Search For Hyperdeformation In Xe Nuclei

Journal Article · Tue Apr 05 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1905290· OSTI ID:20630875

Hansen, C Roenn; Hagemann, G B; Herskind, B; Jensen, D R; Sletten, G; Odegaard, S ^[1]; Wilson, J N; Korichi, A; Roccaz, J ^[2]; Bringel, P; Engelhardt, C; Huebel, H; Neusser, A; Singh, A K ^[3]; Benzoni, G; Bracco, A; Camera, F; Leoni, S ^[4]; Maj, A ^[5]; Byrski, Th ^[6]

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1. Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen O (Denmark)
2. CSNSM, F-91406 Orsay (France)
3. ISKP, University of Bonn, Nussallee 14-16, D53115 Bonn (Germany)
4. Dipartemento di Fisica, Universita di Milan (Italy) and INFN (Italy)
5. IFJ, PAN, Cracow (Poland)
6. IReS, IN2P3/CNRS, F-67037 Strasbourg (France); and others

Two experiments to identify hyperdeformation in Xe-nuclei have been made using the reaction 82Se(48Ca,xn)130-xXe, the first one with the EUROBALL-IV array equipped with a BGO calorimeter and the second one with the Gammasphere array. A bombarding energy of 195 MeV was used with the VIVITRON and 206 MeV with the ATLAS accelerator. No discrete hyperdeformed bands have been identified, but a ridge structure with 4 ({Dirac_h}/2{pi}){sup 2}/J {approx} 0.048 MeV corresponding to a very large deformation was observed. A fluctuation analysis revealed that these ridges are composed of more than 10 rotational bands with {>=} 5 transitions each. Seven and four discrete bands extending from I {approx} 20 to I {approx} 60 have been identified in 125Xe and in 126Xe respectively, with a {delta}E{gamma} of 100 - 120 keV. These bands are most probably related to a potential energy minimum at {epsilon} {approx} 0.35 and a small {gamma}-deformation predicted by Ultimate Crancker calculations. The transition quadrupole moments, crossing frequencies and alignments observed in the bands compare very well with those expected for this minimum.

• OSTI ID: 20630875
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 764; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 48 REACTIONS
COMPARATIVE EVALUATIONS
DEFORMED NUCLEI
ENERGY-LEVEL TRANSITIONS
FLUCTUATIONS
KEV RANGE
MEV RANGE
NUCLEAR DEFORMATION
POTENTIAL ENERGY
QUADRUPOLE MOMENTS
ROTATIONAL STATES
SELENIUM 82 TARGET
XENON 125
XENON 126
XENON 130