High-spin states in ${}^{22}$Ne

Abstract

The structure of high-lying states in ${}^{22}$Ne has been studied using the ${}^{14}$C(${}^{12}$C,$\alpha$)${}^{22}$Ne reaction at E(${}^{12}$C)= 44 MeV. The spins were determined by measuring double ($\alpha$,$\alpha$) angular correlations. Selective population of the 9${}^{-}$ and 11${}^{-}$ states at E${}_x$=20.1 and 20.7 MeV, respectively, identifies those states as the 9${}^{-}$ and 11${}^{-}$ members of the first $K^{\pi }$ = 0${}^{-}$ band, whose lower members were investigated by a method using inverse kinematics and a thick gas target. The spin and parity of four other new levels were determined to be 9${}^{-}$ (21.5 MeV),12${}^{+}$ (22.1 MeV),9${}^{-}$ (25.0 MeV) and 8${}^{+}$ (22.9 MeV). The two levels 9${}^{-}$ and 12${}^{+}$ may belong to the rotational doublets.

12 pages, 5 figures