Direct probing of the radiation field in optically thick environments

Details Direct probing of the radiation field in optically thick environments Direct probing of the radiation field in optically thick environments

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jqsrt..39...49s&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer (ISSN 0022-4073), vol. 39, Jan. 1988, p. 49-55. Research supported b

Physics

Optics

Optical Thickness, Radiation Detectors, Radiation Distribution, Radiative Transfer, Fiber Optics, Laser Induced Fluorescence, Magnesium, Metal Vapors, Vibrational Spectra

Scientific paper

The directional dependence of escaping resonance radiation after an initial excitation in an optically thick atomic magnesium vapor is measured using a small sapphire rod as a probe. The rod acts as a light pipe to bring the radiation directly out from deep within the vapor. The time-dependent signal is observed in various directions relative to the initial excitation and a significant anisotropy is observed, especially at early times. The anisotropy is not strongly dependent on the argon buffer gas pressure, and is greater further from the initial excitation. The signal is compared with a calculated signal under the assumption of complete redistribution.

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