P R Sasi Kumar
Articles written in Pramana – Journal of Physics
Volume 36 Issue 4 April 1991 pp 423-427 Research Articles
Observation of two-photon induced photoemission optogalvanic effect
P R Sasi Kumar G Padmaja A V Ravi Kumar V P N Nampoori C P G Vallabhan
Observation of laser induced two-photon photoemission optogalvanic (TPPOG) effect from tungsten electrode in a discharge cell using 564 nm radiation obtained from a pulsed dye laser is described. The magnitude of the POG signal is studied as a function of laser energy under various discharge parameters. Competition between one-photon and two-photon processes has been observed when nitrogen gas is used in the discharge cell.
Volume 40 Issue 2 February 1993 pp 113-118
High resolution optogalvanic study in nitrogen discharge
P R Sasi Kumar B Ambadi V P N Nampoori C P G Vallabhan
Doppler limited high resolution spectrum in the wavelength region 17224 to 17236 cm−1 of the first positive system (
Volume 42 Issue 5 May 1994 pp 427-433
P R Sasi Kumar V P N Nampoori C P G Vallabhan
The changes in emission characteristics of a neon hollow cathode discharge by resonant laser excitation of 1
Volume 97, 2023
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