Phys.Rev. C 104, 054309 (2021)

S.Aydin, M.Ionescu-Bujor, N.Marginean, C.Costache, D.Bucurescu, N.Florea, T.Glodariu, A.Ionescu, A.Iordachescu, R.Marginean, C.Mihai, R.E.Mihai, A.Mitu, A.Negret, C.R.Nita, A.Olacel, S.Pascu, L.Stroe, R.Suvaila, S.Toma, A.Turturica

Lifetime measurements and evidence for triaxial nuclear shapes in ¹²⁷Cs

NUCLEAR REACTIONS ¹²¹Sb(¹²C, 2nα)¹²⁷Cs, E=54 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(ADO ratios), level T_1/2 by DSAM and by fast-timing method using an array of LaBr3(Ce) detectors and ROSPHERE array for γ detection at the FN Tandem accelerator of IFIN-HH-Bucharest. ¹²⁷Cs; deduced high-spin levels, J, π, bands, multipolarities, multipole mixing ratios, B(M1), B(E2), signature splitting S(J), configurations, evidence for triaxial nuclear shapes in the states described by the proton h_11/2 orbital, soft core for quadrupole deformation and shape asymmetry due to polarizing h_11/2 protons. Comparison with quasiparticle plus triaxial rotor (QTR) model predictions.

doi: 10.1103/PhysRevC.104.054309