DOI: 10.1063/1.1712401. Vibrational Quenching of Glory Undulations in Scattering of Na from Polyatomic Gases

Vibrational Quenching of Glory Undulations in Scattering of Na from Polyatomic Gases

10.1063/1.1712401

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

The velocity dependence of total cross sections has been measured for the molecular-beam scattering of Na atoms from Ar, Kr, and eight polyatomic gases. The glory undulations observed for Ar and Kr agree well with other recent work. The molecular systems studied fall into three categories with regard to the appearance of undulations: (a) strong: CF4, SiF4, C2F6, and BF3; (b) weak: GeH4 and C4F8; and (c) very weak or absent: C(CH3)4 and CF3Cl. It seems plausible that damping of the undulations occurs when the polarizability of the molecule changes appreciably during a relatively slow vibration. A semiempirical quench parameter q is defined for molecules of the form ABn to give a relative measure of the effectiveness of spherically symmetric vibrations in damping the glory undulations. q is proportional to (1) an estimate of the derivative of the polarizability with respect to the symmetric stretching coordinate; (2) a semiclassical measure of the vibration amplitude; and (3) the inverse of the symmetric stretching frequency. The values of q for molecules studied here are in qualitative agreement with our experimental results.

Bibliography

Kramer, H. L., & LeBreton, P. R. (1967). Vibrational Quenching of Glory Undulations in Scattering of Na from Polyatomic Gases. The Journal of Chemical Physics, 47(9), 3367â3370.

Authors 2

H. L. Kramer (first)
P. R. LeBreton (additional)

References 21 Referenced 23

10.1016/S0065-2199(08)60283-3 / Advan. At. Mol. Phys. (1965)
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{'key': '2024020903025067500_r4'}
10.1063/1.1727376 / J. Chem. Phys. (1966)
10.1007/BF01384175 / Z. Physik (1962)
10.1007/BF01326439 / Z. Physik (1966)
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{'key': '2024020903025067500_r10'}
{'key': '2024020903025067500_r11'}
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{'key': '2024020903025067500_r13'}
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{'key': '2024020903025067500_r16'}
{'key': '2024020903025067500_r17'}
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Dates

Type	When
Created	20 years, 7 months ago (Jan. 9, 2005, 4:57 a.m.)
Deposited	1 year, 6 months ago (Feb. 8, 2024, 10:08 p.m.)
Indexed	1 year, 6 months ago (Feb. 10, 2024, 3:55 a.m.)
Issued	57 years, 9 months ago (Nov. 1, 1967)
Published	57 years, 9 months ago (Nov. 1, 1967)
Published Print	57 years, 9 months ago (Nov. 1, 1967)

Funders 0

None

BibTeX

@article{Kramer_1967, title={Vibrational Quenching of Glory Undulations in Scattering of Na from Polyatomic Gases}, volume={47}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1712401}, DOI={10.1063/1.1712401}, number={9}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kramer, H. L. and LeBreton, P. R.}, year={1967}, month=nov, pages={3367–3370} }

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