Effect of hydrostatic pressure on the excitonic spectra of CsI crystals
Kuznetsov A. I. , Laisaar A. I. , Shcherbakov V. S. , Zavt G. S.
The excitonic reflection spectra of Csl crystals under pressures up to 12.5 kbar and Τ — 80 К are measured. The hydrostatic deformation potential for the first three excitonic transitions is determined. The interaction of excitonic levels is found to satisfy the Wigner-Neumann nonintersection rule.