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Development of Millimeter-wave Spectrometer Combined with the Supersonic Pulsed Jet Expansion

Research Project

Project/Area Number 07454153
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical chemistry
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

TANAKA Keiichi  Kyushu University Department of Chemistry Associate Professor, 理学部, 助教授 (50037280)

Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1995: ¥7,100,000 (Direct Cost: ¥7,100,000)
KeywordsMolecular Cluster / van der Waals Vibration / Millimeter-wave Spectroscopy / Supersonic Molecular Beam / ArHCN Cluster / VWM振動 / VWMの振動回転遷移
Research Abstract

The millimeter-wave spectrometer combined with pulsed supersonic jet expansion technique has been devised to measure the van der Waals (vdW) vibration transitions of molecular clusters by direct absorption observation method.
The spectrometer was applied to the measurement of rovibrational transitions in the van der Waals band of ArHCN near 200 GHz for both the SIGMA_1-SIGMA_0 and PI_1-SIGMA_0 subbands. The technique has been extended to the vdW hot band transitions (j=2-1) of ArHCN and the fundamental vdW bending band of the ArDCN isotopic species. A precise set of molecular constants, including the band origins, rotational constants, quadrupole coupling constant, and Coriolis coupling constants, was derived to detemine the potential function between Ar and HCN.The technique was also applied to observe the pure rotational transitions of ArDCN and the dueterated HCN dimmers in the microwave region.
The spectrometer was combined with discharge nozzle to detect the transient species cooled in the supersonic jet expansion. The pure rotational spectra of the CS and CN radicals and the DCO^+ ion have bee observed in the millimeter-wave region.
The new submillimeter-wave spectrometer with Backward Oscillator (BWO) was set up to observe the vdW transitions in the higher frequency region.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] Keiichi Tanaka: "Direct absorbtion observation of the vander Woals besding band of ArHCN by millimeter-wave spectiiascopy combined with pulsed-jet expansion technique" the Journal of Chemical Physics. 104・24. 9747-9753 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] K.Uemura, A.Hara and K.Tanaka: "Dinect absorption observation of the Van der Waals bending band of ArHCN by Millimeterwave spectroscopy combined with pulsed-jet expansion technique" the Journal of Chemical phycics. 104・24. 9747-9753 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Keiichi Tanaka: "Dinect absorption observation of the van der Waals bending band of Ar・HCN by millimeterwave spectroscopy combined with pulsed-jet expansion technique" Journal of Chemical Physics. 104・24. 9747-9753 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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