DOI: 10.1063/1.1672660. Cl+HBr Pulsed Chemical Laser: A Theoretical and Experimental Study

Cl+HBr Pulsed Chemical Laser: A Theoretical and Experimental Study

10.1063/1.1672660

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The most powerful and efficient pulsed chemical lasers produced to date have resulted from the simple exothermic reactions between halogen atoms and hydrogen halides. These reactions have been initiated by flash photolysis. One such reaction is Cl+HBr→HCl+Br, − ΔH = 15.5 kcal/mole. A kinetic model has been developed for this laser system which calculates the intensity profile of the laser pulse as a function of time. The input data for the model include estimates of the reaction rate into the zeroth and first vibrational level of HCl and cross sections for collisional deactivation by the different chemical species in the laser medium. The rate of reaction into the second vibrational level of HCl is assumed to be zero. Any small finite rate into the second level would have a negligible effect on the calculated performance of the laser which operates only on the V(1 → 0) fundamental transition of HCl. The theoretical model also requires as input data the photolysis flash intensity profile, the cavity geometry, and the losses. A discussion of the model is given, and a comparison is made between experiment and theory. The model is able to predict quantitative variations of the laser pulse characteristics as a function of flash intensity, cavity losses, and reagent partial pressures. The quantitative calculations are in reasonable agreement with experiment. It is concluded that (a) the most important single contribution to deactivation in the system is HCl (V = 1) + HBr (V = 0) → HCl (V = 0) + HBr (V = 1), and (b) the rate of reaction to produce HCl (V = 1) is at least as large as that to produce HCl (V = 0).

Bibliography

Airey, J. R. (1970). Cl+HBr Pulsed Chemical Laser: A Theoretical and Experimental Study. The Journal of Chemical Physics, 52(1), 156â167.

Authors 1

J. Richard Airey (first)

References 16 Referenced 71

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{'key': '2024020905504347400_r2', 'first-page': '352', 'volume': '14', 'year': '1965', 'journal-title': 'Phys. Rev. Letters'} / Phys. Rev. Letters (1965)
10.1063/1.1656983 / J. Appl. Phys. (1968)
10.1063/1.1671286 / J. Chem. Phys. (1969)
10.1109/JQE.1967.1074484 / IEEE J. Quantum Electron. (1967)
10.1063/1.1754926 / Appl. Phys. Letters (1967)
10.1109/JQE.1968.1075022 / IEEE J. Quantum Electron. (1968)
10.1063/1.1670235 / J. Chem. Phys. (1968)
{'key': '2024020905504347400_r6'}
10.1039/DF9674400183 / Discussions Faraday Soc. (1967)
10.1063/1.1670019 / J. Chem. Phys. (1968)
{'key': '2024020905504347400_r8'}
{'key': '2024020905504347400_r9'}
10.1016/0022-2852(58)90088-2 / J. Mol. Spectry. (1958)
10.1016/0009-2614(63)80025-1 / Chem. Phys. Letters (1968)
{'key': '2024020905504347400_r12'}

Dates

Type	When
Created	21 years, 6 months ago (Feb. 6, 2004, 2:23 p.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 1:16 a.m.)
Indexed	1 year, 6 months ago (Feb. 9, 2024, 10:58 p.m.)
Issued	55 years, 8 months ago (Jan. 1, 1970)
Published	55 years, 8 months ago (Jan. 1, 1970)
Published Print	55 years, 8 months ago (Jan. 1, 1970)

Funders 0

None

BibTeX

@article{Airey_1970, title={Cl+HBr Pulsed Chemical Laser: A Theoretical and Experimental Study}, volume={52}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1672660}, DOI={10.1063/1.1672660}, number={1}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Airey, J. Richard}, year={1970}, month=jan, pages={156–167} }

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