Phys.Rev. C 108, 014309 (2023)

Madhu, A.Y.Deo, K.Yadav, D.Sahoo, Y.Y.Wang, Y.K.Wang, J.Meng, S.Suman, S.K.Tandel, A.Sharma, I.Ahmed, K.Katre, K.Rojeeta Devi, S.Dutt, S.Kumar, Yashraj, S.Muralithar, R.P.Singh

Coexisting single-particle excitations and octupole correlations in the transitional nucleus ²¹⁷Ra

NUCLEAR STRUCTURE ²⁰⁸Pb(¹²C, 3n)²¹⁷Ra, E=68, 72, 80 MeV; measured Eγ, Iγ, X-rays, γγ-coin, γγ(θ). ²¹⁷Ra; deduced levels, J, π δ, high-spin states, ratios of directional correlations of oriented states (DCO ratios), transition polarization asymmetry, linear polarization, cumulative T_1/2 of the 2301- and 2394-keV states, configurations, bands structure and energy splittings. Comparison to theoretical calculations using reflection-asymmetric triaxial particle rotor model (RAT-PRM). From features of the simplex bands suggested that ²¹⁷Ra exhibits an intermediate behavior between the extremes of spherical and octupole-deformed nuclei. Systematics of energy splittings and B(E1)/B(E2) ratios for ²¹⁶Fr, ²¹⁷Ra, ²¹⁸Ac, ²¹⁹Th, ²³²Th. Indian National Gamma Array (INGA) comprising of 13 Compton suppressed clover detectors and one low-energy photon spectrometer (LEPS) at 15UD Pelletron accelerator of Inter-University Accelerator Centre (New Delhi).

doi: 10.1103/PhysRevC.108.014309