A1 Journal article (refereed)
Natural solution of the low-lying level structure of 114 I from complementary measurements and new interpretation of the high-spin bands (2025)
Jodidar, P. M., Petrache, C. M., Astier, A., Gargano, A., De Gregorio, G., Guo, S., Lv, B. F., Zheng, K.K., Auranen, K., Briscoe, A., Greenlees, P. T., Grahn, T., Illana, A., Joukainen, H., Julin, R., Louko, J., Luoma, M., Jutila, H., Ojala, J., . . . Cederlöf, E. A. (2025). Natural solution of the low-lying level structure of 114 I from complementary measurements and new interpretation of the high-spin bands. Physical Review C, 111, Article 014303. https://doi.org/10.1103/physrevc.111.014303
JYU authors or editors
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Publication details
All authors or editors: Jodidar, P. M.; Petrache, C. M.; Astier, A.; Gargano, A.; De Gregorio, G.; Guo, S.; Lv, B. F.; Zheng, K. K.; Auranen, K.; Briscoe, A.,D.; et al.
Journal or series: Physical Review C
ISSN: 2469-9985
eISSN: 2469-9993
Publication year: 2025
Publication date: 03/01/2025
Volume: 111
Article number: 014303
Publisher: American Physical Society
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1103/physrevc.111.014303
Publication open access: Not open
Publication channel open access:
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/100023
Abstract
The complex low-spin structure of the proton-rich 11453 I 61 nucleus has been investigated with the JUROGAM 3 germanium array coupled with the MARA mass separator using the 58 Ni ( 64Zn ,𝛼3pn) fusion-evaporation reaction. The depopulation of the previously known high-spin bands to low-spin states is firmly established, fixing the excitation energies, spins and parities of the states. The present results combined with fragmentary communications and results published from the decay of separated mass-114 beams measured long time ago at ORNL and GSI, led to the conclusion that the previously known 6 s, 266 keV, 𝐼=(7) isomer has to be repositioned at 134 keV and its spin-parity changed to 4+. Three new isomers are identified from intensity imbalance of the populating and depopulating transitions, one at 204 keV with 𝐼=6+ and a half-life longer than several nanoseconds, and two at 635 and 966 keV with 𝐼=5− and 𝐼=7−, respectively, with half-lives of a few nanoseconds. The spins of one high-spin band are changed from odd to even and a new interpretation of the two resulting bands with even spins is proposed based on cranked Nilsson-Strutinsky calculations. From the comparison of the observed low-spin states with shell-model calculations it is suggested that the states of the ground-state cascade are oblate, while the other positive-parity states and the high-spin negative-parity bands are prolate.
Keywords: particle physics; nuclear physics
Contributing organizations
Ministry reporting: Yes
VIRTA submission year: 2025
Preliminary JUFO rating: 2