Flash‐Absorption Spectroscopy of Free Radicals in Shock Waves

1960 ◽  
Vol 33 (1) ◽  
pp. 311-312 ◽  
Author(s):  
R. M. Ikeda
Keyword(s):  
Free Radicals ◽  
Shock Waves ◽  
Absorption Spectroscopy ◽  
Flash Absorption Spectroscopy

EXPERIMENTAL STUDY OF REACTION OF ETHANOL WITH OXYGEN BEHIND SHOCK WAVES USING ATOMIC RESONANCE ABSORPTION SPECTROSCOPY METHOD

2020 ◽  
Author(s):  
N. S. Bystrov ◽  
◽  
A. V. Emelianov ◽  
A. V. Eremin ◽  
P. I. Yatsenko ◽  
...  
Keyword(s):  
Experimental Study ◽  
Shock Waves ◽  
Absorption Spectroscopy ◽  
Vacuum Ultraviolet ◽  
Resonance Absorption ◽  
Atomic Resonance ◽  
Quantitative Measurements ◽  
Series Of Experiments ◽  
Kinetics Of Reaction ◽  
Oxygen Atoms

The kinetics of reaction of C2H5OH with N2O behind shock waves is studied. The quantitative measurements of the time profiles of concentration of O atoms were carried out by the method of atomic resonance absorption spectroscopy (ARAS) using resonance vacuum-ultraviolet line of O-atom at 130.5 nm. For the calibration of absorption intensity of oxygen atoms depending on its concentration, the special series of experiments in the mixture containing different amounts of N2O in Ar was carried out at T = 2100 ± 50 K when molecule of N2O is completely dissociated. An experimental study of the appearance and consumption of oxygen atoms during the reaction of ethanol with oxygen in mixture 10 ppm N2O + (10 ... 0.1) ppm C2H5OH + Ar at temperatures of 16002300 K and pressures of 200-300 kPa have been carried out. A kinetic analysis of obtained data was performed using the Chemkin package.

Ultrafast studies of shock waves using interferometric methods and transient infrared absorption spectroscopy

2004 ◽  
Vol 453-454 ◽  
pp. 542-549 ◽  
Author(s):  
D.J. Funk ◽  
D.S. Moore ◽  
S.D. McGrane ◽  
K.T. Gahagan ◽  
J.H. Reho ◽  
...  
Keyword(s):  
Shock Waves ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Infrared Absorption Spectroscopy

scholarly journals Enrichment of nitrogen-15 by the direct laser photolysis of ammonia-d3 in the transition

1978 ◽  
Vol 56 (23) ◽  
pp. 2981-2984 ◽  
Author(s):  
P. A. Hackett ◽  
R. A. Back ◽  
S. Koda
Keyword(s):  
Free Radicals ◽  
Enrichment Factor ◽  
Absorption Spectroscopy ◽  
Narrow Band ◽  
Pulsed Dye Laser ◽  
Quantum Yields ◽  
Hydrogen Formation ◽  
Direct Laser ◽  
Secondary Reactions ◽  
Isotopic Selectivity

Ammonia-d3 of differing 14N/15N ratios has been photolysed in the [Formula: see text] transition using a narrow-band-width, frequency-doubled, pulsed dye laser. At specific excitation wavelengths, chosen by absorption spectroscopy, the product nitrogen is enriched in 15N, a maximum enrichment factor of 4.8 being attained. The initial isotopic selectivity of excitation is largely retained in the nitrogen product, even though the primary photodissociation forms free radicals and N2 is formed only after a sequence of secondary reactions. Quantum yields of nitrogen and hydrogen formation have been measured at very low conversions as a function of the time of irradiation. The initial yield of nitrogen appears to be zero and that of hydrogen 0.25.

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