Rotational Bands inNe22Excited by theO18(Li7,t)Ne22Reaction

Abstract

The $^{18}\mathrm{O}(^{7}\mathrm{Li},t)^{22}\mathrm{Ne}$ reaction has been studied at 12-MeV incident energy. Angular distributions have been extracted for 22 triton groups leading to states in $^{22}\mathrm{Ne}$ up to 8.59 MeV in excitation energy. The experimental angular distributions have been compared with the predictions of the Coulomb-distorted plane-wave model. $L$ values have been assigned and relative $\ensuremath{\alpha}$-cluster widths have been extracted for the strong transitions. Significant $\ensuremath{\alpha}$ clustering has been observed for 10 states in $^{22}\mathrm{Ne}$ between 6.24- and 8.59-MeV excitation energy. Spin and parity assignments have been made to these states from the combined results of the $^{18}\mathrm{O}(^{7}\mathrm{Li},t)^{22}\mathrm{Ne}$ and $^{21}\mathrm{Ne}(d,p)^{22}\mathrm{Ne}$ reaction. The classification of the $\ensuremath{\alpha}$-cluster states into rotational bands has been discussed within the framework of the SU(3) model.