Low Energy Gamma Radiation Induced Effects on Ultrasonic Velocity and Acoustic Parameters in Polyvinylidene Fluoride Solution

Table 3

Variation of density, viscosity, and ultrasonic velocity of 0.2 wt% PVDF solution in dimethylacetamide with dose rate.

Dose (mGY)	Density ρ; kg/m^3	Viscosity η Nsm^−2 10^−3	Ultrasonic velocity m/s	Compressibility β; 10^−10	Intermolecular free path length 10^−11	Acoustic impedance 10^6	Relative association	Ultrasonic attenuation 10^−14	Relaxation time 10^−13
0	949.73	1.114	1488.3	4.714	4.459	1.425	—	2.786	6.999
504.756	956.83	1.399	1492.2	4.666	4.436	1.436	1.003	3.455	8.704
673.008	957.62	1.491	1495.3	4.627	4.417	1.445	1.005	3.643	9.198
1346.016	1112.25	1.661	1498.8	4.598	4.404	1.451	1.004	4.025	10.185
1394.016	1114.76	1.762	1501.7	4.571	4.390	1.457	1.004	4.235	10.738

Source: Cs-137. Source strength: 28.042 mGY/hrwt% is 0.2%.