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Magic gaps and intruder levels in triaxially superdeformed nuclei

Bengtsson, Ragnar LU and Ryde, Hans LU (2004) In European Physical Journal A. Hadrons and Nuclei1998-01-01+01:00 22(3). p.355-362
Abstract
Nuclear shell model calculations based on a modified harmonic-oscillator potential result in amazingly stable triaxial nuclear shapes. Major gaps in the single-particle energy spectra at proton number 71 and neutron number 94 combine constructively at low and intermediate rotational frequencies. At high frequencies, gaps at proton number 72 and neutron number 97 combine in an equally favourable way. The sizes of the gaps may be as large as 35% of the values for the gaps at the classical magic numbers 50 and 82 at spherical shape. The dependence on the positions of the intruder levels in forming the gaps is discussed. Experimentally observed rotational bands in lutetium (Z = 71) and hafnium (Z = 72) appear in isotopes and frequency ranges,... (More)
Nuclear shell model calculations based on a modified harmonic-oscillator potential result in amazingly stable triaxial nuclear shapes. Major gaps in the single-particle energy spectra at proton number 71 and neutron number 94 combine constructively at low and intermediate rotational frequencies. At high frequencies, gaps at proton number 72 and neutron number 97 combine in an equally favourable way. The sizes of the gaps may be as large as 35% of the values for the gaps at the classical magic numbers 50 and 82 at spherical shape. The dependence on the positions of the intruder levels in forming the gaps is discussed. Experimentally observed rotational bands in lutetium (Z = 71) and hafnium (Z = 72) appear in isotopes and frequency ranges, which are consistent with the gaps in the theoretical single-particle energy spectra. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal A. Hadrons and Nuclei1998-01-01+01:00
volume
22
issue
3
pages
355 - 362
publisher
Springer
external identifiers
  • wos:000226095800003
  • scopus:11944272822
ISSN
1434-6001
DOI
10.1140/epja/i2004-10046-4
language
English
LU publication?
yes
id
831ab6f9-d927-44dc-8e76-dd0fa7d60d2d (old id 258007)
date added to LUP
2007-10-17 08:19:57
date last changed
2017-08-27 05:17:27
@article{831ab6f9-d927-44dc-8e76-dd0fa7d60d2d,
  abstract     = {Nuclear shell model calculations based on a modified harmonic-oscillator potential result in amazingly stable triaxial nuclear shapes. Major gaps in the single-particle energy spectra at proton number 71 and neutron number 94 combine constructively at low and intermediate rotational frequencies. At high frequencies, gaps at proton number 72 and neutron number 97 combine in an equally favourable way. The sizes of the gaps may be as large as 35% of the values for the gaps at the classical magic numbers 50 and 82 at spherical shape. The dependence on the positions of the intruder levels in forming the gaps is discussed. Experimentally observed rotational bands in lutetium (Z = 71) and hafnium (Z = 72) appear in isotopes and frequency ranges, which are consistent with the gaps in the theoretical single-particle energy spectra.},
  author       = {Bengtsson, Ragnar and Ryde, Hans},
  issn         = {1434-6001},
  language     = {eng},
  number       = {3},
  pages        = {355--362},
  publisher    = {Springer},
  series       = {European Physical Journal A. Hadrons and Nuclei1998-01-01+01:00},
  title        = {Magic gaps and intruder levels in triaxially superdeformed nuclei},
  url          = {http://dx.doi.org/10.1140/epja/i2004-10046-4},
  volume       = {22},
  year         = {2004},
}