0.20 
Oo 
on 
0.05 
Reflection Coefficient (K,) 
ro) 
re) 
O 50 100 150 200 
Cumulative Time (hr) 
Figure 4. Reflection coefficient variation 
in experiment 72B-06. 
0.25 
0.20 
OS 
0.10 
Reflection Coefficient (K,) 
0.05 
0 50 100 150 200 
Cumulative Time (hr) 
Figure 5. Reflection coefficient variation along 
center range in experiment 72B-10. 
22 
