Year: 2025
Type: article
Abstract: The identification of the first multiphonon γ-vibrational bands in an odd-odd neutron-rich nucleus of the nuclear chart is presented. These high-spin structures of hard to access _{41}^{104}Nb_{63}, produced in fission, were studied by combining a spectrometer with isotopic resolution coupled to a γ-ray tracking array and independently from high-fold γ coincidence measurements. Triaxial projected shell model calculations for the high-spin states are in good agreement with the measured observables for the yrast, one-phonon, and two-phonon γ bands. The possibility of an oblate shape of an isomeric state and coexistence of triaxial and oblate configurations is investigated from the decay of the 141 keV isomer. The present Letter illustrates the robustness of vibration excitations in the presence of an odd valence proton and neutron as well as the possibly coexisting shapes beyond the N=60 transitional region.
Source: Physical Review Letters
DOI: 10.1103/1gy6-v3sb
Authors: E. H. Wang, M. Abushawish, J. H. Hamilton, A. Navin, S. Bhattacharyya, J. Dudouet, G. H. Bhat, J. A. Sheikh, S. Jehangir, S. Y. Wang, S. Sun, B. Qi, M. Rejmund, A. Lemasson, Y. H. Kim, E. Clément, F. Didierjean, R. Y. Dong, G. Duchêne, B. Jacquot, C. F. Jiao, Y. X. Luo, C. Michelagnoli, A. V. Ramayya, J. O. Rasmussen, C. Schmitt, O. Stezowski, W. Z. Xu, H. Zhang, S. J. Zhu
Institutions: Shandong University, Vanderbilt University, Lyon 1 Université, Institut National de Physique Nucléaire et de Physique des Particules, Institut de Physique des 2 Infinis de Lyon, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Grand Accélérateur National d'Ions Lourds, Variable Energy Cyclotron Centre, Homi Bhabha National Institute, University of Kashmir, Islamic University of Science and Technology, Centre National de la Recherche Scientifique, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Sun Yat-sen University, Lawrence Berkeley National Laboratory, Tsinghua University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: U.S. Department of Energy, Vanderbilt University, Shandong University, European Commission, National Natural Science Foundation of China, Indo-French Centre for the Promotion of Advanced Research, Institute for Basic Science, Seventh Framework Programme, Lawrence Berkeley National Laboratory
OpenAlex ID: W7117156949