Multi-phonon γ vibrational bands and chiral vibrations in the A∼100 neutron-rich region

Multi-phonon γ vibrational bands and chiral vibrations in the A∼100 neutron-rich region

We present experimental evidence for the one- and two-phonon γ vibrational bands in the isotopes 103−108Mo by analyzing high-statistics γ-γ-γ and γ-γ-γ-γ coincidence data from the spontaneous fission of 252Cf. The consistency of the one- and two-phonon γ bands in both odd- and even-mass isotopes wit...

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Main Authors: Wang E.H., Abushawish M., Hamilton J.H., Dudouet J., Navin A., Bhattacharyya S., Stezowski O., Bhat G., Sheikh J.A., Jehangir S., Rejmund M., Lemasson A., Clément E., Sun S., Zhang H., Xu W.Z., Wang S.Y., Qi B., Jiao C.F., Luo Y.X., Rasmussen J.O., Zhu S.J.
Format: Article
Language:English
Published: EDP Sciences 2025-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2025/09/epjconf_nsd2024_00022.pdf
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Summary:We present experimental evidence for the one- and two-phonon γ vibrational bands in the isotopes 103−108Mo by analyzing high-statistics γ-γ-γ and γ-γ-γ-γ coincidence data from the spontaneous fission of 252Cf. The consistency of the one- and two-phonon γ bands in both odd- and even-mass isotopes within this range provides a robust test for microscopic theories. Additionally, we have identified evidence for one-, two-, and possibly three-phonon γ bands in 103,105Nb. Triaxial projected shell model calculations successfully reproduce the level structures and align well with the excitation energies of the observed one- and two-phonon γ bands. The potential existence of three-phonon γ bands in 103,105Nb is further supported by recent particle-vibration coupling model calculations. Furthermore, chiral vibrational bands have been observed in 104,106Mo.
ISSN:2100-014X

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