Quenching of fluorescence from Na(32P) and K(42P) atoms following photodissociation of NaCl and KCl at 193 nm |
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| Authors: | K T Hartinger S Nord P B Monkhouse |
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| Institution: | Institut für Physikalisches Chemie der Universit?t Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany (Fax: +49-6221/54-4255), DE
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| Abstract: | Quenching of fluorescence from Na(32
P) and K(42
P) atoms by various collision partners was studied at 973 and 1273K. Excited alkali atoms were produced photolytically by excimer
laser light at 193nm. For each collision pair, the appropriate relative velocity was computed and used to evaluate the quenching
cross-section from the measured rate constants. Cross sections for CO2, O2 and N2 are large (10–60Å2) while for Ar, the values are <1 Å2. The results are compared with those of previous investigations as a function of relative velocity. Finally, implications
for combustion diagnostics are briefly discussed.
Received: 29 March 1996 |
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| Keywords: | PACS: 33 50 34 00 82 20 |
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