Phys.Rev. C 106, 014318 (2022)

E.Grodner, M.Kowalczyk, M.Kisielinski, J.Srebrny, L.Prochniak, Ch.Droste, S.G.Rohozinski, Q.B.Chen, M.Ionescu-Bujor, C.A.Ur, F.Recchia, J.Meng, S.Q.Zhang, P.W.Zhao, G.Georgiev, R.Lozeva, E.Fiori, S.Aydin, A.Nalecz-Jawecki

Examination of nuclear chirality with a magnetic moment measurement of the I=9 isomeric state in ¹²⁸Cs

NUCLEAR MOMENTS ^128mCs; measured Eγ, γ-intensity oscillation spectra, oscillating ratios, Larmor frequency of precession with a magnetic field of about 0.7 T, time differential perturbed angular distribution (TDPAD) of γ rays from the isomer using ¹²²Sn(¹⁰B, 4n)¹²⁸Cs, E=55 MeV reaction at the Tandem accelerator of IPN Orsay; deduced g-factor and configuration of the isomeric 9+ bandhead of the yrast states. Comparison with theoretical predictions for shell-model configurations, and chiral interpretation of ¹²⁸Cs nucleus as a composition of the odd proton, odd neutron, and even-even core with their angular momentum vectors.

NUCLEAR STRUCTURE ¹²⁸Cs; calculated levels, J, π, bands, B(E2), B(M1), g factors using quantum angular momentum algebra and semiclassical calculations, in the framework of many-particle-many-hole Particle Triaxial Rotor Model. Evidence for the existence of chiral critical frequency, and absence of chiral doublet members for J<13 states.

doi: 10.1103/PhysRevC.106.014318