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INFRARED ABSORPTION SPECTROSCOPY OF JET-COOLED MOLECULAR IONS

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/13265

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Title: INFRARED ABSORPTION SPECTROSCOPY OF JET-COOLED MOLECULAR IONS
Creators: Fukushima, Masaru; Chan, Man-Chor; Xu, Yunjie; Taleb-Bendiab, A.; Amano, T.
Issue Date: 1994
Abstract: Protonated molecular ions $H^{+}_{3}, HN^{+}_{2}$, and $H_{3}O^{-}$ generated in a ``hollow-cathode” type discharge jet have recently been studied using infrared absorption spectroscopy. The rotational temperatures of these ions in the ground state were determined to be 120 $\pm 20K, 273 \pm 20 K and 150 \pm 20 K for H, HN^{+}_{2},$ and $H_{3}O^{+}$, respectively. This observation suggests different dynamics of ion formation under jet-expansion compared to usual hollow-cathode discharge cells, in which the rotational temperatures of the ions are determined by the temperature of the $coolant.^{1}$ The spectral linewidths and the concentrations of the ions at different positions of the jet stream will also discussed to shed light on the dynamic characteristics of the hollow-cathode discharge jet.
URI: http://hdl.handle.net/1811/13265
Other Identifiers: 1994-TE'-03
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