| Autor: |
Scappini, Flavio, Di Lonardo, Gianfranco, Mäder, Heinrich |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 7/1/1990, Vol. 93 Issue 1, p105, 6p |
| Abstrakt: |
The highly sensitive method of radio-frequency–infrared double resonance spectroscopy inside the cavity of a CO2 laser has been applied to the study of collision-induced transitions of CH379Br and CH381Br in the four level scheme. Various types of radio-frequency transitions corresponding to A1–A2 and pure quadropole resonances were observed as a result of collision population transfer between different rotational levels. Thus, collision-induced dips have been measured in the pure gas and in mixtures with polar carbonyl sulfide (OCS) and nonpolar (He, Ar) foreign gases. Clamping experiments were also done, using a second radiation in a six level triple resonance configuration to investigate collision selection rules. The intensity ratios of the collision-induced dips to the corresponding three level double resonance signals were measured for a number of transitions in the ground and in excited vibrational states. Collision selection rules in the pure gas and in mixtures with polar and nonpolar foreign gases are discussed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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