The Cooling of a Gas by Radiation

ISBN: 9781333551650 出版年：2016 页码：41 Ernest Bauer Ta-You Wu Forgotten Books

To simplify the calculations we shall consider a gas composed of atoms having two electronic states 1 and 2 and distributed in space in a given manner (such as the gas in the atmosphere). Transitions between these two states can take place by collisions and by emission or absorption of radiation. In a.