Grodner, E.Kowalczyk, M.Kisielinski, M.Srebrny, J.Prochniak, L.Droste, ChRohozinski, S. G.2025-03-172025-03-1720222469-99852469-9993https://doi.org/10.1103/PhysRevC.106.014318https://hdl.handle.net/20.500.13099/1823The g factor of the isomeric I = 9(+) bandhead of the yrast states in Cs-128 is obtained from the time differential perturbed angular distribution measurement performed with the electromagnet at IPN Orsay. An external magnetic field of 2.146 T at the target position was attained with GAMIPE reaction chamber surrounded by four high-purity germanium detectors, of which two were low-energy photon spectrometer type. The results are in accordance with pi h(11/2) circle times nu h(11/)(2)(-1) I = 9(+) bandhead assignment and are discussed in the context of chiral interpretation of the Cs-128 nucleus as a composition of the odd proton, odd neutron, and even-even core with their angular momentum vectors. The obtained g-factor value was compared with predictions of the particle-rotor model. The experimental g factor corresponds to the nonchiral geometry of the isomeric bandhead. This observation indicates the existence of the chiral critical frequency in Cs-128 and may explain the absence of the chiral doublet members for I < 13<(h)over bar>.eninfo:eu-repo/semantics/openAccessTableBandsArticle10.1103/PhysRevC.106.0143181061Q2WOS:0008368483000012-s2.0-85135747802Q1