Molecular beam maser measurements of relaxation cross sections in NH3

S. G. Kukolich; J. H.S. Wang; D. E. Oates

doi:10.1016/0009-2614(73)80489-0

Molecular beam maser measurements of relaxation cross sections in NH₃

S. G. Kukolich, J. H.S. Wang, D. E. Oates

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Abstract

Direct measurements of scattering cross sections for NH₃ in well-defined quantum states are made using a molecular beam maser spectrometer. Cross sections are compared for a pure inversion state with those for a coherent superposition state for scattering gases He, Ar, N₂, N₂O, NH₃, CH₃H and CH₃CN. The cross sections are significantly larger for scattering of the pure inversion state by NH₃, CF₃H and CH₃CN than for scattering of the superposition state. The scattering is the same for both states on non-polar gases. These cross sections are related to relaxation parameters describing transitions between rotation and inversion states.

Original language	English (US)
Pages (from-to)	519-524
Number of pages	6
Journal	Chemical Physics Letters
Volume	20
Issue number	6
DOIs	https://doi.org/10.1016/0009-2614(73)80489-0
State	Published - Jul 15 1973
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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title = "Molecular beam maser measurements of relaxation cross sections in NH3",

abstract = "Direct measurements of scattering cross sections for NH3 in well-defined quantum states are made using a molecular beam maser spectrometer. Cross sections are compared for a pure inversion state with those for a coherent superposition state for scattering gases He, Ar, N2, N2O, NH3, CH3H and CH3CN. The cross sections are significantly larger for scattering of the pure inversion state by NH3, CF3H and CH3CN than for scattering of the superposition state. The scattering is the same for both states on non-polar gases. These cross sections are related to relaxation parameters describing transitions between rotation and inversion states.",

author = "Kukolich, {S. G.} and Wang, {J. H.S.} and Oates, {D. E.}",

year = "1973",

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doi = "10.1016/0009-2614(73)80489-0",

language = "English (US)",

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T1 - Molecular beam maser measurements of relaxation cross sections in NH3

AU - Kukolich, S. G.

AU - Wang, J. H.S.

AU - Oates, D. E.

PY - 1973/7/15

Y1 - 1973/7/15

N2 - Direct measurements of scattering cross sections for NH3 in well-defined quantum states are made using a molecular beam maser spectrometer. Cross sections are compared for a pure inversion state with those for a coherent superposition state for scattering gases He, Ar, N2, N2O, NH3, CH3H and CH3CN. The cross sections are significantly larger for scattering of the pure inversion state by NH3, CF3H and CH3CN than for scattering of the superposition state. The scattering is the same for both states on non-polar gases. These cross sections are related to relaxation parameters describing transitions between rotation and inversion states.

AB - Direct measurements of scattering cross sections for NH3 in well-defined quantum states are made using a molecular beam maser spectrometer. Cross sections are compared for a pure inversion state with those for a coherent superposition state for scattering gases He, Ar, N2, N2O, NH3, CH3H and CH3CN. The cross sections are significantly larger for scattering of the pure inversion state by NH3, CF3H and CH3CN than for scattering of the superposition state. The scattering is the same for both states on non-polar gases. These cross sections are related to relaxation parameters describing transitions between rotation and inversion states.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 6

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Molecular beam maser measurements of relaxation cross sections in NH₃

Abstract

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