dc.creator Okabayashi, Yusuke en_US dc.creator Tang, Jian en_US dc.creator Miyamoto, Yuki en_US dc.creator Kawaguchi, Kentarou en_US dc.date.accessioned 2013-07-16T21:35:32Z dc.date.available 2013-07-16T21:35:32Z dc.date.issued 2013 en_US dc.identifier 2013-RH-12 en_US dc.identifier.uri http://hdl.handle.net/1811/55243 dc.description Author Institution: Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Okayama 700-8530, Japan en_US dc.description.abstract Time-resolved double resonance (TRDR) method has been used to study the rotational and vibrational relaxiation for a long time. However, the study of IR-IR TRDR in the 3$\mu$m region has been very limited due to the lack of powerful tunable IR lasers in this region. In the present study, we used a tunable pulsed OPO IR laser (6 mJ@6 ns, $\sim$0.2 cm$^{-1}$ linewidth) and a tunable cw-OPO IR laser (up to 200 mW, $\sim$3 MHz linewidth) both in the 3$\mu$m region to study the IR-IR TRDR for the $\nu_4$ and $2\nu_4-\nu_4$ vibrational bands of CH$_{3}$F. The pulsed IR laser pumps CH$_{3}$F from the ground state to a certain rotational level ($J, K$) of v$_4=1$, and the cw IR laser probes this ($J, K$) level by the $2\nu_4-\nu_4$ ladder transition. A time profile for the transition intensity of the probe line gives the $T_1$ relaxiation time for the ($J, K$) level of v$_4=1$. The pressure dependence of $T_1$ for various ($J, K$) levels of v$_4=1$ was obtained, which can be compared with the linewidth measurement, 2083 (1990).} for the $\nu_4$ band of CH$_{3}$F. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title TIME-RESOLVED IR-IR DOUBLE RESONANCE FOR THE $\nu_4$ and $2\nu_4-\nu_4$ VIBRATION-ROTATION TRANSITIONS OF CH$_{3}$F en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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