|Author||Kaiser, W. ♦ Garrett, C. G. B. ♦ Wood, D. L.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|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)|
|Learning Resource Type||Article|
|Publisher Department||Bell Telephone Labs., Inc., Murray Hill, N.J.|
|Organization||Bell Telephone Labs., Inc., Murray Hill, N.J.|
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