SUBMILLIMETER-WAVE ROTATIONAL SPECTROSCOPY OF H{sub 2}F{sup +}

Five pure rotational transitions of H{sub 2}F{sup +} generated by a discharge in an HF/H{sub 2}/Ar mixture were observed in the range 473-774 GHz with a backward-wave oscillator based submillimeter-wave spectrometer. A simultaneous analysis of the rotational lines with 120 combination differences fo...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2011-03, Vol.729 (1)
Main Authors: Fujimori, R., Kawaguchi, K., Amano, T.
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ATOMIC AND MOLECULAR PHYSICS
DISPERSIONS
ELECTRIC DISCHARGES
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUORINE COMPOUNDS
GROUND STATES
HALOGEN COMPOUNDS
HYDROFLUORIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
INFRARED SPECTRA
INORGANIC ACIDS
INORGANIC COMPOUNDS
INTERSTELLAR SPACE
MEASURING INSTRUMENTS
MIXTURES
NONMETALS
OSCILLATORS
ROTATIONAL STATES
SPACE
SPECTRA
SPECTROMETERS
SPECTROSCOPY
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Summary:Five pure rotational transitions of H{sub 2}F{sup +} generated by a discharge in an HF/H{sub 2}/Ar mixture were observed in the range 473-774 GHz with a backward-wave oscillator based submillimeter-wave spectrometer. A simultaneous analysis of the rotational lines with 120 combination differences for the ground state derived from the infrared spectra was carried out to determine the precise molecular constants for the ground state. The rotational transition frequencies that lie below 2 THz were calculated, together with their estimated uncertainties, to facilitate future astronomical identifications. The chemistry for H{sub 2}F{sup +} formation in interstellar space is discussed in comparison with a case for recently detected H{sub 2}Cl{sup +}.
ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/729/1/L2