Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
LIBS using dual- and ultra-short laser pulses
Autore:
Angel, SM; Stratis, DN; Eland, KL; Lai, TS; Berg, MA; Gold, DM;
Indirizzi:
Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA Univ S Carolina Columbia SC USA 29208 m & Biochem, Columbia, SC 29208 USA Univ Calif Lawrence Livermore Natl Lab, Med Technol Program, Livermore, CA94550 USA Univ Calif Lawrence Livermore Natl Lab Livermore CA USA 94550 CA94550 USA
Titolo Testata:
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
fascicolo: 3-4, volume: 369, anno: 2001,
pagine: 320 - 327
SICI:
0937-0633(200102)369:3-4<320:LUDAUL>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED BREAKDOWN SPECTROSCOPY; INDUCED PLASMA SPECTROSCOPY; X-RAYS; ABLATION; PROBE; METALS; MICROSCOPY; EMISSION; LIQUIDS; SAMPLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Angel, SM Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA Univ S Carolina Columbia SC USA 29208 m, Columbia, SC 29208 USA
Citazione:
S.M. Angel et al., "LIBS using dual- and ultra-short laser pulses", FRESEN J AN, 369(3-4), 2001, pp. 320-327

Abstract

Pre-ablation dual-pulse LIBS enhancement data for copper, brass and steel using ns laser excitation are reported. Although large enhancements are observed for all samples, the magnitude of the enhancement is matrix dependent. Whereas all of the dual-pulse studies used ns laser excitation we see interesting effects when using ps and fs laser excitation for single-pulse LIBS. LIBS spectra of copper using 1.3 ps and 140 fs laser pulses show much lower background signals compared to ns pulse excitation. Also. the atomic emission decays much more rapidly with time. Because of relatively low backgrounds when using ps and fs pulses, non-gated detection of LIBS is shown to be very effective. The plasma dissipates quickly enough using ps and fs laser pulses, that high pulse rates, up to 1000 Hz, are effective for increasing the LIBS signal, for a given measurement time. Finally, a simple near-collinear dual-pulse fiber-optic LIBS probe is shown to be useful for enhanced LIBS measurements.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 03:34:20