Raman spectroscopy at high pressures applied to the fundamental vibration of N2 in solid argon and nitrogen

The matrix isolation technique, Raman scattering, and high-pressure technology have been combined and applied to the study of nitrogen molecules in Ar and in N2 crystals. The aim of the study is to gain a deeper insight into the following physical questions: (1) Are the assumptions used in models for matrix energy shift calculations valid? (2) How strong is the coupling between the defect vibration and the lattice modes? (3) Which anharmonic contributions are responsible for observed temperature and pressure shifts?