Properties of Kπ=0+1, Kπ=2-, and Kπ=0-1 bands of 20Ne probed via proton and alpha inelastic scattering
Abstract
The Kπ=0+1, Kπ=2-, and Kπ=0-1 bands of 20Ne are investigated with microscopic structure and reaction calculations via proton and α inelastic scattering off 20Ne. Structures of 20Ne are calculated with variation after parity and total angular momentum projections in the antisymmetrized molecular dynamics(AMD). The Kπ=0+1 and Kπ=0-1 bands have 16O+α cluster structures, whereas the Kπ=2- band shows a 12C+2α-like structure. Microscopic coupled-channel calculations of proton and α scattering off 20Ne are performed by using the proton-nucleus and α-nucleus potentials, which are derived by folding the Melbourne g-matrix NN interaction with AMD densities of 20Ne. The calculation reasonably reproduces the observed cross sections of proton scattering at Ep=25--35 MeV and α scattering at Eα=104--386 MeV. Transition properties from the ground to excited states are discussed by reaction analyses of proton and α inelastic processes. Mixing of the Kπ=2- and Kπ=0-1 bands is discussed by detailed analysis of the 0+1 3-1 and 0+1 3-2 transitions. For the 3-1 state, mixing of the Kπ=0-1 cluster component in the Kπ=2- band plays an important role in the transition properties.