Remote detection of toxic and radioactive elements in sea water and ice

Details Remote detection of toxic and radioactive elements in sea water and ice Remote detection of toxic and radioactive elements in sea water and ice

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997spie.3222..508c&link_type=abstract

Proc. SPIE Vol. 3222, p. 508-514, Earth Surface Remote Sensing, Giovanna Cecchi; Edwin T. Engman; Eugenio Zilioli; Eds.

Physics

Scientific paper

The paper describes the results of experimental investigations and instrumental realization of remote method of laser induced breakdown spectroscopy (LIBS) for express diagnostics of highly toxic and radioactive elements in the water. As an example the samples of oxides of non-ferrous metals and uranium are used. The emission spectrum of materials is excited in non-equilibrium plasma of a laser spark. A laser source provides in the radiation focusing range at a wavelength of 10.6 mm the peak radiation density 108 - 5 X 107 W/cm2, the pulse duration at half-altitude is 0.3 ms. On the atmospheric experiments the radiation focusing is performed using the Cassegrainian telescope with a large mirror 0.45 m diameter. Statistical data on laser spark initiation have been obtained at distances up to 250 m - - on the solid and liquid targets.

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