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Author Kaiser, W. ♦ Garrett, C. G. B. ♦ Wood, D. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ ABSORPTION ♦ BEAMS ♦ CALCIUM FLUORIDES ♦ EMISSION ♦ ENERGY LEVELS ♦ EXCITATION ♦ FLUORESCENCE ♦ FREQUENCY ♦ IONS ♦ LIGHT ♦ LOW TEMPERATURE ♦ MASERS ♦ MEASURED VALUES ♦ OPTICAL SYSTEMS ♦ PHOTOGRAPHY ♦ SAMARIUM ♦ SIGNALS ♦ SPECTRA
Abstract Measurements are reported of absorption, emission, and activation spectra in CaF/sub 2/: Sm/sup 2+/, and also of fluorescence lifetime. A revised level scheme is proposed. Observations of optical maser effects were made at liquid hydrogen and liquid helium temperatures over a wide range of Pumping intensities. For illumination in the 6400-A band, the threshold intensity of illumination was about 20 w cm/sup -2/. Observations are reported of the dependence of the intensity of the maser beam on the pumping intensity. Photographic observations, made both with or without a Fabry-Perot etalon, show that on one particular sample five distinct frequencies were present in the maser signal, and that the number of modes excited was of the order of 1000. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1961-08-01
Publisher Department Bell Telephone Labs., Inc., Murray Hill, N.J.
Journal Physical Review
Volume Number 123
Organization Bell Telephone Labs., Inc., Murray Hill, N.J.


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