Collisional De-excitation of the Thallium 62 P3/2 State
- 1 November 1970
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 53 (9), 3474-3479
- https://doi.org/10.1063/1.1674520
Abstract
The collisional de‐excitation cross sections of the metastable state of thallium have been measured for the following atoms and molecules: He, Ne, Ar, TlI, TlBr, TlCl, O2, NO, H2, CO, CH4, C2H4, C2H6, C3H6, C3H8, CO2, and N2. Metastable thallium was produced in a quartz cell by photodissociating thallium halide vapor with a pulse of ultraviolet radiation. The density of the metastable thallium decays due to collisions with the gas added to the cell. The decay is exponential with a time constant governed by the density of the added gas. The lifetime of the metastable state was measured by monitoring the absorption of the thallium 5350 Å line from a beam of resonance radiation passing through the cell. Since the density of the added gas is known, the cross section can be computed from the measured lifetime. Our results are accurate to about 15%.
Keywords
This publication has 14 references indexed in Scilit:
- De-excitation of Electronically Excited Sodium by NitrogenThe Journal of Chemical Physics, 1969
- The lifetime and effective quenching cross section of the 62PJournal of Quantitative Spectroscopy and Radiative Transfer, 1969
- Ultraviolet Absorption Cross Sections for the Thallium Halide and Silver Halide VaporsThe Journal of Chemical Physics, 1969
- Detection of Vibrationally Excitedby Superelastic Electron ImpactPhysical Review Letters, 1968
- The determination of cross sections for quenching of resonance radiation of metal atoms III. Results for thalliumProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1968
- Energy transfer in collisions of an excited sodium atom with a nitrogen moleculeChemical Physics Letters, 1967
- Infrared-Emission Studies of Electronic-to-Vibrational Energy Transfer. III. Hg* + NOThe Journal of Chemical Physics, 1967
- Infrared-Emission Studies of Electronic-to-Vibrational Energy Transfer. II. Hg*+COThe Journal of Chemical Physics, 1967
- Measurement of Energy Transfer in Molecular CollisionsApplied Optics, 1965
- Photodissociation of Thallium Bromide and Cesium BromideApplied Optics, 1965