58 research outputs found
Análise multielementar em solos utilizando espectroscopia de emissão óptica com plasma induzido por laser operando em regime de pulso duplo.
Depth profile investigations of surface modifications of limestone artifacts by laser-induced breakdown spectroscopy.
Made available in DSpace on 2017-11-01T23:23:05Z (GMT). No. of bitstreams: 1
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Previous issue date: 2017-10-30bitstream/item/165807/1/PROCI-17-Depth-profile-investigations....pd
Characterization of organic matter in spodosol amazonian by fluorescence spectroscopy.
Made available in DSpace on 2017-11-01T23:24:04Z (GMT). No. of bitstreams: 1
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Previous issue date: 2017-10-30bitstream/item/165808/1/PROCI-17-Characterization-of-organic-matter....pd
Espectroscopia de emissão óptica com plasma induzido por laser: um novo e versátil caminho para análise e monitoramento de solos, plantas e adubos.
Análise de solos utilizando técnicas fotônicas visando o desenvolvimento de equipamentos portáteis para medidas in situ.
entrada padronizada: MILORI, D. M. B. P
Análise do potencial da técnica de espectroscopia de emissão de plasma induzido por laser em avaliar textura de solos.
Laser-induced breakdown spectroscopy associated with multivariate analysis applied to discriminate fertilizers of different nature.
Made available in DSpace on 2017-11-24T23:20:19Z (GMT). No. of bitstreams: 1
PLaserinducedbreakdown....pdf: 277933 bytes, checksum: cfd2c91da7bb377fd7e089171b43d4b1 (MD5)
Previous issue date: 2017-11-24bitstream/item/167439/1/P-Laser-induced-breakdown....pd
Time progression of ultrashort laser ablation in a transparent material
Laser ablation on the ultra-short-pulses regime (femtosecond), has an impact on materials processing and micromachining in a quite profound ways. The investigation of the time progression of the laser ablation process within the material can produce much information and it is not conventionally used. The implementation of such study is the main aim of this paper. The temporal dependence of the diameter and depth of micro-drilling in the sample was verified, beyond the simple understanding of the mechanism for plasma generated during the ablation. From the monitoring of the time progression of the ablation, the time dependence for the velocity of ablation had been determined. In most cases, fume attenuation of the incoming laser beam and fume escape paths, produce dominant influence the characteristics of the region ablated. The method here employed is simple and can be carried out in real time without interruption of the process. In the implemented method light scattered from an auxiliary source allow visualization and record of the ablated geometry as it progress.CAPESCNPqFAPES
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