Rotational energy distribution in a nozzle beam

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

doi:10.1063/1.1681791

Rotational energy distribution in a nozzle beam

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

Chemistry and Biochemistry

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21 Scopus citations

Abstract

The fraction of beam molecules in J =0, J = 1, and J=2 rotational states of OCS was measured as a function of pressure behind a nozzle beam source. The fractional populations were obtained from the intensities of microwave emission and absorption signals observed with a beam maser spectrometer. Total beam intensities were measured also. Large deviations from a Boltzmann rotational energy distribution were observed. The "effective rotational excitation temperature" obtained from fractional population was near 15°K for ,7=0, 40°K. for J = l, and 170°K for J =2 with 150 Torr nozzle pressure.

Original language	English (US)
Pages (from-to)	4690-4699
Number of pages	10
Journal	The Journal of chemical physics
Volume	61
Issue number	11
DOIs	https://doi.org/10.1063/1.1681791
State	Published - 1974

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.1681791

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@article{90025306599b43db8508b93e3814218b,

title = "Rotational energy distribution in a nozzle beam",

abstract = "The fraction of beam molecules in J =0, J = 1, and J=2 rotational states of OCS was measured as a function of pressure behind a nozzle beam source. The fractional populations were obtained from the intensities of microwave emission and absorption signals observed with a beam maser spectrometer. Total beam intensities were measured also. Large deviations from a Boltzmann rotational energy distribution were observed. The {"}effective rotational excitation temperature{"} obtained from fractional population was near 15°K for ,7=0, 40°K. for J = l, and 170°K for J =2 with 150 Torr nozzle pressure.",

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

year = "1974",

doi = "10.1063/1.1681791",

language = "English (US)",

volume = "61",

pages = "4690--4699",

journal = "The Journal of chemical physics",

issn = "0021-9606",

publisher = "American Institute of Physics",

number = "11",

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TY - JOUR

T1 - Rotational energy distribution in a nozzle beam

AU - Kukolich, S. G.

AU - Oates, D. E.

AU - Wang, J. H.S.

PY - 1974

Y1 - 1974

N2 - The fraction of beam molecules in J =0, J = 1, and J=2 rotational states of OCS was measured as a function of pressure behind a nozzle beam source. The fractional populations were obtained from the intensities of microwave emission and absorption signals observed with a beam maser spectrometer. Total beam intensities were measured also. Large deviations from a Boltzmann rotational energy distribution were observed. The "effective rotational excitation temperature" obtained from fractional population was near 15°K for ,7=0, 40°K. for J = l, and 170°K for J =2 with 150 Torr nozzle pressure.

AB - The fraction of beam molecules in J =0, J = 1, and J=2 rotational states of OCS was measured as a function of pressure behind a nozzle beam source. The fractional populations were obtained from the intensities of microwave emission and absorption signals observed with a beam maser spectrometer. Total beam intensities were measured also. Large deviations from a Boltzmann rotational energy distribution were observed. The "effective rotational excitation temperature" obtained from fractional population was near 15°K for ,7=0, 40°K. for J = l, and 170°K for J =2 with 150 Torr nozzle pressure.

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U2 - 10.1063/1.1681791

DO - 10.1063/1.1681791

M3 - Article

AN - SCOPUS:51149220701

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VL - 61

SP - 4690

EP - 4699

JO - The Journal of chemical physics

JF - The Journal of chemical physics

IS - 11

ER -

Rotational energy distribution in a nozzle beam

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