Journal
TECHNICAL PHYSICS LETTERS
Volume 44, Issue 1, Pages 73-76Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1063785018010236
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- RFBR
- Moscow City Government [15-33-70053-mol_a_mos]
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We have studied the confinement of laser plasma by shock waves (also known as spatial confinement induced on an ore sample, as exemplified by changes in the intensity of Ag I 328.07 nm and Au I 267.60 nm emission lines. It is established that the maximum increase in intensity of these lines is observed at 2- to 2.5-mu s delay, which corresponds to an increase in the plasma temperature up to 5900 K. The signal-to-noise ratio upon the spatial confinement of plasma is somewhat reduced, but the overall growth of signal intensity provides increase in the sensitivity of laser-induced breakdown spectrometry for determining trace elements in ores.
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