Angular resolution and isotope studies for inversion relaxation in NH 3

J. R. Williams; S. G. Kukolich

doi:10.1063/1.433674

Angular resolution and isotope studies for inversion relaxation in NH ₃

J. R. Williams, S. G. Kukolich

Chemistry and Biochemistry

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6 Scopus citations

Abstract

Inversion relaxation cross sections for the J = 3, K = 2 upper state of NH₃ were measured using a beam maser spectrometer. Scattering gases were NH₃, ND₃, HCl, and H₂O. For NH ₃-NH₃ scattering the angular resolution was varied from 1.5° to 0.2° with little effect on cross sections. Cross sections for NH₃ and ND₃ as scattering gases were equal within experimental error. The result that beam maser cross sections are relatively independent of angular resolution is discussed. Calculated angular resolution corrections are compared with values of beam attenuation cross sections and total cross sections obtained from the present data. Comparison is made between our pure state (σ_I) and superposition state (σ_II) cross sections and recent T₁ and T₂ gas-cell data.

Original language	English (US)
Pages (from-to)	251-255
Number of pages	5
Journal	The Journal of chemical physics
Volume	66
Issue number	1
DOIs	https://doi.org/10.1063/1.433674
State	Published - 1976

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General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.433674

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title = "Angular resolution and isotope studies for inversion relaxation in NH 3",

abstract = "Inversion relaxation cross sections for the J = 3, K = 2 upper state of NH3 were measured using a beam maser spectrometer. Scattering gases were NH3, ND3, HCl, and H2O. For NH 3-NH3 scattering the angular resolution was varied from 1.5° to 0.2° with little effect on cross sections. Cross sections for NH3 and ND3 as scattering gases were equal within experimental error. The result that beam maser cross sections are relatively independent of angular resolution is discussed. Calculated angular resolution corrections are compared with values of beam attenuation cross sections and total cross sections obtained from the present data. Comparison is made between our pure state (σI) and superposition state (σII) cross sections and recent T1 and T2 gas-cell data.",

author = "Williams, {J. R.} and Kukolich, {S. G.}",

year = "1976",

doi = "10.1063/1.433674",

language = "English (US)",

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journal = "The Journal of chemical physics",

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T1 - Angular resolution and isotope studies for inversion relaxation in NH 3

AU - Williams, J. R.

AU - Kukolich, S. G.

PY - 1976

Y1 - 1976

N2 - Inversion relaxation cross sections for the J = 3, K = 2 upper state of NH3 were measured using a beam maser spectrometer. Scattering gases were NH3, ND3, HCl, and H2O. For NH 3-NH3 scattering the angular resolution was varied from 1.5° to 0.2° with little effect on cross sections. Cross sections for NH3 and ND3 as scattering gases were equal within experimental error. The result that beam maser cross sections are relatively independent of angular resolution is discussed. Calculated angular resolution corrections are compared with values of beam attenuation cross sections and total cross sections obtained from the present data. Comparison is made between our pure state (σI) and superposition state (σII) cross sections and recent T1 and T2 gas-cell data.

AB - Inversion relaxation cross sections for the J = 3, K = 2 upper state of NH3 were measured using a beam maser spectrometer. Scattering gases were NH3, ND3, HCl, and H2O. For NH 3-NH3 scattering the angular resolution was varied from 1.5° to 0.2° with little effect on cross sections. Cross sections for NH3 and ND3 as scattering gases were equal within experimental error. The result that beam maser cross sections are relatively independent of angular resolution is discussed. Calculated angular resolution corrections are compared with values of beam attenuation cross sections and total cross sections obtained from the present data. Comparison is made between our pure state (σI) and superposition state (σII) cross sections and recent T1 and T2 gas-cell data.

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JO - The Journal of chemical physics

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Angular resolution and isotope studies for inversion relaxation in NH ₃

Abstract

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