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VOLUME 40 (1984) | ISSUE 4 | PAGE 145
Effect of hydrostatic pressure on the excitonic spectra of CsI crystals
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.