Accession Number:

AD0631973

Title:

RESEARCH IN THE USE OF LIGHT AMPLIFICATION BY STIMULATED EMISSION IN ENERGY TRANSFER.

Descriptive Note:

Final scientific rept., 15 Nov 64-15 Nov 65,

Corporate Author:

GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s):

Report Date:

1966-01-01

Pagination or Media Count:

48.0

Abstract:

The kinetics of phosphorescence decay of ten organic compounds were measured. Some decay rates were found to be exponential within 1, while others were either non-exponential at all stages or were resolved into a sum of exponential. The existence of multiple metastable triplet levels is proposed as the explanation of non-exponential decay. The usefulness of triplet -triplet absorption measurements in conjunction with phosphorescence decay measurements was demonstrated. It was shown that energy transfer from the donor is the rate controlling step in the phosphorescence decay of biphenyl in the carbazole-biphenyl system. An extremely efficient transfer of energy was observed from the triplet state of pyrazine to the singlet of a europium chelate, resulting in prolonged europium fluorescence. The observed kinetics can be explained in terms of a difference in the transfer efficiency of two forms of the pyrazine triplet. Author

Subject Categories:

  • Organic Chemistry
  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE