A variation-after-projection Hartree-Fock calculation shows that the rms radius of ${}_{}{}^{20}{}_{}{}^{}\mathrm{Ne}$ decreases with increasing spin in the ground-state band. This decrease is consistent with the significant reduction in $\alpha$ width between the $6^{+}$ and the $8^{+}$ states. It also leads to the theoretical $B\left(E2\mathrm{}\right)\mathrm{}$ values reproducing the measured values exceedingly well.

• Received 31 August 1972

DOI:https://doi.org/10.1103/PhysRevLett.29.1525