12351-95-0Relevant academic research and scientific papers
CS+ (B2Σ+-X2Σ+) emission produced from Penning ionization of the CS(X1Σ+) radical
Tsuji, Masaharu,Obase, Hiroshi,Nishimura, Yukio
, p. 2575 - 2579 (1980)
Emission spectrum resulting from the energy transfer reaction of He (2 3S) with transient CS radical produced through a microwave discharge of Ar/CS2 mixture was observed in a flowing afterglow apparatus.A new CS+ (B2Σ+ -X2Σ+) band system due to He (23S)/CS Penning ionization was identified in the 220 - 340 nm region.The dominant bands were the (v',O) and (O, v'') progressions, which was consistent with the prediction from calculated Morse potential Franck-Condon factors.Although the observed bandhead wavelengths of the major CS+ (B-X) emission werein good agreement with those predicted from the reported spectroscopic data, the (4,0) band was located at an abnormal position.It was interpreted as a consequence of vibrational perturbation in the B2Σ+ state.The relative intensities of CS+(B-X), CS+(B-A), CI, and SI emission were estimated to represent that the dominant pathway of the He (23S)/CS reaction is Penning ionization.
Reactions of Carbonyl Sulfide in a Radio-Frequency Plasma
Bezuk, Steve J.,Miller, Larry L.,Platzner, I.
, p. 131 - 136 (2007/10/02)
Carbonyl sulfide was flowed through the plasma zone of a 13.6-MHz inductively coupled discharge.The active plasma was sampled by mass and emission spectroscopy.Typical conditions were as follows: power, 5-25 W; pressure, 0.1-0.3 torr; flow rate, 4 cm3 min-1.Mass spectrometry showed the neutrals CO, S, and S2 as products.The major ions were COS+, S+, S2+, S3+, CO+, and CS2+.The variations in the ionic composition as pressure and power were changed were studied.Reaction products coat the reactor walls after some time and it was shown that this deposit could be sputtered with a CO or Ar plasma to produce sulfur-containing ions.Experiments using a small amount of 2-butyne as coreactant with COS suggested that this hydrocarbon reacted with sulfur atoms.Comparison with the chemistry of butane plus COS was made.Emission spectroscopy showed major bands due to CO* and CS*.S* emission had a lower intensity.It was shown that 5 mol percent of SF6 quenched much of the CS* emission.It is suggested that CS* is formed from electron-COS+ recombination.
