OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

OBSERVATION OF THE $3\nu_{2}\leftarrow 0$ OVERTONE BAND OF $H_{3}^{+}$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/12492

Show full item record

Files Size Format View
1991-TA-07.jpg 142.0Kb JPEG image Thumbnail of OBSERVATION OF THE $3\nu_{2}\leftarrow 0$ OVERTONE BAND OF $H_{3}^{+}$

Title: OBSERVATION OF THE $3\nu_{2}\leftarrow 0$ OVERTONE BAND OF $H_{3}^{+}$
Creators: Lee, S. S.; Ventrudo, Brian F.; Cassidy, Daniel T.; Oka, T.; Miller, S.; Tennyson, Jonathan
Issue Date: 1991
Abstract: We report the observation the second overtone $band^{1}$ $(3\nu_{2}(1=1)\leftarrow 0)$ of $H_{3}^{+}$ using a 1.45 $\mu m$ InGaAsP near infrared diode laser with the short external cavity mode control technique developed at McMaster $University.^{2}$ $H_{3}^{+}$ was generated using 1.5 Torr of $H_{2}$ with or without $4 \sim 5$ Torr of He in a liquid-$N_{2}$ cooled multiple-inlet-multiple-outlet discharge cell. The $H_{3}^{+}$ signal was detected with velocity modulation or ion concentration modulation in an AC glow discharge. Altogether four lines have been observed in the region of 6860--6925 $cm^{-1}$. The positions of the lines were determined using a wavemeter calibrated with $H_{2}O$ reference lines. The assignment of the transitions is based on Miller and Tennyson’s first principles $calculation^{3}$ and on observed temperature dependence of the relative intensities. Extended search of other transitions is being conducted. It is our hope that this observation may lead to detection of $H_{3}^{+}$ in higher vibrational states in Jupiter and other astronomical objects, and that it may also help in the assignment of the laboratory FTIR emission spectrum of hydrogen plasma.
URI: http://hdl.handle.net/1811/12492
Other Identifiers: 1991-TA-7
Bookmark and Share