly from a prolate (collective) towards an oblate (non-collective) shape, in contrast to the sudden shape change observed in the isotone 158Er. Terminating states are identified in the negative parity sequences at Iπ = 52- and 53- and specific multi-particle-hole configurations are assigned by comparison with cranked Nilsson-Strutinsky calculations. An order of magnitude increase in the interaction strength between close lying high-spin weakly collective structures is determined compared with that found in the lower-spin strongly collective domain. These results give valuable insight into the interplay between collective and terminating structures, and their competition for yrast status in the 40 - 60 ℏ spin range. © 1998 Elsevier Science B.V. All rights reserved.
Authors & Co-Authors
Kondev, Filip G.
United States, Tallahassee
Florida State University
Riley, Mark A.
United States, Tallahassee
Florida State University
Janssens, Robert V.F.
United States, Lemont
Argonne National Laboratory
Simpson, John J.
United Kingdom, Warrington
Daresbury Laboratory
Afanasjev, Anatoli V.
Sweden, Lund
Lunds Tekniska Högskola
Latvia, Salaspils
Nuclear Research Center Salaspils
Ragnarsson, Ingemar
Sweden, Lund
Lunds Tekniska Högskola
Ahmad, Irshad
United States, Lemont
Argonne National Laboratory
Blumenthal, D. J.
United States, Lemont
Argonne National Laboratory
Brown, T. B.
United States, Tallahassee
Florida State University
Carpenter, Michael P.
United States, Lemont
Argonne National Laboratory
Fallon, Paul J.
United States, Berkeley
Lawrence Berkeley National Laboratory
Fischer, Susan M.
United States, Lemont
Argonne National Laboratory
Hackman, Greg S.
United States, Lemont
Argonne National Laboratory
Hartley, D. J.
United States, Tallahassee
Florida State University
Kalfas, C. A.
Greece, Athens
Institute of Nuclear and Particle Physics
Khoo, Teng Lek
United States, Lemont
Argonne National Laboratory
Lauritsen, Torben
United States, Lemont
Argonne National Laboratory
Ma, Wenchao
United States, Mississippi State
Mississippi State University
Nisius, David T.
United States, Lemont
Argonne National Laboratory
Sharpey-Schafer, John F.
South Africa, Faure
National Accelerator Centre
Varmette, P. G.
United States, Mississippi State
Mississippi State University
Statistics
Citations: 21
Authors: 21
Affiliations: 9
Identifiers
Doi:
10.1016/S0370-2693(98)00938-1
ISSN:
03702693