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Superdeformed triaxial bands in Lu-163,165

Schnack-Petersen, H; Bengtsson, Ragnar LU ; Bark, R. A.; Bosetti, P; Brockstedt, A.; Carlsson, H; Ekström, Peter LU ; Hagemann, G B; Herskind, B and Ingebretsen, F, et al. (1995) In Nuclear Physics A 594(2). p.175-202
Abstract
An experimental investigation of the nucleus 165Lu, using the reactions 138Ba(31P,4n) 165Lu and 150Sm(19F,4n) 165Lu at beam energies of E = 155 and 95 MeV, respectively, has been performed. Among other additions to the existing level scheme, a new band, with transition energies almost identical to a strongly deformed (β2 0.42) πi13/2[660 1/2+] band recently discovered in 163Lu has been established. A theoretical analysis of the structure of the two Lu isotopes, 165Lu and 163Lu is carried out by detailed calculations of total potential energy surfaces for specific configurations. By a diabatic treatment of crossings specific proton configurations as πi13/2[660 1/2+] are identified throughout the deformation space and as a function of spin.... (More)
An experimental investigation of the nucleus 165Lu, using the reactions 138Ba(31P,4n) 165Lu and 150Sm(19F,4n) 165Lu at beam energies of E = 155 and 95 MeV, respectively, has been performed. Among other additions to the existing level scheme, a new band, with transition energies almost identical to a strongly deformed (β2 0.42) πi13/2[660 1/2+] band recently discovered in 163Lu has been established. A theoretical analysis of the structure of the two Lu isotopes, 165Lu and 163Lu is carried out by detailed calculations of total potential energy surfaces for specific configurations. By a diabatic treatment of crossings specific proton configurations as πi13/2[660 1/2+] are identified throughout the deformation space and as a function of spin. It is found as a general feature that well deformed local minima of considerable nonaxial symmetry coexist with a normal deformed global minimum. The depth of these local minima depend on configuration. The structure of the different global and local minima found in these surfaces are analysed and discussed in terms of occupation of available basis configurations and their orientation relative to the rotation axis. The strongly deformed minima are found to belong to a group of superdeformed triaxial structures, expected to appear at low energies for certain favourable combinations of proton and neutron numbers. (Less)
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Nuclear Physics A
volume
594
issue
2
pages
175 - 202
publisher
Elsevier
external identifiers
  • Scopus:0001055881
DOI
10.1016/0375-9474(95)00363-6
language
English
LU publication?
yes
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2447f021-b31c-4c43-a694-663471d94352 (old id 772538)
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2007-12-18 20:06:55
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2016-12-04 04:48:25
@misc{2447f021-b31c-4c43-a694-663471d94352,
  abstract     = {An experimental investigation of the nucleus 165Lu, using the reactions 138Ba(31P,4n) 165Lu and 150Sm(19F,4n) 165Lu at beam energies of E = 155 and 95 MeV, respectively, has been performed. Among other additions to the existing level scheme, a new band, with transition energies almost identical to a strongly deformed (β2 0.42) πi13/2[660 1/2+] band recently discovered in 163Lu has been established. A theoretical analysis of the structure of the two Lu isotopes, 165Lu and 163Lu is carried out by detailed calculations of total potential energy surfaces for specific configurations. By a diabatic treatment of crossings specific proton configurations as πi13/2[660 1/2+] are identified throughout the deformation space and as a function of spin. It is found as a general feature that well deformed local minima of considerable nonaxial symmetry coexist with a normal deformed global minimum. The depth of these local minima depend on configuration. The structure of the different global and local minima found in these surfaces are analysed and discussed in terms of occupation of available basis configurations and their orientation relative to the rotation axis. The strongly deformed minima are found to belong to a group of superdeformed triaxial structures, expected to appear at low energies for certain favourable combinations of proton and neutron numbers.},
  author       = {Schnack-Petersen, H and Bengtsson, Ragnar and Bark, R. A. and Bosetti, P and Brockstedt, A. and Carlsson, H and Ekström, Peter and Hagemann, G B and Herskind, B and Ingebretsen, F and Jensen, H J and Leoni, S and Nordlund, A and Ryde, Hans and Tjom, P O and Yang, C X},
  language     = {eng},
  number       = {2},
  pages        = {175--202},
  publisher    = {ARRAY(0xa2dae68)},
  series       = {Nuclear Physics A},
  title        = {Superdeformed triaxial bands in Lu-163,165},
  url          = {http://dx.doi.org/10.1016/0375-9474(95)00363-6},
  volume       = {594},
  year         = {1995},
}