Nitrogen related excitation processes in a mercury bromide laser discharge |
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Authors: | H J Baker N Seddon |
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Institution: | (1) Department of Applied Physics, University of Hull, HU6 7RX Hull, UK |
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Abstract: | The role of nitrogen as a buffer gas constituent in an avalance discharge mercury bromide laser has been examined, and it is shown that a change over in excitation from electron impact dissociation of HgBr2 to energy transfer dissociation by excited nitrogen occurs at 1.5%N
2. This is explanable in terms of excitation cross-sections if considerable pumping occurs from excited states of nitrogen which are higher in energy than the metastableA state. When excitation via nitrogen is dominant, a high dischargeE/N value is needed to avoid coupling of energy to unwanted vibrational excitation. |
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Keywords: | 42 55H |
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