Vibrational Relaxation of the Bending Mode of Shock‐Heated CO2 by Laser‐Absorption Measurements

1972 ◽  
Vol 57 (2) ◽  
pp. 632-638 ◽  
Author(s):  
D. J. Eckstrom ◽  
D. Bershader
Keyword(s):  
Vibrational Relaxation ◽  
Laser Absorption ◽  
Bending Mode ◽  
Absorption Measurements

High-Bandwidth Laser-Absorption Measurements of Temperature, Pressure, CO, and H2O in the Annulus of a Rotating Detonation Rocket Engine

2021 ◽  
Author(s):  
Garrett C. Mathews ◽  
Matthew Blaisdell ◽  
Aaron I. Lemcherfi ◽  
Carson D. Slabaugh ◽  
Christopher S. Goldenstein
Keyword(s):  
Rocket Engine ◽  
Laser Absorption ◽  
High Bandwidth ◽  
Rotating Detonation ◽  
Absorption Measurements

Singlet Methylene Removal Rate Constants from the (0,1,0) Vibrational Level: Enhancement via Complex-Mediated Vibrational Relaxation

2001 ◽  
Vol 215 (6) ◽  
Author(s):  
M.A. Buntine ◽  
G.J. Gutsche ◽  
W.S. Staker ◽  
M.W. Heaven ◽  
K.D. King ◽  
...  
Keyword(s):  
Vibrational Level ◽  
Rate Constants ◽  
Vibrational Relaxation ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Removal Rate ◽  
Laser Flash ◽  
Laser Absorption ◽  
Photolysis Laser ◽  
Singlet Methylene

The technique of laser flash photolysis/laser absorption has been used to obtain absolute removal rate constants for singlet methylene,

Diode-laser absorption measurements of CO 2 , H 2 O, N 2 O, and NH 3 near 2.0 μm

1998 ◽  
Vol 67 (3) ◽  
pp. 283-288 ◽  
Author(s):  
R.M. Mihalcea ◽  
M.E. Webber ◽  
D.S. Baer ◽  
R.K. Hanson ◽  
G.S. Feller ◽  
...  
Keyword(s):  
Diode Laser ◽  
Laser Absorption ◽  
Diode Laser Absorption ◽  
Absorption Measurements

Shock tube/laser absorption measurements of the isomerization rates of allene and propyne

2022 ◽  
Vol 238 ◽  
pp. 111962
Author(s):  
S.E. Johnson ◽  
Y. Ding ◽  
D.F. Davidson ◽  
R.K. Hanson
Keyword(s):  
Shock Tube ◽  
Laser Absorption ◽  
Absorption Measurements

Diode-laser absorption measurements of CO_2 near 20 μm at elevated temperatures

1998 ◽  
Vol 37 (36) ◽  
pp. 8341 ◽  
Author(s):  
Radu M. Mihalcea ◽  
Douglas S. Baer ◽  
Ronald K. Hanson
Keyword(s):  
Diode Laser ◽  
Elevated Temperatures ◽  
Laser Absorption ◽  
Diode Laser Absorption ◽  
Absorption Measurements

Broadband, Mid-Infrared Laser-Absorption Measurements of Temperature, CH4, and C3H8 in Flames

2021 ◽  
Author(s):  
Ziqiao Chang ◽  
Ryan J. Tancin ◽  
Vishnu Radhakrishna ◽  
Robert P. Lucht ◽  
Christopher S. Goldenstein
Keyword(s):  
Infrared Laser ◽  
Mid Infrared ◽  
Laser Absorption ◽  
Absorption Measurements

Infrared laser spectroscopy of cations

1988 ◽  
Vol 324 (1578) ◽  
pp. 121-130 ◽  
Keyword(s):  
Modulation Frequency ◽  
Neutral Species ◽  
Velocity Modulation ◽  
Laser Absorption ◽  
Infrared Laser Spectroscopy ◽  
Bending Mode ◽  
Vibrational Levels ◽  
Hot Band ◽  
Diode Laser Absorption ◽  
Potential Maximum

The high-resolution infrared diode laser absorption spectra of several cations have been recorded and analysed. Most of the spectra were detected with an AC discharge and the velocity-modulation technique, with frequencies up to 60 kHz. In addition to ions, this method can also detect transient neutral species by recording at twice the modulation frequency (concentration modulation). As an example, spectra of an infrared electronic transition in H 2 are described briefly. The diatomic cationic species discussed are CO+ (X 2 E + ) and SH + (X 3 E - ), which are compared with the isoelectronic neutral free radicals CN and PH respectively, also in their ground states. Polyatomic cations that have been studied include HCO+ and H 3 0 + . The bending mode of HCO+ (2) shows a distinctive Q-branch with many resolved components at Doppler-limited resolution and also some hot-band lines. The HCO + spectrum can be combined with microwave measurements in the ground vibrational level to yield predictions for (2 1 ) rotational transitions for astrophysical searches. The most recent spectra of the v 2 ‘umbrella’ mode of H 3 O + , the 2+ <- I - band, provide spectroscopic data on vibrational levels approximately 1000 cm -1 above the inversion potential maximum.

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