Optoacoustic detection of a kinetic-cooling effect in the liquid phase.
A kinetic-cooling effect in the liquid phase has been observed by the use of pulsed optoacoustic spectroscopy. The magnitude of the optoacoustic signal in an aqueous Eu(3+) solution, as measured from the absorption of pulsed light, was found to decrease when the excitation-laser wavelength was tuned to the transition from the thermally excited (7)F(1) state to the upper electronic (5)D(0) state of Eu(3+) ion. This anomalous optoacoustic phenomenon is attributed to the kinetic-cooling effect.
S M
SM
Park
K B
KB
Shin