Measurements of rotational relaxation cross sections for H2CO

P. B. Foreman; K. R. Chien; S. G. Kukolich

doi:10.1016/0009-2614(74)85035-9

Measurements of rotational relaxation cross sections for H₂CO

P. B. Foreman, K. R. Chien, S. G. Kukolich

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

8 Scopus citations

Abstract

Cross sections for the 1₁₁, 1₁₀, 2₁₂, and 2₁₁ rotational states and for total beam attenuation of H₂CO were measured using a beam maser spectrometer. Significant inelastic scattering in the forward direction was obtained for He and CF₃H. Significant inelastic contributions were not observed using H₂ as a scattering gas. Observed cross sections for the 1₁₁ state are larger than those for the 1₁₀ state. The relations of the present cross sections to various models for obtaining a low excitation temperature for the 1₁₁-1₁₀ doublet of formaldehyde in interstellar space is discussed.

Original language	English (US)
Pages (from-to)	295-297
Number of pages	3
Journal	Chemical Physics Letters
Volume	29
Issue number	2
DOIs	https://doi.org/10.1016/0009-2614(74)85035-9
State	Published - Nov 15 1974
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "Measurements of rotational relaxation cross sections for H2CO",

abstract = "Cross sections for the 111, 110, 212, and 211 rotational states and for total beam attenuation of H2CO were measured using a beam maser spectrometer. Significant inelastic scattering in the forward direction was obtained for He and CF3H. Significant inelastic contributions were not observed using H2 as a scattering gas. Observed cross sections for the 111 state are larger than those for the 110 state. The relations of the present cross sections to various models for obtaining a low excitation temperature for the 111-110 doublet of formaldehyde in interstellar space is discussed.",

author = "Foreman, {P. B.} and Chien, {K. R.} and Kukolich, {S. G.}",

year = "1974",

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doi = "10.1016/0009-2614(74)85035-9",

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journal = "Chemical Physics Letters",

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T1 - Measurements of rotational relaxation cross sections for H2CO

AU - Foreman, P. B.

AU - Chien, K. R.

AU - Kukolich, S. G.

PY - 1974/11/15

Y1 - 1974/11/15

N2 - Cross sections for the 111, 110, 212, and 211 rotational states and for total beam attenuation of H2CO were measured using a beam maser spectrometer. Significant inelastic scattering in the forward direction was obtained for He and CF3H. Significant inelastic contributions were not observed using H2 as a scattering gas. Observed cross sections for the 111 state are larger than those for the 110 state. The relations of the present cross sections to various models for obtaining a low excitation temperature for the 111-110 doublet of formaldehyde in interstellar space is discussed.

AB - Cross sections for the 111, 110, 212, and 211 rotational states and for total beam attenuation of H2CO were measured using a beam maser spectrometer. Significant inelastic scattering in the forward direction was obtained for He and CF3H. Significant inelastic contributions were not observed using H2 as a scattering gas. Observed cross sections for the 111 state are larger than those for the 110 state. The relations of the present cross sections to various models for obtaining a low excitation temperature for the 111-110 doublet of formaldehyde in interstellar space is discussed.

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

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