Refinement of then-αandp-αfish-bone potential

Abstract

The fishbone potential of composite particles simulates the Pauli effect by nonlocal terms. We determine the n − α and p − α fish-bone potential by simultaneously fitting to the experimental phase shifts. We found that with a double Gaussian parametrization of the local potential can describe the n − α and p − α phase shifts for all partial waves.

Shape coexistence in neutron-rich strontium isotopes at N = 60

“…An extremely strong electric monopole transition of ρ 2 (E0) = 0.185(50) was observed between these two states [10,11], indicating the presence of a sizeable deformation and strong mixing between the configurations. In 98 Sr, the ground-state band has a rotational character, and the large B(E2) values between its members, deduced from lifetime measurements [12,13,14,15,8,16,17], are consistent with a deformed character of the ground state. A low-lying 0 + 2 state at 215.3 keV was established [18] and interpreted as the band head of a presumably spherical structure.…”