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


Publication details

All authors or editorsJodidar, 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 seriesPhysical Review C

ISSN2469-9985

eISSN2469-9993

Publication year2025

Publication date03/01/2025

Volume111

Article number014303

PublisherAmerican Physical Society

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/physrevc.111.014303

Publication open accessNot 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 ,𝛼⁢3⁢pn) 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.


Keywordsparticle physicsnuclear physics


Contributing organizations


Ministry reportingYes

VIRTA submission year2025

Preliminary JUFO rating2


Last updated on 2025-05-02 at 15:50