LIQUID LASER PARAMETERS.
Semiannual technical rept., 1 Aug 65-31 Jan 66,
GENERAL PRECISION INC LITTLE FALLS N J AEROSPACE GROUP
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Studies were made of europium complexes of hexamethyl phosphoramide triethyl phosphate, and tri-n-butyl phosphate, which are promising direct-excitation liquid laser materials. An overall quantum efficiency of 0.5 for fluorescence was measured. It was found that complex formation is essentially complete when the Eu concentration is below 0.2 M even when hydrated Eu salts are used. The excess of 5D0 states required for laser action was calculated. A laser threshold of 6.3 wattscu cm per Angstrom interval of the absorption band is calculated on the basis of these data for a 0.02 M europium complex in a 5 cm tube. Additional compounds prepared include triethyl phosphate complexes of SmCl3, NdCl3, PrCl3, and TbCl3, which resemble the EuCl3 complexes also EuCl3 complexes with triphenyl phosphate, urea, thiourea, dimethyl sulfoxide, dimethyl formamide, dimethyl acetamide, and tetramethylurea. Fluorescence in the complexes having CO and SO ligands is enhanced over that in aqueous Eu solutions, but not as much as in PO complexes. The formation of precipitates from heated EuCl3 - alkyl phosphate complexes was further studied and a formula for the precipitate is proposed.
- Radiation and Nuclear Chemistry
- Lasers and Masers