Shape evolution in neutron-rich Rh isotopes: First measurement of negative-parity isomers in 117,119Rh

Zhang, J. Z.; Chen, Z. Q.; Qu, T.; Wang, Y. K.; Li, Z. H.; Hua, H.; Zhao, P. W.; Watanabe, H.; Lorusso, G.; Yuan, C. X.; Nishimura, S.; Baba, H.; Benzoni, G.; Browne, F.; Chae, K. Y.; Crespi, F. C. L.; Doornenbal, P.; Fukuda, N.; Gernhäuser, R.; Gey, G.; Guo, C. Y.; Inabe, N.; Isobe, T.; Jiang, D. X.; Jin, Y.; Jung, H. S.; Jungclaus, A.; Kameda, D.; Kim, G. D.; Kim, Y. K.; Kojouharov, I.; Kondev, F. G.; Kubo, T.; Kurz, N.; Lane, G. J.; Li, X. Q.; Lou, J. L.; Luo, D. W.; Montaner-Pizá, A.; Moschner, K.; Naqvi, F.; Ni, L.; Niikura, M.; Nishibata, H.; Odahara, A.; Orlandi, R.; Patel, Z.; PodolyÁk, Zs.; Sakuraï, H.; Schaffner, H.; Simpson, G. S.; Soderstrom, P. -A; Steiger, K.; Sumikama, T.; Suzuki, H.; Takeda, H.; Taprogge, J.; Wendt, A.; Wu, H. Y.; Wu, J.; Xu, C.; Xu, Z. Y.; Yagi, A.; Ye, Y. L.; Yoshinaga, K.; Zhang, S. Q.; Zhang, S. Y.; Zhou, Z. X.

doi:10.1016/j.physletb.2025.140144

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Shape evolution in neutron-rich Rh isotopes: First measurement of negative-parity isomers in 117,119Rh

Zhang, J. Z.;
Chen, Z. Q.;
Qu, T.;
Wang, Y. K.;
Li, Z. H.;
... Kim, Y. K.;
외 62명

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초록

The β -delayed γ -ray spectroscopy of neutron-rich 117,119Rh isotopes has been investigated at the Radioactive Isotope Beam Factory of RIKEN. The 1/2− isomers in 117,119Rh have been identified for the first time. The systematics of energy differences between the 9/2+ and 1/2− states have been extended up to N=74, which shows a tendency to first increase with the neutron number N , then reach a maximum at N ≈ 68, and subsequently decrease. Self-consistent triaxial relativistic Hartree-Bogoliubov (TRHB) calculations highlight the crucial role of triaxial deformation, particularly in the positive-parity states, in driving the observed evolution of energy differences. A shape transition from axially symmetric to triaxial and back to axially symmetric deformation is suggested along the Rh isotopic chain. These findings provide new insights into the structure of neutron-rich nuclei in the A ∼ 110 region and motivate further studies of exotic isotopes in this region to explore the interplay between triaxiality and shell evolution.

키워드

Shape evolution; Triaxiality; Isomeric decays; Triaxial relativistic Hartree-Bogoliubov calculations; NUCLEAR-DATA SHEETS; COEXISTENCE; RIKEN; ROTATION; STATES

제목: Shape evolution in neutron-rich Rh isotopes: First measurement of negative-parity isomers in 117,119Rh

저자: Zhang, J. Z.; Chen, Z. Q.; Qu, T.; Wang, Y. K.; Li, Z. H.; Hua, H.; Zhao, P. W.; Watanabe, H.; Lorusso, G.; Yuan, C. X.; Nishimura, S.; Baba, H.; Benzoni, G.; Browne, F.; Chae, K. Y.; Crespi, F. C. L.; Doornenbal, P.; Fukuda, N.; Gernhäuser, R.; Gey, G.; Guo, C. Y.; Inabe, N.; Isobe, T.; Jiang, D. X.; Jin, Y.; Jung, H. S.; Jungclaus, A.; Kameda, D.; Kim, G. D.; Kim, Y. K.; Kojouharov, I.; Kondev, F. G.; Kubo, T.; Kurz, N.; Lane, G. J.; Li, X. Q.; Lou, J. L.; Luo, D. W.; Montaner-Pizá, A.; Moschner, K.; Naqvi, F.; Ni, L.; Niikura, M.; Nishibata, H.; Odahara, A.; Orlandi, R.; Patel, Z.; PodolyÁk, Zs.; Sakuraï, H.; Schaffner, H.; Simpson, G. S.; Soderstrom, P. -A; Steiger, K.; Sumikama, T.; Suzuki, H.; Takeda, H.; Taprogge, J.; Wendt, A.; Wu, H. Y.; Wu, J.; Xu, C.; Xu, Z. Y.; Yagi, A.; Ye, Y. L.; Yoshinaga, K.; Zhang, S. Q.; Zhang, S. Y.; Zhou, Z. X.

DOI: 10.1016/j.physletb.2025.140144

발행일: 2026-02

유형: Article

저널명: PHYSICS LETTERS B

권: 873

페이지: 1 ~ 9

언어: ENG

출판사: ELSEVIER

발행국가: 네덜란드

분량: 9 페이지

ISSN: E 1873-2445
P 0370-2693