Raman Spectra of Solid Bromine under Pressure of up to 80 GPa

Abstract

The Raman scattering experiments for solid bromine were carried out under pressure of up to 80 GPa, at which pressure solid bromine undergoes the molecular dissociation. The frequency-pressure dependences for the vibrational A_g and B_3g modes and the librational A_g and B_3g modes were obtained. Their frequencies increased with an increase in pressure, in contrast to the softening of the vibrational B_3g mode and the librational A_g mode in the case of solid iodine.