Kinetic investigation of C(23PJ) by photoelectric measurement of the attenuation of atomic emission in the vacuum ultra-violet

✍ Scribed by D. Husain; L.J. Kirsch

• Publisher: Elsevier Science
• Year: 1971
• Tongue: English
• Weight: 1021 KB
• Volume: 8
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(71)80087-8

✦ Synopsis

A system is described for the kinetic study of ground sta!c 1 zirbon atoms in the p,as phase. C(?PJ)_ generated from the flash photolysis of carbon suboxide in the Schumann region. has been monitored photoelectrically in absorption by time-resolved nttemmtion of the emission XL 165.7 nm {3x$ --Z3P~I, derived from a microwave powered atomic flow lamp. Kinetic analysis of (he decay of the Mom in the presence of nitric oxide yielded ;I value of the second order rate constant for the reaclion C(Z3P J ) -NO -* CN &O of k2 : 7.3 4 2.2 9 lo-11 cm3 molecule-lsec-1 (300OK). The reactions of atomic carbon are of fundamental chemical interest and have been widely studied in recent years [1,2]. However, despite the importance of free carbon atoms in combustion processes, and their theoretical interest to the chemical kinetics of atoms in defined quantum states, quantitativerate data are very limited. The high intrinsic chemical potential [l]

of free atomic carbon is responsible for difficulties both in producing and observing this highly reactive species.. Braun and co-workers