Laser optogalvanic studies of NH3 in DC discharges

Singh, Kuldip ; D'Cunha, Romola ; Kartha, V. B. (1990) Laser optogalvanic studies of NH3 in DC discharges Optics Communications, 79 (1-2). pp. 33-40. ISSN 0030-4018

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Optogalvanic signals in low pressure dc discharges of ammonia have been investigated with a line tunable cw CO2 laser. Signals from excitation of ground as well as excited vibrational states have been studied, using both transverse and axial irradiation of the discharge. The data have been used to provide an estimate of the vibrational and rotational temperatures in the discharge. The vibrational of the signal with the discharge current and sample pressure have been studied for various fundamental and hot band transitions. It is shown that photon enhanced dissociative electron attachment is the principal mechanism for the OG signals in the negative glow region.

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Source:Copyright of this article belongs to Elsevier Science.
ID Code:17846
Deposited On:16 Nov 2010 12:36
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