THE SPECTRA OF RARE EARTH IONS.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1962
- Accession Number
- AD0611157
Entities
People
- G. H. Dieke
Organizations
- Johns Hopkins University