Structure of ${}^{23}$Al from a multi-channel algebraic scattering model based on mirror symmetry

Abstract

The proton-rich nucleus ${}^{23}$Al has a ground state just 123 keV below the proton drip-line, and as a result comparatively little is known experimentally about its properties, as with many such nuclei. Theoretical investigations have tended to model exclusively the ground and first one to three excited states known. In this paper, we theoretically model most of the known spectrum, and predict what states may as yet be unobserved. We use the multichannel algebraic scattering (MCAS) method to describe states as resonances of a valence proton coupled to a ${}^{22}$Mg rotor core. Six states with low-excitation energies and defined $J^{\pi }$ are matched, and we make the first prediction of the properties of four others and propound the possible existence of several more.

15 pages, 12 figures

References in corpus (4)

• Mirror energy difference and the structure of loosely bound proton-rich nuclei around A = 20
• In-beam gamma-ray spectroscopy at the proton dripline: 23Al
• Low-energy radiative-capture reactions within two-cluster coupled-channel description
• Coupling to two target-state bands in the study of the n+22Ne system at low energy

Cited by in corpus (2)

• Mass-15 nuclei and predicting narrow states beyond the proton drip line
• An effective two-body model for spectra of clusters of ${}^2$H, ${}^3$H, ${}^3$He, and ${}^4$He with ${}^4$He, and ${}^2$H-${}^4$He scattering