FIZIKA A 8 (1999) 1 , 1-10

TEMPORAL EVOLUTION OF INTERMETALLIC DIFFUSE BAND SPECTRA

IRENA LABAZAN, DAVORKA AZINOVIĆ, SREĆKO GOGIĆ and SLOBODAN MILOŠEVIĆ
Institute of Physics, P.O.Box 304, HR-10000 Zagreb, Croatia


Received 10 December 1999; Accepted 24 May 1999

LiZn and LiCd vapour mixtures prepared in the heat-pipe oven are irradiated with pulsed excimer laser emission at 308 nm. Temporal evolution of the fluorescence spectra is observed showing that different processes occur such as multiphoton excitation, collisional energy transfer, photochemical reaction, relaxation etc. Temporal change of the LiZn and LiCd blue-green diffuse bands spectral shape is observed and interpreted in terms of previous spectral simulations. The effective lifetimes of different spectral features are determined.

PACS numbers: 33.10.-n, 33.20.Kf, 33.80.Gj
UDC 539.194, 539.196

Keywords: LiZn - LiCd vapour mixtures, pulsed excimer laser irradiation, temporal evolution of fluorescence spectra, multiphoton excitation, collisional energy transfer, photochemical reaction, relaxation, effective lifetimes
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