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Isomer studies in the vicinity of the doubly-magic nucleus 100Sn: Observation of a new low-lying isomeric state in 97Ag.
- Source :
-
Physics Letters B . Mar2020, Vol. 802, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Long-lived isomeric states in 97Ag and 101−109In were investigated with the FRS Ion Catcher at GSI. In the isotope 97Ag, a long-lived (1 / 2 −) isomeric state was discovered, and its excitation energy was determined to be 618(38) keV. This is simultaneously the first discovery of a nuclear isomeric state by multiple-reflection time-of-flight mass spectrometry. The measured excitation energies were compared to large-scale shell-model calculations, which indicated the importance of core excitation around 100Sn. Furthermore, advanced mean-field calculations for the 97Ag nucleus and relevant neighboring nuclei were performed, which have contributed to a better understanding of the repetitive appearance of certain isomeric structures in neighboring nuclei, and which have supported the discovery of the isomeric state in 97Ag in a global shell-evolution scheme. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TIME-of-flight mass spectrometry
*EXOTIC nuclei
*ISOMERS
*NUCLEAR structure
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 802
- Database :
- Academic Search Index
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- 141828842
- Full Text :
- https://doi.org/10.1016/j.physletb.2020.135200