Figure 6

(a) RL peak values and (b) fE peak values of PVP (333) sample and PVP (500) sample with different thickness of 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm and 2.6 mm.
(a) RL peak values and (b) fE peak values of PVP (333) sample and PVP (500) sample with different thickness of 1.6 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.4 mm and 2.6 mm.