Experimental investigation of the kinetics of the B{sup 2}{Sigma}{sup +} state of CN radicals in a jet of a diaphragm-type discharge at the afterglow stage

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Optics and Spectroscopy

OSTI ID:146856

Kalashnikov, E V; Kostitsyna, T G ^[1]

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1. Vavilov State Optical Institute, St. Petersburg (Russian Federation)

The vibrational temperature of the CN radical in a jet of a diaphragm-type discharge in vacuum (P{sub in}= 10 Pa) is measured at the afterglow stage. The temperature is determined from emission spectra of the violet system of the B{sup 2}{Sigma}-X{sup 2}{Sigma} bands of CN by comparing radiation intensities in bands forming sequences with {delta}v=0 and -1. In experiments with organic plasma-forming material C{sub 70}O{sub 12}H{sub 15}N{sub 10}Cl{sub 3}, an equilibrium population of the B{sup 2}{Sigma} state of CN was achieved in a wide temperature range from 9000 to 4000 K due to a high concentration of molecules (CO, N{sub 2}) and atoms (C, H, N, Cl, O) in a jet. A kinetic scheme of excitation of CN molecules in a jet is proposed. Using this scheme, the constant of quenching the state CN (B{sup 2}{Sigma}) by C, H, N, and Cl atoms is estimated at k{>=} 10{sup -9} cm{sup 3} s{sup -1}. 16 refs., 3 figs., 2 tabs.

• OSTI ID: 146856
• Journal Information: Optics and Spectroscopy, Journal Name: Optics and Spectroscopy Journal Issue: 1 Vol. 78; ISSN 0030-400X; ISSN OPSUA3
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CARBON NITRIDES
ELECTRON TEMPERATURE
EMISSION SPECTROSCOPY
KINETICS
PLASMA JETS
RADICALS
TEMPERATURE MEASUREMENT
TIME DEPENDENCE
VIBRATIONAL STATES