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Zeitschrift für Physik D Atoms Molecules and Clusters

The einstein a-coefficient of spontaneous emission: a relativistic calculation in the Heisenberg representation

A. O. Barut, Yousef I. Salamin

Published Mar 1, 1991• 4 citations
Publisher
DOI
10.1007/bf01426610

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Spontaneous radiation by three-level atoms in a dissipative medium (such as plasma) has been investigated by Langevin equations and the modified Weisskopf-Wigner approximation. General formulae for calculating spontaneous emission coefficients, i.e. Einstein A coefficients, are presented. Numerical calculation shows that the dissipation of plasmas can modify the spontaneous emission coefficients significantly and causes a pit in the coefficient-density curves for relatively low temperature plasmas, and also a pit in the coefficient-temperature curves.