Phys.Rev. C 97, 044309 (2018)

Pragati, A.Y.Deo, S.K.Tandel, S.S.Bhattacharjee, S.Chakraborty, S.Rai, S.G.Wahid, S.Kumar, S.Muralithar, R.P.Singh, I.Bala, R.Garg, A.K.Jain

Parity doublet structures in doubly-odd ²¹⁶Fr

NUCLEAR REACTIONS ²⁰⁸Pb(¹¹B, 3n), E=54-62 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), γγ(linear polarization) using the INGA array at the 15-UD pelletron accelerator facility of IUAC, New Delhi. ²¹⁶Fr; deduced high-spin levels, J, π, parity doublet (simplex-partner) structures, B(E1)/B(E2) ratios, and enhancement of octupole correlations. Systematics of E1 energy splitting, and angular momentum versus rotational frequency plots for ²¹⁶Fr, ^219,223Th, ^218,220Ac, and B(E1)/B(E2) ratios for ²¹⁶Fr and ²¹⁸Ac.

doi: 10.1103/PhysRevC.97.044309