Higher-order dipole-polarizabilities and intermolecular interaction potential of P4 clusters obtained from collision-induced light scattering measurements

Collision-induced light scattering spectra of phosphorus vapour measured at 1000 K and density 132 mol m−3 are used to deduce a Lennard–Jones type (15-6) intermolecular interaction potential U(R), the dipole–quadrupole polarizability A, and dipole–octopole polarizability E of P4 clusters. Using a recent experimental value of the dipole–dipole polarizability α0=14.42×10−30 m3 at λ=514.5 nm, the experimentally recorded depolarized interaction-induced Raman spectra are best fitted with σ=4.4×10−10 m, ϵ/k=700 K, A=(6±2)×10−40 m4, and |E|=(127±17)×10−50 m5. The analysis is hampered by the existence of the ν3–ν2 vibrational combination band at 98 cm−1.