dc.creator Takada, Hideyuki en_US dc.creator Sumiyoshi, Yoshihiro en_US dc.creator Endo, Yasuki en_US dc.creator Hoshina, K. en_US dc.date.accessioned 2006-06-15T19:11:44Z dc.date.available 2006-06-15T19:11:44Z dc.date.issued 1998 en_US dc.identifier 1998-WH-10 en_US dc.identifier.uri http://hdl.handle.net/1811/19173 dc.description Author Institution: Department of Pure and Applied Sciences, College of Arts and Sciences; Department of Chemistry, School of Science en_US dc.description.abstract New electronic transitions of a carbon chain radical containing a nitrogen atom have been observed by LIF spectroscopy. The radical was produced in a supersonic jet by a pulsed discharge of $HC_{3}N$ diluted to 0.3\% with 3atm Ar. We confirmed that the radical contains a nitrogen atom from the fact that the spectrum was not observed when $C_{2}H_{2}$ was used as a precursor. About ten vibronic bands with a 50nsec radiative lifetime have been observed in a region from 27000 to $27400 cm^{-1}$. The observed bands could be classified as $^{2}\Pi_{3/2}-^{2}\Pi_{3/2}$ and $^{2}\Sigma - ^{2}\Sigma$ vibronic bands. The lower state rotational constants of the vibronic bands have been determined to be 0.07537(1) and $0.07932(5) cm^{-1}$ for the $\Pi$ and $\Sigma$ states, respectively. The upper states of $^{2}\Sigma - ^{2}\Sigma$ bands have very large spin-rotation constants, which should be denoted as $\Sigma^{(\pm)}$ subjected to a small Renner-Teller interaction. The new molecule has been tentatively assigned to be the $C_{4}N$ radical. We performed an UMP2 level ab initio calculation with $6-311G^{\ast \ast}$ basis sets for the $C_{4}N$ radical. The estimated rotational constant in the ground state was $0.077 cm^{-1}$. This value agrees well with the observed rotational constants. en_US dc.format.extent 141022 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title LIF SPECTROSCOPY OF A CARBON CHAIN RADICAL PRODUCED BY A $HC_{3}N$ DISCHARGE en_US dc.type article en_US
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