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arXiv · 2410.00389

Precise Mass Measurement of the Longest Odd-Odd Chain of \boldmath $1^+$ Ground States

B. Liu·M. Brodeur·J. A. Clark·I. Dedes·J. Dudek·F. G. Kondev·D. Ray·G. Savard·A. A. Valverde·A. Baran·D. P. Burdette·A. M. Houff·R. Orford·W. S. Porter·F. Rivero·K. S. Sharma·L. Varriano
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Abstract

Precise mass measurements of the ground and isomeric states of the odd-odd $^{108, 110, 112, 114, 116}$Rh were performed using the Canadian Penning Trap at Argonne National Laboratory, showing good agreement with recent JYFLTRAP measurements. A new possible isomeric state of $^{114}$Rh was also observed. These isotopes are part of the longest odd-odd chain of identical ground-state spin-parity assignment of 1$^+$, spanning $^{104-118}$Rh, despite being in a region of deformation. Realistic phenomenological mean-field calculations using ``universal'' Wood-Saxon Hamiltonian were performed, which explained this phenomenon for the first time. In addition, multi-quasiparticle blocking calculations were performed to study the configuration of low-lying states in the odd-odd Rh nuclei, elucidating anomalous isomeric yield ratio observed for $^{114}$Rh.

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B. Liu, M. Brodeur, J. A. Clark, I. Dedes, J. Dudek, F. G. Kondev, D. Ray, G. Savard, A. A. Valverde, A. Baran, D. P. Burdette, A. M. Houff, R. Orford, W. S. Porter, F. Rivero, K. S. Sharma, L. Varriano. 2024-10-01. Precise Mass Measurement of the Longest Odd-Odd Chain of \boldmath $1^+$ Ground States. https://arxiv.org/abs/2410.00389

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