Fig. 4: Systematic behaviour of radon isotopes.
From: Addendum: The observation of vibrating pear-shapes in radon nuclei
a Systematics of the energies for different spins of low-lying positive-parity (black) and negative-parity states (red) in radon isotopes; b cartoon illustrating how the octupole phonon vector aligns with the rotation (R) vector (which is orthogonal to the rotating bodyʼs symmetry axis) so that I = R + 3\(\hbar\) and \(\Delta i_x = 3\hbar\); c difference in aligned spin for negative- and positive-parity states in 218-224Rn. The dashed line at \(\Delta i_x = 0\) is the expected value for static octupole deformation.
