RAYLEIGH-BRILLOUIN LIGHT-SCATTERING STUDY OF SATURATED NORMAL-BUTANE BETWEEN ROOM-TEMPERATURE AND THE CRITICAL-POINT

被引:11
|
作者
SIMONSOHN, G
WAGNER, F
机构
[1] Fachbereich Physik, Freie Universitat Berlin, Berlin
关键词
D O I
10.1088/0022-3727/24/3/027
中图分类号
O59 [应用物理学];
学科分类号
摘要
In the present investigation, photon correlation spectroscopy in an extended form has been used for studying both the Rayleigh and Brillouin components of a dense fluid including their intensity ratio (Landau-Placzek ratio). As for the Brillouin component this amounts to spectroscopy in the ultrasonic region. Results for both phases of saturated n-butane in a broad temperature range are reported. They are compared with data from various sources. Although the approach to the critical temperature was limited (1.5 K for the liquid, 0.95 K for the vapour) the transition from normal to critical behaviour is distinctly marked.
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页码:415 / 421
页数:7
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