Accession Number:

AD0611157

Title:

THE SPECTRA OF RARE EARTH IONS.

Descriptive Note:

Final rept.,

Corporate Author:

JOHNS HOPKINS UNIV BALTIMORE MD

Personal Author(s):

Report Date:

1962-01-31

Pagination or Media Count:

17.0

Abstract:

The primary purpose of the work was to obtain the energy levels and other data of the free trivalent rare earth ions in order to have a sound basis for comparison with the levels of the same ions in solid state matter. The procedure of attacking the problem was to establish first the proper experimental conditions for obtaining and separating the various stages of ionization. A new method was developed by studying the time decay of the individual lines in the afterglow of a spark with time resolution of the order of 0.0000001 sec. The third and fourth spectra of the following rare earths were photographed extensively Pr, Nd, Gd, Ho, Er, Yb. Exploratory results were achieved on the remaining ones except Pm. Wave length measurements, often 20 000 to 30 000 lines per element, were made on most of the six elements. The spectra of divalent ions of Pr and Yb were also analyzed.

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE