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laser action

International Astronomical Union Colloquium (1)

International Astronomical Union (1)

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Laser Action in Non-LTE Atmospheres
Donald H. Menzel
Journal:

International Astronomical Union Colloquium / Volume 2 / August 1970

Published online by Cambridge University Press:

08 February 2017, pp. 134-137

Print publication:

August 1970
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The radiative transfer equation is written in microscopic form, and from some simplifications on the ratio of occupation numbers for upper and lower level, a laser action is suggested.