DOI: 10.1063/1.1671773. Vibrational Energy Distribution through Chemical Laser Studies. I. Fluorine Atoms plus Hydrogen or Methane

Vibrational Energy Distribution through Chemical Laser Studies. I. Fluorine Atoms plus Hydrogen or Methane

10.1063/1.1671773

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

A new method is described for determining the energy distribution among the product vibrational energy levels in an exothermic reaction. By careful control of the rotational temperature in the UF6–H2(D2) and UF6–CH4(CD4) chemical laser systems, one can obtain conditions for which two hydrogen fluoride vibration–rotation transitions initiate simultaneously and with the same gain. From the relationship between relative gain, rotational temperature, and the vibrational populations, an accurate value can be determined for the ratio of the populations Nυ / Nυ−1 of the two states involved in the first transition to reach laser threshold. This ratio equals kυ/kυ−1 after vibrational deactivation has been taken into account. This technique has yielded the following rate-constant ratios:F + H2→limυHFυ† + H, k2 / k1∼5.5 F + D2→limυDFυ† + D, k3 / k2∼1.6. The significant observations are that the rate-constant ratios are all above unity, the hydrogen and methane values are very close to each other, and the DF ratios are much closer to unity than their HF counterparts.

Bibliography

Parker, J. H., & Pimentel, G. C. (1969). Vibrational Energy Distribution through Chemical Laser Studies. I. Fluorine Atoms plus Hydrogen or Methane. The Journal of Chemical Physics, 51(1), 91â96.

Authors 2

John H. Parker (first)
George C. Pimentel (additional)

References 11 Referenced 227

{'key': '2024020905145688200_r1', 'first-page': '208', 'volume': '24A', 'year': '1967', 'journal-title': 'Phys. Letters'} / Phys. Letters (1967)
10.1039/DF9674400183 / Discussions Faraday Soc. (1967)
10.1063/1.1697087 / J. Chem. Phys. (1965)
10.1063/1.1712068 / J. Chem. Phys. (1967)
{'key': '2024020905145688200_r2b', 'first-page': '319', 'volume': '10', 'year': '1966', 'journal-title': 'Advan. Chem. Phys.'} / Advan. Chem. Phys. (1966)
10.1063/1.1669868 / J. Chem. Phys. (1968)
10.1063/1.1668205 / J. Chem. Phys. (1968)
10.1063/1.1711963 / J. Chem. Phys. (1967)
10.1103/PhysRev.136.A1187 / Phys. Rev. (1964)
10.1021/ja01479a005 / J. Am. Chem. Soc. (1961)
{'key': '2024020905145688200_r8'}

Dates

Type	When
Created	21 years, 6 months ago (Feb. 6, 2004, 2:22 p.m.)
Deposited	1 year, 6 months ago (Feb. 9, 2024, 12:34 a.m.)
Indexed	1 year, 2 months ago (May 30, 2024, 7:10 a.m.)
Issued	56 years, 1 month ago (July 1, 1969)
Published	56 years, 1 month ago (July 1, 1969)
Published Print	56 years, 1 month ago (July 1, 1969)

Funders 0

None

BibTeX

@article{Parker_1969, title={Vibrational Energy Distribution through Chemical Laser Studies. I. Fluorine Atoms plus Hydrogen or Methane}, volume={51}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1671773}, DOI={10.1063/1.1671773}, number={1}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Parker, John H. and Pimentel, George C.}, year={1969}, month=jul, pages={91–96} }

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