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Experimental approach towards shell structure at Sn-100 and Ni-78

Grawe, H; Gorska, M; Fahlander, Claes LU ; Palacz, M; Nowacki, F; Caurier, E; Daugas, JM; Lewitowicz, M; Sawicka, M and Grzywacz, R, et al. (2002) In Nuclear Physics, Section A 704. p.211-222
Abstract
The status of experimental approach to Sn-100 and Ni-78 is reviewed. Revised single particle energies for neutrons are deduced for the N=Z=50 shell closure and evidence for low lying I-pi=2(+) and 3(-) states is presented. Moderate E2 polarization charges of 0.1 e and 0.6 e are found to reproduce the experimental data when core excitation of Sn-100 is properly accounted for in the shell model. For the neutron rich Ni region no conclusive evidence for an N=40 subshell is found, whereas firm evidence for the persistence of the N=50 shell at Ni-78 is inferred from the existence of seniority isomers. The disappearance of this isomerism in the mid nug(9/2) shell is discussed.
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publication status
published
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Nuclear Physics, Section A
volume
704
pages
211 - 222
publisher
Elsevier
external identifiers
  • wos:000177073200023
ISSN
0375-9474
DOI
10.1016/S0375-9474(02)00781-9
language
English
LU publication?
yes
id
ab67865f-8222-48f5-845f-d0522e97ee63 (old id 332614)
date added to LUP
2007-08-21 09:52:26
date last changed
2016-04-16 03:19:38
@article{ab67865f-8222-48f5-845f-d0522e97ee63,
  abstract     = {The status of experimental approach to Sn-100 and Ni-78 is reviewed. Revised single particle energies for neutrons are deduced for the N=Z=50 shell closure and evidence for low lying I-pi=2(+) and 3(-) states is presented. Moderate E2 polarization charges of 0.1 e and 0.6 e are found to reproduce the experimental data when core excitation of Sn-100 is properly accounted for in the shell model. For the neutron rich Ni region no conclusive evidence for an N=40 subshell is found, whereas firm evidence for the persistence of the N=50 shell at Ni-78 is inferred from the existence of seniority isomers. The disappearance of this isomerism in the mid nug(9/2) shell is discussed.},
  author       = {Grawe, H and Gorska, M and Fahlander, Claes and Palacz, M and Nowacki, F and Caurier, E and Daugas, JM and Lewitowicz, M and Sawicka, M and Grzywacz, R and Rykaczewski, K and Sorlin, O and Leenhardt, S and Azaiez, F},
  issn         = {0375-9474},
  language     = {eng},
  pages        = {211--222},
  publisher    = {Elsevier},
  series       = {Nuclear Physics, Section A},
  title        = {Experimental approach towards shell structure at Sn-100 and Ni-78},
  url          = {http://dx.doi.org/10.1016/S0375-9474(02)00781-9},
  volume       = {704},
  year         = {2002},
}