Phonon spectroscopy

Details Phonon spectroscopy Phonon spectroscopy

1979-07-25

1981-01-06

Woodiel, Donald O.

Measuring and testing

Gas content of a liquid or a solid

By vibration

G01N 2500

Patent

active

042429056

ABSTRACT:
A versatile method of phonon spectroscopy in which frequency crossing effects are utilized. A heat current is passed through a composite structure incorporating two bodies respectively containing different types of resonant phonon-scattering center. A varying external perturbation, suitably a magnetic field, is applied to the structure so as to affect the resonant frequency for only one of these types. The temperature difference between two points on the structure is monitored as the perturbation varies, this temperature difference exhibiting an excursion when the resonant frequencies for the two types of center coincide.

REFERENCES:
Spectrum, No. 149 (1977), pp. 9-11.
Challis et al., "An Analysis of the Effects of Frequency Crossing in the Resonant Scattering of Thermal Phonons", J. of Physics C., vol. 8 (1975), pp. 1475-1505.

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