Abstract

The temporal evolution of the optogalvanic signals have been investigated in detail in a Hg-argon discharge by irradiating it with an excimer pumped dye laser. The signals at 4510.7, 4596 and 4628.4 Å exhibited anomalous behaviour. Analysis of the data revealed that the excited Ar and Hg atoms respectively in the 1P 1 and 3P 1 states participated in energy transfer collisions, causing atomic mercury to excite to an ionized energy state, while simultaneously the argon atom relaxes to its ground state.

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