The hyperpolarizability of neon (${\gamma }_{\mathrm{Ne}}$) is determined by an electric-field-induced second-harmonic-generation (ESHG) experiment at several wavelengths in the visible region. The deviation from Kleinman symmetry is also measured. The dispersion curve obtained from this experiment allows one to critically assess the previous nonlinear-optical measurements for Ne and allows a reliable estimate of the static value of ${\gamma }_{\mathrm{Ne}}$. The bounds obtained for the static ${\gamma }_{\mathrm{Ne}}$ are 75 a.u. <${\gamma }_{\mathrm{Ne}<93\mathrm{}}$ a.u. The results of recent ab initio calculations are considered in the light of this revised estimate for ${\gamma }_{\mathrm{Ne}}$. .AE

• Received 28 September 1987

DOI:https://doi.org/10.1103/PhysRevA.37.3813