Assignments to the $K^{\pi }=0_2^{+},0_4^{+},0_5^{+}, \mathrm{and} 0_1^{-}$ rotational bands of ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ (all characterized by large reduced width for alpha decay to the ground state of ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$) are critically discussed. Some past assignments seem to be in error. The $0_5^{+}$ band is new. Promising candidates are suggested for gaps in the $K^{\pi }=1^{-} \mathrm{and} 2^{-}$ bands. Verification of assignments and conjectures needs more work, both experimental and theoretical.

[NUCLEAR STRUCTURE Assignments of ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ levels to rotational bands.]

• Received 26 September 1983

DOI:https://doi.org/10.1103/PhysRevC.29.276