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Laser Action in Non-LTE Atmospheres

Published online by Cambridge University Press:  08 February 2017

Donald H. Menzel
Donald H. Menzel*
Affiliation:
Harvard College Observatory and Smithsonian Institution Astrophysioal Observatory

Abstract

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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.

Keywords

radiative transfelaser action
Type
Part B. Theoretical Methods for Handling Non-LTE Problems
Information
International Astronomical Union Colloquium , Volume 2: Spectrum Formation in Stars With Steady-State Extended Atmospheres , August 1970 , pp. 134 - 137
Copyright
Copyright © 1970