Accession Number : ADD095028

Title :   Atomic Transition Probabilities for Forbidden Lines of the Iron Group Elements. (A Critical Data Compilation for Selected Lines),

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Smith, M W ; Wiese, W L

Report Date : Jan 1973

Pagination or Media Count : 38

Abstract : Atomic transition probabilities for about 750 forbidden spectral lines for elements of the iron group, specifically V, Cr, Mn, Fe, Co, and Ni, have been critically evaluated and compiled using all available literature sources. The selection of the spectra and elements has been made primarily according to their astrophysical importance. The data are presented in separate tables for each element and stage of ionization, and for each ion the data are arranged according to multiplets. For each line within a multiplet the transition probability for spontaneous emission is listed along with the standard spectroscopic designation, the wavelength, the statistical weights, and the energy levels of the upper and lower states. In addition, the estimated accuracy and the source are indicated. In short introductions which precede the individual tables for the ions the main justifications for the choice of the adopted data and for the accuracy rating are discussed. A general introduction contains a detailed discussion of the critical factors entering into the calculations. It also includes detailed comparisons of calculated data with astrophysical observations and a few laboratory results, which serve as a valuable indication for the validity of the estimated accuracies. (Author)

Descriptors :   *ATOMIC SPECTRA, *ELECTRON TRANSITIONS, *PROBABILITY, *SPECTRAL LINES, *IRON COMPOUNDS, STATISTICAL PROCESSES, EXPERIMENTAL DATA, TABULATION PROCESSES, EMISSION SPECTRA, ESTIMATES, ACCURACY, VALIDATION, ATOMIC ENERGY LEVELS, ASTROPHYSICS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE