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Wobbling phonon excitations, coexisting with normal deformed structures in Lu-163

Jensen, DR; Hagemann, GB; Hamamoto-Kuroda, Ikuko LU ; Odegard, SW; Bergstrom, M; Herskind, B; Sletten, G; Tormanen, S; Wilson, JN and Tjom, PO, et al. (2002) In Nuclear Physics, Section A 703(1-2). p.3-44
Abstract
Wobbling is a rotational mode unique to a triaxial body. The Lu-Hf isotopes with N similar to 94 at high spin provide a possible region of nuclei with pronounced triaxiality. We have investigated Lu-163 through the fusion-evaporation reaction La-139(Si-29,5n)Lu-163 with a beam energy of 152 MeV. Three excited bands decaying into the known, presumably triaxial, superdeformed (TSD) band built on the i(13/2) proton orbital are observed. The electromagnetic properties of the connecting transitions from the two strongest populated excited TSD bands have been investigated. New particle-rotor calculations in which one i(13/2) quasiproton is coupled to the core of triaxial shape produce a variety of bands, whose properties can clearly be... (More)
Wobbling is a rotational mode unique to a triaxial body. The Lu-Hf isotopes with N similar to 94 at high spin provide a possible region of nuclei with pronounced triaxiality. We have investigated Lu-163 through the fusion-evaporation reaction La-139(Si-29,5n)Lu-163 with a beam energy of 152 MeV. Three excited bands decaying into the known, presumably triaxial, superdeformed (TSD) band built on the i(13/2) proton orbital are observed. The electromagnetic properties of the connecting transitions from the two strongest populated excited TSD bands have been investigated. New particle-rotor calculations in which one i(13/2) quasiproton is coupled to the core of triaxial shape produce a variety of bands, whose properties can clearly be interpreted either as "wobbling" or "cranking" motion of the core. Evidence for the assignment of the excited TSD bands as one, and possibly even two wobbling phonon modes built on the yrast TSD band in Lu-163 is given. These triaxial bands coexist with bands built on quasiparticle excitations in the normal deformed (ND) minimum for which new data are also presented. (Less)
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type
Contribution to journal
publication status
published
subject
in
Nuclear Physics, Section A
volume
703
issue
1-2
pages
3 - 44
publisher
Elsevier
external identifiers
  • wos:000175730000001
  • scopus:0037140809
ISSN
0375-9474
DOI
10.1016/S0375-9474(01)01459-2
language
English
LU publication?
yes
id
b6530f8f-9ab5-461f-9f72-4ae1c81d0a9f (old id 337427)
date added to LUP
2007-10-24 15:39:47
date last changed
2017-12-10 04:40:25
@article{b6530f8f-9ab5-461f-9f72-4ae1c81d0a9f,
  abstract     = {Wobbling is a rotational mode unique to a triaxial body. The Lu-Hf isotopes with N similar to 94 at high spin provide a possible region of nuclei with pronounced triaxiality. We have investigated Lu-163 through the fusion-evaporation reaction La-139(Si-29,5n)Lu-163 with a beam energy of 152 MeV. Three excited bands decaying into the known, presumably triaxial, superdeformed (TSD) band built on the i(13/2) proton orbital are observed. The electromagnetic properties of the connecting transitions from the two strongest populated excited TSD bands have been investigated. New particle-rotor calculations in which one i(13/2) quasiproton is coupled to the core of triaxial shape produce a variety of bands, whose properties can clearly be interpreted either as "wobbling" or "cranking" motion of the core. Evidence for the assignment of the excited TSD bands as one, and possibly even two wobbling phonon modes built on the yrast TSD band in Lu-163 is given. These triaxial bands coexist with bands built on quasiparticle excitations in the normal deformed (ND) minimum for which new data are also presented.},
  author       = {Jensen, DR and Hagemann, GB and Hamamoto-Kuroda, Ikuko and Odegard, SW and Bergstrom, M and Herskind, B and Sletten, G and Tormanen, S and Wilson, JN and Tjom, PO and Spohr, K and Huble, H and Gorgen, A and Schonwasser, G and Bracco, A and Leoni, S and Maj, A and Petrache, CM and Bednarczyk, P and Curien, D},
  issn         = {0375-9474},
  language     = {eng},
  number       = {1-2},
  pages        = {3--44},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section A},
  title        = {Wobbling phonon excitations, coexisting with normal deformed structures in Lu-163},
  url          = {http://dx.doi.org/10.1016/S0375-9474(01)01459-2},
  volume       = {703},
  year         = {2002},
}