TITLE:
The Study of Optoacoustic First and Second Sound Waves in Superfluid Helium under the Effect of Gaussian Laser Light Considering Electrostriction Mechanism
AUTHORS:
Leyla Safaei Kouchaksaraei
KEYWORDS:
Electrostriction Mechanism, First and Second Sound Waves, Gaussian Laser Light, Superfluid Helium
JOURNAL NAME:
Journal of Modern Physics,
Vol.6 No.7,
June
11,
2015
ABSTRACT: The
present paper is aimed to study the effect of Gaussian laser light on first and
second sound waves in superfluid helium theoretically using optoacoustic
method. The mechanism applied in this study is electrostriction mechanism. This
study considers crystal parts of superfluid helium with a zero absorption
coefficient applying electrostriction mechanism. Affecting Gaussian laser light
on these crystal parts, a spectrum of cylindrical first and second sound waves
and cylindrical slow and rapid waves is obtained. Meanwhile, frequency of waves
amplitudes proportionate to time period of laser light is calculated.