ULTRAVIOLET ABSORPTION OF REFRACTORY ELEMENTS BY A DUAL LASER PLASMA METHODReport as inadecuate




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Abstract : The dual laser-produced plasma technique for the study of ionic absorption spectra has been developed by the use of two Q-switched ruby lasers to enable independent generation of the absorbing and back-lighting plasmas. Optical pulse handling is used in the coupling cicuits to enable reproducible pulse delays from 250 nsec. to 10 msec. to be achieved. At delay times > 700 nsec. spectra of essentially pure neutral species are observed. The technique is valuable, not only for obtaining the neutral spectra of highly refractory and-or corrosive materials but also for studying behaviour of ionic species as a function of time. Typical spectra are shown in Fig. 1.





Author: J. Costello W. Lynam P. Carroll

Source: https://hal.archives-ouvertes.fr/



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