Accession Number:

AD0654047

Title:

INTERPRETATION OF THE OPTICAL SPECTRUM OF YB3+ IN CDF2.

Descriptive Note:

Doctoral thesis,

Corporate Author:

POLYTECHNIC INST OF BROOKLYN N Y

Personal Author(s):

Report Date:

1967-06-01

Pagination or Media Count:

81.0

Abstract:

The optical absorption spectra of Yb3 in CdF2 and of Yb3 in CdF2 in the presence of various co-dopants such as Na, Y3, and Eu3 were recorded and the oscillator strengths of the main absorptions of the Yb3 in the 10,000cm region were calculated. Also, the Electron Spin Resonance ESR spectra of Yb3 in CdF2 and Yb3 in CdF2 in the presence of Na, 2 Y3 and 10 Y3 were recorded. Non-cubic spectra were observed only in the case of the Yb3 -Na -CdF2 and Yb3 -10 Y3 -CdF2 samples. The former non-cubic spectrum was interpreted assuming a rhombic distortion with the major distortion axis along the 110 direction, while the latter could not be interpreted due to the broadness of the absorptions. From the results of these measurements and the comparison to the optical spectra of Yb3 in other systems, it has been concluded that the previous interpretation of the optical spectrum of Yb3 in CdF2 is incorrect. It is the contention of this thesis that the main absorption line at 10,250cm is not due to an internal f-f transition but is due to some other mechanism. Possible mechanisms are proposed based on some of the unusual physical properties of trivalent rare earth ions in CdF2. Author

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE