Phys.Rev.Lett. 136, 072501 (2026)

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.Clement, F.Didierjean, R.Y.Dong, G.Duchene, 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

First Observation of Multiphonon γ-Vibrations in an Odd-Odd Nuclear System

RADIOACTIVITY ¹⁰⁴Nb(IT) [from ²⁵²Cf(SF)]; measured decay products, Eγ, Iγ, γ-γ-γ-, γ-γ-γ-γ-coin; deduced γ-ray energies, level scheme, isomeric state T_1/2. The Gammasphere with 101 high purity germanium detectors at the Lawrence Berkeley National Laboratory.

NUCLEAR REACTIONS ⁹Be(²³⁸U, X)¹⁰⁴Nb, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, multiphonon γ-vibrational bands, high-spin structures, B(M1)/B(E2). Comparison with triaxial projected shell model calculations. The EXOtic GAMma-ray spectrometer (EXOGAM) array and Advanced GAmma Tracking Array (AGATA) γ-ray tracking array, VAMOS++ spectrometer at the Grand Accelerateur National d'Ions Lourds (GANIL).

doi: 10.1103/1gy6-v3sb