Infrared double resonance of SiH4with a tunable diode laser: Two‐photon absorptions and rotational relaxation times

1988 ◽  
Vol 88 (11) ◽  
pp. 6742-6746 ◽  
Author(s):  
G. Millot ◽  
J. Hetzler ◽  
B. Foy ◽  
J. I. Steinfeld
Keyword(s):  
Diode Laser ◽  
Double Resonance ◽  
Relaxation Times ◽  
Tunable Diode Laser ◽  
Rotational Relaxation ◽  
Two Photon ◽  
Rotational Relaxation Times

Investigation of Rotational Relaxation by Double Resonance and Stark Switch Techniques

1980 ◽  
Vol 35 (8) ◽  
pp. 832-840
Author(s):  
W. Schrepp ◽  
H. Dreizler ◽  
A. Guarnieri
Keyword(s):  
Double Resonance ◽  
Relaxation Times ◽  
Experimental Methods ◽  
Rotational Relaxation ◽  
Triple Resonance ◽  
Static Electric Field ◽  
First Order ◽  
Four Levels ◽  
Relative Change

Abstract For the four rotational levels JK₋K₊ = 101, 110,212 and 221 of ethylene oxide all possible four level double resonance experiments for dipole allowed transitions have been performed to investigate collisional effects and to determine the relative change of signal intensity, η = ⊿I/I, due to high power pump radiation. The T1 and T2-relaxation times have been measured for all dipole allowed transitions within these four levels. A combination of the data obtained from both experimental methods allows the determination of rate and bath constants taking into account only first order dipolar transitions. No further restrictions have been used. This approximation is supported by a triple resonance experiment. In addition to the pure gas investigation in the absence of external fields, rotational relaxation has been studied in the presence of a static electric field and in a mixture with hydrogen.

ChemInform Abstract: INFRARED DOUBLE RESONANCE OF FLUOROFORM-D WITH A TUNABLE DIODE LASER

1985 ◽  
Vol 16 (14) ◽  
Author(s):  
D. HARRADINE ◽  
B. FOY ◽  
L. LAUX ◽  
M. DUBS ◽  
J. I. STEINFELD
Keyword(s):  
Diode Laser ◽  
Double Resonance ◽  
Tunable Diode Laser

Viskositäts-und Lösungsmittelabhängigkeit der Fluoreszenzanisotropie und der Lebensdauer von p-Terphenyl

1980 ◽  
Vol 35 (11) ◽  
pp. 1197-1200
Author(s):  
A. Kawski ◽  
Z. Kojro ◽  
M. Alicka
Keyword(s):  
Linear Dependence ◽  
Relaxation Times ◽  
New Method ◽  
Rotational Relaxation ◽  
Rotational Relaxation Times

Abstract The fluorescence anisotropics (FA) r and the lifetimes of p-terphenyl in different solvents have been measured, the effective volumes and the rotational relaxation times being determined. The deviation from the linear dependence of 1/r on 1/η (η-viscosity of the solvent) may explained by the length of the p-terphenyl molecule. The FA measurements were carried out by a method with an Arago compensator, a new method of the automatization of measurements being employed.

Infrared‐microwave double resonance spectroscopy of the ν3 band of 11BF3 using a tunable diode laser

1985 ◽  
Vol 83 (4) ◽  
pp. 1444-1448 ◽  
Author(s):  
Satoshi Yamamoto ◽  
Kozo Kuchitsu ◽  
Taisuke Nakanaga ◽  
Harutoshi Takeo ◽  
Chi Matsumura ◽  
...  
Keyword(s):  
Diode Laser ◽  
Double Resonance ◽  
Tunable Diode Laser ◽  
Resonance Spectroscopy ◽  
Double Resonance Spectroscopy

Investigation of T1 and T2 Relaxation for Ethylene Oxide Rotational Transitions

1979 ◽  
Vol 34 (10) ◽  
pp. 1181-1184
Author(s):  
H. Mäder ◽  
W. Lalowski ◽  
R. Schwarz
Keyword(s):  
Ethylene Oxide ◽  
Relaxation Times ◽  
Rotational Relaxation ◽  
T2 Relaxation ◽  
Rotational Transitions ◽  
T1 And T2 ◽  
Microwave Techniques ◽  
Rotational Relaxation Times

Abstract The dependence of rotational relaxation times T1 and T2 on pressure and temperature has been determined for various rotational transitions of ethylene oxide by using transient microwave techniques.

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