Accession Number : AD0669165

Title :   REFINEMENT OF THE CALCULATION OF FORBIDDEN SPECTRAL LINES (OB UTOCHENENII RASCHETA AZPRESHCHENNYKH SPEKTRALNYKH LINII),

Corporate Author : AMERICAN METEOROLOGICAL SOCIETY BOSTON MASS

Personal Author(s) : Yutsis,A. P. ; Vizbaraite,Ya. I.

Report Date : OCT 1965

Pagination or Media Count : 4

Abstract : Forbidden spectral lines include electric quadrupole and magnetic dipole transitions. In view of the practical impossibility of laboratory study of such lines, their theoretical calculation acquires special significance. It turns out that a rather significant refinement of the calculation is realized by the selection of a suitable type of coupling in the initial and final states of the atom or ion. If the examination involves equivalent electrons, the coupling in the general case is intermediate between two types of homogeneous coupling. In the case of nonequivalent electrons, nonhomogeneous couplings acquire great significance. The first of these couplings are formally simple, but the second correspond to consecutive addition of momenta. The results of allowance for nonhomogeneous couplings in the study of forbidden lines are illustrated with the two-electron spectrum as an example. (Author)

Descriptors :   (*ATOMIC SPECTROSCOPY, *SELECTION RULES(PHYSICS)), LINE SPECTRA, ELECTRON TRANSITIONS, NUMERICAL ANALYSIS, INTERACTIONS, ATOMIC ENERGY LEVELS, USSR

Subject Categories : Astrophysics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE