Optoacoustic Spectroscopy
Mostrando 1-3 de 3 artigos, teses e dissertações.
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1. Photoacoustic spectroscopy applied to glass transition temperature determination of polymers / Aplicação da espectroscopia fotoacústica na determinação da temperatura de transição vítrea de polímeros
Photoacoustic spectroscopy (PAS) is a non-destructive technique and it has been largely applied to the thermal and optical characterization of materials. PAS technique is based on the photoacoustic effect which consist, basically, absorption of a modulated electromagnetic radiation and generation of heat inside of the material studied (sample), by a nonradia
Publicado em: 2010
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2. Bombeamento optico de moleculas polares por laser selado de 13 ANTPOT. ( C O IND. 2 ) para geração de ondas Terahertz / Optically pumped of polar molecules for sealled-off 13 ANTPOT. ( C O IND. 2 ) laser for generation Terahertz waves
Neste trabalho realizamos três importantes etapas: 1) montar e caracterizar um laser selado de 13C02, 2) empregar o laser selado de 13C02 como fonte de bombeamento óptico para a molécula de metanol CH30H, e utilizá-lo pela primeira vez, para excitar o isótopo de metanol 13CH30H para geração de ondas na região do TeraHertz (THz) e 3) Propor "assignmen
Publicado em: 2007
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3. Visible absorption spectrum of liquid ethylene
The visible absorption spectrum of liquid ethylene at ≈ 108 K from 5500 Å to 7200 Å was measured by using a pulsed tunable dye laser, immersed-transducer, gated-detection opto-acoustic spectroscopy technique. The absorption features show the strongest band with an absorption coefficient of ≈2 × 10-2 cm-1 and the weakest band with an absorption coeffic