Pulsed laser photothermal spectroscopy of liquids and solids

Technical Report · Mon Sep 25 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/7102225· OSTI ID:7102225

Eyring, E. M.

Published papers have compared the advantages of piezoelectric and optical detection of photoacoustic signals in sample liquids and have demonstrated the superior capabilities of thermal lens measurements on time scales as short as a few hundred nanoseconds. Computer programs have been developed to compare theoretical and experimental photoacoustic pulse shapes in liquids with a view to determining triplet state quantum yields and radiationless decay lifetimes with greater accuracy. Non-radiative quantum yields of 1.0, 0.9 and 0.5 have been measured for nonaqueous solutions of Crystal Violet, Evan's Blue and Nile Blue A respectively. Pulsed photothermal radiometry experiments have yielded thermal diffusivity data for a room temperature molten salt system. Microphonic photoacoustic signals obtained by illuminating solid samples with synchrotron x-rays have been enhanced with volatile liquids, and the results have been compared with theory.

• Research Organization: Utah Univ., Salt Lake City, UT (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-84ER13227
• OSTI ID: 7102225
• Report Number(s): DOE/ER/13227-6; ON: DE90008642
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
656003* -- Condensed Matter Physics-- Interactions between Beams & Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIFFUSION
DOCUMENT TYPES
ELECTRICITY
FLUIDS
LASER SPECTROSCOPY
LENSES
LIQUIDS
PHOTOACOUSTIC EFFECT
PIEZOELECTRICITY
PROGRESS REPORT
SOLIDS
SPECTROSCOPY
THERMAL DIFFUSION