Testing mean-field models near the N=Z line: gamma-ray spectroscopy of the T-z=1/2 nucleus Kr-73
(2002) In Physical Review C (Nuclear Physics) 65(4).- Abstract
- Excited states in the N=Z+1 nucleus Kr-73 have been investigated using the Ca-40(Ar-36,2pn) and Ca-40(Ca-40,alpha2pn) reactions at 145 and 160 MeV, respectively. gamma rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring Kr-72,Kr-74, indicating a strong shape-stabilizing role for the valence neutron. The experimental... (More)
- Excited states in the N=Z+1 nucleus Kr-73 have been investigated using the Ca-40(Ar-36,2pn) and Ca-40(Ca-40,alpha2pn) reactions at 145 and 160 MeV, respectively. gamma rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring Kr-72,Kr-74, indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of T=0 pairing correlations. At high spin all the models can reproduce the experimental data. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/910044
- author
- organization
- publishing date
- 2002
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review C (Nuclear Physics)
- volume
- 65
- issue
- 4
- article number
- 044331
- publisher
- American Physical Society
- external identifiers
-
- wos:000175186200052
- scopus:85035287045
- ISSN
- 0556-2813
- DOI
- 10.1103/PhysRevC.65.044331
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
- id
- 5656f112-45ed-472c-9b4a-ededac4c0797 (old id 910044)
- date added to LUP
- 2016-04-01 16:15:57
- date last changed
- 2022-02-12 20:58:08
@article{5656f112-45ed-472c-9b4a-ededac4c0797, abstract = {{Excited states in the N=Z+1 nucleus Kr-73 have been investigated using the Ca-40(Ar-36,2pn) and Ca-40(Ca-40,alpha2pn) reactions at 145 and 160 MeV, respectively. gamma rays were detected using the Gammasphere array and events were recorded in coincidence with charged-particle and neutron detectors. The three previously observed bands were extended to high spin, and a new unfavored positive-parity band has been observed. The alignment characteristics and decay properties of the bands are all consistent with large-deformation prolate rotation, with no clear evidence for oblate bands or shape coexistence. This is quite different from neighboring Kr-72,Kr-74, indicating a strong shape-stabilizing role for the valence neutron. The experimental results are compared to extended total Routhian surface, cranked Nilsson Strutinsky, and cranked relativistic mean-field calculations. The results suggest that the paired calculations lack some important physics. Neutron-proton correlations may be the missing ingredient. There is also evidence for an unusual band crossing in the negative-parity bands, which may indicate the presence of T=0 pairing correlations. At high spin all the models can reproduce the experimental data.}}, author = {{Kelsall, NS and Fischer, SM and Balamuth, DP and Ball, GC and Carpenter, MP and Clark, RM and Durell, J and Fallon, P and Freeman, SJ and Hausladen, PA and Janssens, RVF and Jenkins, DG and Leddy, MJ and Lister, CJ and Macchiavelli, AO and Sarantites, DG and Schmidt, DC and Seweryniak, D and Svensson, CE and Varley, BJ and Vincent, S and Wadsworth, R and Wilson, AN and Afanasjev, AV and Frauendorf, S and Ragnarsson, Ingemar and Wyss, R}}, issn = {{0556-2813}}, language = {{eng}}, number = {{4}}, publisher = {{American Physical Society}}, series = {{Physical Review C (Nuclear Physics)}}, title = {{Testing mean-field models near the N=Z line: gamma-ray spectroscopy of the T-z=1/2 nucleus Kr-73}}, url = {{http://dx.doi.org/10.1103/PhysRevC.65.044331}}, doi = {{10.1103/PhysRevC.65.044331}}, volume = {{65}}, year = {{2002}}, }