Concept

Acoustic scale

Publications associées (7)

Thermodynamic description of generation of the second acoustic harmonics induced by an electric field in ferroelectrics

The temperature behavior of the generation of the second acoustic harmonics induced by an electric field during the transition of a crystal to the ferroelectric state has been considered based on the thermodynamic approach in the framework of the Landau mo ...

2011

Cavity ring-down spectroscopy of jet-cooled silane isotopologues in the Si-H stretch overtone region

Rainer Beck, Régis Bisson, Marco Sacchi, Thanh Tung Dang

Absorption spectra of silane in the region of the first overtone of the Si-H stretch vibration have been recorded in a seeded supersonic jet expansion by cavity ring-down spectroscopy as well as in a static gas cell at room temperature by photoacoustic spe ...

2007

Comparison of several methods to characterise the high frequency behaviour of piezoelectric ceramics for transducer applications

Dragan Damjanovic

Thickness mode resonances in commercial piezoelectric ceramics have been characterised as a function of frequency by two methods. The first is based on a fit on the electrical impedance for the fundamental and the overtones. This method has been applied to ...

2000

Intramolecular energy transfer in highly vibrationally excited methanol. II. Multiple time scales of energy redistribution

Thomas Rizzo

State-selected spectra of the OH stretch overtones of methanol in the range of upsilon(1) = 3-8 reveal spectral splittings and broadenings that result from vibrational couplings within the molecule. We employ a two-color excitation technique in which an in ...

1999

Intramolecular energy transfer in highly vibrationally excited methanol .1. Ultrafast dynamics

Thomas Rizzo

Vibrational overtone excitation of jet-cooled methanol, in combination with infrared laser assisted photofragment spectroscopy (IRLAPS) detection, reveals OH stretch bands that are significantly simplified with respect to room-temperature spectra. The simp ...

1997

Secondary time scales of intramolecular vibrational energy redistribution in CF3H studied by vibrational overtone spectroscopy

Thomas Rizzo

Rotationally resolved vibrational overtone spectra of several CH stretch bands of CF3H have been obtained using a combination of jet-cooling, infrared-optical double-resonance, and infrared laser assisted photofragment spectroscopy detection. The high sele ...

1996

Unimolecular dissociation of hydrogen peroxide from single rovibrational states near threshold

Thomas Rizzo

Infrared-optical double resonance excitation of hydrogen peroxide using the v3 + v5 and V2 + v5 combination bands as intermediate levels prepares reactant molecules in single rotational states near the OO dissociation threshold. The band origins of the DEL ...

1991

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