S. L. Kraevskii, V. F. Solinov, and A. M. Zyabnev
Research Institute of Technical Glass, ul. Krzhizhanovskogo 29, Moscow, 117218 Russia
Received September 15, 1997
Abstract—The spectral transmission “holes” corresponding to the exciton absorption line of CuCl microcrys-
tals are found in the induced absorption spectra of irradiated copper halide photochromic glasses. The location
of the spectral hole peak and its halfwidth depend on the type of irradiation (X-ray or UV), which is explained
by inhomogeneous broadening of the exciton line due to the dimensional quantization effect and corresponds
to the 1.5-fold difference between the mean radii of microcrystals. The interaction of exciton with radiation-
induced intrinsic defects of a glass matrix is crucial for small-sized microcrystals, and confinement of exciton
by radiation-induced intrinsic defects of CuCl plays the major part for large-sized microcrystals. In the latter
case, the exciton spectral hole is accompanied by appearance of the absorption bands of these defects. The induced
absorption spectra of photochromic glass are interpreted in the wavenumber range 11 000–40 000 cm–1.
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