Brillouin Scattering Studies of the Polarization Relaxation Time in Rubidium Hydrogen Sulfate

1981 ◽  
Vol 50 (1) ◽  
pp. 184-188 ◽  
Author(s):  
Yuhji Tsujimi ◽  
Toshirou Yagi ◽  
Haruyasu Yamashita ◽  
Itaru Tatsuzaki
Keyword(s):  
Relaxation Time ◽  
Brillouin Scattering ◽  
Hydrogen Sulfate

Druckabhängigkeit der Relaxationszeit in flüssigem CCl4 / Pressure-dependence of the Relaxation Time in Liquid CCl4

1974 ◽  
Vol 29 (11) ◽  
pp. 1622-1630 ◽  
Author(s):  
M. Sedlacek
Keyword(s):  
Relaxation Time ◽  
Pressure Dependence ◽  
Vibrational Relaxation ◽  
Brillouin Scattering ◽  
Liquid Density

The vibrational relaxation time in liquid carbontetrachloride (at 25 °C) has been investigated by Brillouin scattering for pressures ranging up to 1250 bars. From the relation between the liquid density (as a function of pressure) and the relaxation time the diameter of the CCl4-molecule has been calculated. It was found to be 5.31 ± 0.05 Å.

Die spezifische Wärme der zweiten Relaxationsstufe der Essigsäure

1979 ◽  
Vol 34 (2) ◽  
pp. 207-210 ◽  
Author(s):  
A. Asenbaum
Keyword(s):  
Acetic Acid ◽  
Relaxation Time ◽  
Specific Heat ◽  
Experimental Error ◽  
Brillouin Scattering ◽  
Relaxation Frequency ◽  
Increasing Temperature

Abstract The The relaxation time σv in liquid acetic acid was measured by Brillouin scattering for temperatures in the range between 20 °C and 60 °C. At 20 °C σv is equal to 56,2 ps corresponding to a relaxation frequency fR2 of 2,51 GHz. fR2 is increasing with increasing temperature and there-fore shows the same behaviour as the first relaxation frequency fR1 measured by Lamb and Pinkerton. From σv and the hypersound-velocity and hypersound damping data the relaxing specific heat ci2 has been calculated (ci2 = 0,125 cal/g K at 20 °C). In contrast to the specific heat ci1 of the first relaxing step of acetic acid ci2 seems to be temperature independent within the experimental error

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