Phys.Rev. C 100, 044613 (2019)

S.Ahn, D.W.Bardayan, K.L.Jones, A.S.Adekola, G.Arbanas, J.C.Blackmon, K.Y.Chae, K.A.Chipps, J.A.Cizewski, S.Hardy, M.E.Howard, R.L.Kozub, B.Manning, M.Matos, C.D.Nesaraja, P.D.O'Malley, S.D.Pain, W.A.Peters, S.T.Pittman, B.C.Rasco, M.S.Smith, I.Spassova

Direct neutron capture cross section on ⁸⁰Ge and probing shape coexistence in neutron-rich nuclei

NUCLEAR REACTIONS ²H(⁸⁰Ge, p), (⁸⁰Ge, d), E=310 MeV; measured energies and angles of light-ion ejectiles, Ep, Ip, E(d), I(d), (⁸⁰Ge)p- and (⁸⁰Ge)d-coin, angular distributions of ejected proton using various silicon detectors at the Holifield Radioactive Ion Beam Facility at ORNL. Proton angular distributions analyzed using adiabatic wave approximation including finite range effects (ADWAFR) using FRESCO code, and by DWBA. ⁸¹Ge; deduced levels, J, π, spectroscopic factors, configurations, region of shape coexistence around N≈50. Systematics of low-lying levels in N=49 isotones ⁸¹Ge, ⁸³Se, ⁸⁵Kr and ⁸⁷Sr. Discussed implications for the magic nature of ⁷⁸Ni. ⁸⁰Ge(n, γ), E=0.01-3 MeV; calculated σ(E) for r-process simulations using direct-semidirect (DSD) model and the CUPIDO code.

doi: 10.1103/PhysRevC.100.044613