Terbium chloride--aluminum chloride vapor system. II. Fluorescence

Journal Article · Thu Jan 15 04:00:00 EST 1981 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.441182· OSTI ID:6658713

Caird, J A; Hessler, J P; Carnall, W T; Williams, C W

Measurements of the fluorescence spectra and fluorescence decay kinetics of the vapor complex formed at elevated temperatures between TbCl/sub 3/ and AlCl/sub 3/ have been made in the 350 to 700 nm wavelength range. The principal lines in the spectra were identified as emission from the /sup 5/D/sub 4/, /sup 5/D/sub 3/, and the /sup 5/G/sub 6/ energy levels of the Tb/sup 3 +/ ion. The radiative lifetime of the /sup 5/D/sub 4/ level at low temperatures was found to be 3.88 ms, and was used to determine the oscillator strenghts of the /sup 5/D/sub 4/..-->../sup 7/F/sub J/ (J=0 through 6) transitions after their branching ratios were measured. The peak cross section for stimulated emission on the strong /sup 5/D/sub 4/..-->../sup 7/F/sub 5/ transition was found to be 2.87 x 10/sup -21/ cm/sup 2/ at lambda=543 nm. A population inversion of 10/sup 18/ cm/sup -3/ could produce a small signal gain of 30% per meter on this transition, indicating that laser emission may be possible at temperatures where sufficient vapor density can be obtained.

• Research Organization: Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6658713
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 74:2; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM CHLORIDES
ALUMINIUM COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DATA
EMISSION
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
EXPERIMENTAL DATA
FLUIDS
FLUORESCENCE
GAS LASERS
GASES
HALIDES
HALOGEN COMPOUNDS
HIGH TEMPERATURE
INFORMATION
LASERS
LUMINESCENCE
NUMERICAL DATA
RARE EARTH COMPOUNDS
SPECTRA
STIMULATED EMISSION
TERBIUM CHLORIDES
TERBIUM COMPOUNDS
VAPORS