Cavity Ringdown Spectroscopy

Figure Bl.2.9. Schematic representation of the metliod used in cavity ringdown laser absorption spectroscopy. From [33], used with pemhssion.

Scherer J J, Paul J B, O Keefe A and Saykally R J 1997 Cavity ringdown laser absorption spectroscopy history, development, and application to pulsed molecular beams Chem. Rev. 97 25-51... 

Scherer J J ef a/1995 Infrared cavity ringdown laser-absorption spectroscopy (IR-CRLAS) Chem. Phys. Lett. 245 273-80... 

Paul J B, Collier C P, Saykally R J, Scherer J J and O Keefe A 1997 Direct measurement of water cluster concentrations by infrared cavity ringdown laser absorption spectroscopy J. Phys. Chem. A 101 5211-14... 

Provencal R A ef a/1999 Infrared cavity ringdown spectroscopy of methanol clusters single donor hydrogen bonding J. Chem. Phys. 110 4258-67... 

A promising technique is cavity ringdown laser absorption spectroscopy (307), in which the rate of decay of laser pulses injected into an optical cavity containing the sample is measured. Absorption sensitivities of 5 x 10 have been measured on a ]ls time scale. AppHcations from the uv to the ir... 

Mcllroy, A. and Jeffries, J.B., Cavity ringdown spectroscopy for concentration measurements, in Applied Combustion Diagnostics, Kohse-Hoinghaus, K. and Jeffries, J.B. (Eds.), Taylor Francis, New York, 2002, Chapter 4. 

Scherer, J.J. et al.. Cavity ringdown laser absorption spectroscopy History, development and applications to pulsed molecular beams, Chem. Rev., 97, 25, 1997. 

Xie, J. et al.. Near-infrared cavity ringdown spectroscopy of water vapor in an atmospheric flame, Chem. Phys. Lett., 284, 387,1998. 

Dreyer, C.B., Spuler, S.M., and Linne, M., Calibration of laser induced fluorescence of the OH radical by cavity ringdown spectroscopy in premixed atmospheric pressure flames. Combust. Sci. Tech., 171,163, 2001. 

Ramos, C. Dagdigian, P. J., Detection of vapors of explosives and explosive related com pounds by ultraviolet cavity ringdown spectroscopy, Appl. Opt. 2007, 46, 620 627... 

R. A. Provencal, J. B. Paul, K. Roth, C. Chapo, R. N. Casaes, R. J. Saykally, G. S. Tschumper, and H. F. Schaefer III, Infrared cavity ringdown spectroscopy of methanol clusters Single donor hydrogen bonding. J. Chem. Phys. 110, 4258 4267 (1999). 

CRLAS See cavity ringdown laser absorption spectroscopy. 

Paul, J. B., and R. J. Saykally, Cavity Ringdown Laser Absorption Spectroscopy, Anal. Chem., 69, A287-A292 (1997). 

Recent advances in spectroscopic methods have enabled the water pentamer to be studied experimentally. Infrared cavity ringdown spectroscopy has been used to examine the intramolecular absorption features of the gas-phase water pentamer, which match the spectral features of the pentamer rings in liquid water and amorphous ice (Paul et al., 1999 Burnham et al., 2002). Vibration Rotation Tunnelling (VRT) spectroscopy has been used to provide a more direct probe of the water pentamer intermolecular vibrations and fine structure in liquid water (Liu et al., 1997 Harker et al., 2005). The water pentamer was found to average out... 

Fig. 4. A description of a cavity ringdown spectroscopy (CRDS) apparatus.

The vibronic spectra of Do — Di — D2 electronic states recoded by da Silva Filho et al. [45] revealed resolved vibrational structures of the Do and D2 electronic states and a broad and structureless band for the Di state. A slow ( 3-20 ps) and fast k, 200 fs) relaxation components are estimated for the Dq D2 transition in a (femto)picosecond transient grating spectroscopy measurements [16]. The fast component is attributed to the Do D2 transition and a nonradiative relaxation time of 212 fs is also estimated from the cavity ringdown (CRD) spectroscopy data [42]. Electronic structure results of Hall et al. [107] suggest that the nonradiative Do D2 relaxation occurs via two consecutive sloped type CIs [66,108]. We developed a global model PESs for the Do — Di— D2 electronic states and devised a vibronic coupling model to study the nuclear dynamics underlying the complex vibronic spectrum and ultrafast excited state decay of N +[20]. 

Wen-Bin, Y., Ultra Sensitive Trace Gas Detection using Cavity Ringdown Spectroscopy, IFPAC January 21—24, 2001, Amelia Island, FL, USA www.Meeco.-com www.tigeroptics.com ... 

Crosson, E et al, Cavity Ringdown Spectroscopy Developing a Simjde and Rugged Trace Isotope Analyzer, IFPAC January 21-24, 2001 Amelia Island, FL, USA Informed Diagnostics Inc, Sunnyvale, CA... 

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