First Observation of Multiphonon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>γ</mml:mi> </mml:math> -Vibrations in an Odd-Odd Nuclear System

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.

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Publication Details

Journal
Physical Review Letters
Published
2025-12-24
DOI
https://doi.org/10.1103/1gy6-v3sb
Primary Topic
Nuclear physics research studies
Type
article
Field-Weighted Citation Impact
0.00

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article

First Observation of Multiphonon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>γ</mml:mi> </mml:math> -Vibrations in an Odd-Odd Nuclear System

B. Qi, J. Nyberg, F. Didierjean, J. Dudouet et al.
Physical Review Letters
Nuclear physics research studies
article

First Observation of Multiphonon <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mi>γ</mml:mi> </mml:math> -Vibrations in an Odd-Odd Nuclear System

B. Qi, J. Nyberg, F. Didierjean, J. Dudouet, C. Michelagnoli, O. Stézowski, M. Rejmund, G. Duchêne, Anonymous, W. Z. Xu, Y. X. Luo, S. Jehangir, H. Zhang, C. Schmitt, S. J. Zhu, B. Jacquot, S. Y. Wang, S. Bhattacharyya, G. H. Bhat, A. Lemasson, M. Abushawish, A. V. Ramayya, J. H. Hamilton, C. F. Jiao, J. A. Sheikh, E. Clément, R. Y. Dong, S. Sun, J. O. Rasmussen, Y. H. Kim
article en

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.

Physical Review LettersVol. 136(7)
Université Claude Bernard Lyon 1 (FR), Variable Energy Cyclotron Centre (IN), Industrial Research Institute (US), University of Kashmir (IN), Lawrence Berkeley National Laboratory (US), Shandong University (CN), Sun Yat-sen University (CN), Homi Bhabha National Institute (IN), Vanderbilt University (US), Direction de la Recherche Fondamentale (FR), Institut National de Physique Nucléaire et de Physique des Particules (FR), Grand Accélérateur National d'Ions Lourds (FR), Egyptian Government (EG), Institute of Nuclear Physics of Lyon (FR), Islamic University of Science and Technology (IN), Université de Strasbourg (FR), Tsinghua University (CN)
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, Lawrence Berkeley National Laboratory
Openalex Percentile: Top 22%
Nuclear physics research studies
DOIOpen Access PDFOpenAlex
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