Accession Number : ADD095331

Title :   The First Spectrum of Hafnium (HF I).

Descriptive Note : Final rept.,

Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM

Personal Author(s) : Meggers, William F ; Moore, Charlotte E

Report Date : Jul 1976

Pagination or Media Count : 122

Abstract : The present publication terminates the work on the analysis of HfI which was started by the late W.F. Meggers in 1928 and left unfinished in 1966. His final line list contains some 4700 lines of which about 67 percent have been classified. Observerd g-values are known for 198 levels. The reliability of the Zeeman observations is indicated in tables containing sums of Observed and Lande g-values for selected groups of 'even' and 'odd' terms. An attempt has been made to continue Meggers' analysis in LS-coupling as far as possible. This coupling is not rigorous in HfI, and many intervals are irregular. Consequently, the levels are given also in numerical order with the even and odd levels presented in separate tables. An ionization limit of 54700+or- 600 cm -1, giving an ionization potential of 6.78 +or- 0.07 eV has been derived from a two-member series. The long line lists are given in two Appendices: Appendix A contains the observed Zeeman data for the individual lines, 531 in all; Appendix B consists of the complete line list of observed and classified lines. By far the greater part of the analysis is that Meggers. Detailed notes explain changes that have been introduced and additions to this work. (Author)

Descriptors :   *HAFNIUM, *SPECTRUM ANALYSIS, *SPECTRAL LINES, TABLES(DATA), NUMERICAL ANALYSIS, COUPLING(INTERACTION), ZEEMAN EFFECT

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Inorganic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE