Structure of Neutron-rich N = 126 Closed Shell Nuclei
- Department of Physics, University of Surrey, Guildford GU2 7XH (United Kingdom)
- GSI, Planckstrasse 1, D-64291, Darmstadt (Germany)
- Henryk Niewodniczanski Institute of Nuclear Physics, PL-31-342, Krakow (Poland)
- Universidad de Santiago de Compostela, E-15706, Santiago de Compostela (Spain)
A series of experiments devoted to the study of the neutron-rich N{approx}426 region have been performed at GSI, Darmstadt, within the Rare Isotopes Investigations at GSI (RISING) project. The highlights of the experimental results from these highly successful experiments include the first observation of excited states in three neutron-rich N = 126 closed shell nuclei: (i) In {sup 205}Au{sub 79} the conversion electron decay of the {pi}h{sub 11/2}{sup -1} seconds lived isomeric state into the {pi}d{sub 3/2}{sup -1} ground-state has been observed. In addition the yrast structure has been established up to spin-parity (19/2{sup +}) via the observation of the decay of an isomeric state with configuration {pi}(h{sub 11/2}{sup -1})10(s{sub 1/2}{sup -1});(ii) In {sup 204}Pt{sub 78}, the yrast sequence has been observed following the internal decay of I{sup {pi}} = (5{sup -}), (7{sup -}) and (10{sup +}) isomeric states; (iii) In {sup 203}Ir{sub 77} excited states have been observed following the decay of an isomeric state with structure 'similar' to that in its {sup 205}Au isotone. Shell model calculations have been performed in order to get a deeper understanding of the structure of these N = 126 nuclei. It was found that in order to get a good description for all available information on the N = 126 isotones below lead, both on excitation energies and transition strengths, small modifications of the standard two-body matrix elements were required.
- OSTI ID:
- 21322882
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1165; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Description for N = 126 Isotones 210Po and 212Rn with Particle-Hole Excited Nucleon-Pair Approximation and Realistic Effective Interaction
Nuclear structure ''southeast'' of {sup 208}Pb: Isomeric states in {sup 208}Hg and {sup 209}Tl