Semiclassical model for the distribution of final polar angles and m′ states in rotationally inelastic collisions

T. J. Price; A. C. Towne; D. Talbi; A. P. Hickman

doi:10.1016/j.cplett.2015.12.037

Semiclassical model for the distribution of final polar angles and m′ states in rotationally inelastic collisions

T. J. Price, A. C. Towne, D. Talbi, A. P. Hickman

Division of Humanities, Arts and Social Sciences (Berks)

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Using the venerable vector model, we develop an expression for the change in the polar angle of the angular momentum of a rotator caused by collisions in a cell-type experiment. For an initial j precessing with polar angle θ, and a given distribution of 'tipping angles', we derive the distribution of final polar angles θ′. Final m′ levels are also determined. The results agree well with exact quantum calculations for thermal collisions of He or Ar with NaK. We also identify a special case where the distribution of θ′ has a simple Lorentzian form.

Original language	English (US)
Pages (from-to)	180-186
Number of pages	7
Journal	Chemical Physics Letters
Volume	645
DOIs	https://doi.org/10.1016/j.cplett.2015.12.037
State	Published - Feb 2016

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/j.cplett.2015.12.037

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title = "Semiclassical model for the distribution of final polar angles and m′ states in rotationally inelastic collisions",

abstract = "Using the venerable vector model, we develop an expression for the change in the polar angle of the angular momentum of a rotator caused by collisions in a cell-type experiment. For an initial j precessing with polar angle θ, and a given distribution of 'tipping angles', we derive the distribution of final polar angles θ′. Final m′ levels are also determined. The results agree well with exact quantum calculations for thermal collisions of He or Ar with NaK. We also identify a special case where the distribution of θ′ has a simple Lorentzian form.",

author = "Price, {T. J.} and Towne, {A. C.} and D. Talbi and Hickman, {A. P.}",

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language = "English (US)",

volume = "645",

pages = "180--186",

journal = "Chemical Physics Letters",

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T1 - Semiclassical model for the distribution of final polar angles and m′ states in rotationally inelastic collisions

AU - Price, T. J.

AU - Towne, A. C.

AU - Talbi, D.

AU - Hickman, A. P.

PY - 2016/2

Y1 - 2016/2

N2 - Using the venerable vector model, we develop an expression for the change in the polar angle of the angular momentum of a rotator caused by collisions in a cell-type experiment. For an initial j precessing with polar angle θ, and a given distribution of 'tipping angles', we derive the distribution of final polar angles θ′. Final m′ levels are also determined. The results agree well with exact quantum calculations for thermal collisions of He or Ar with NaK. We also identify a special case where the distribution of θ′ has a simple Lorentzian form.

AB - Using the venerable vector model, we develop an expression for the change in the polar angle of the angular momentum of a rotator caused by collisions in a cell-type experiment. For an initial j precessing with polar angle θ, and a given distribution of 'tipping angles', we derive the distribution of final polar angles θ′. Final m′ levels are also determined. The results agree well with exact quantum calculations for thermal collisions of He or Ar with NaK. We also identify a special case where the distribution of θ′ has a simple Lorentzian form.

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SN - 0009-2614

VL - 645

SP - 180

EP - 186

JO - Chemical Physics Letters

JF - Chemical Physics Letters

ER -

Semiclassical model for the distribution of final polar angles and m′ states in rotationally inelastic collisions

Abstract

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