Each of the LCAE Samples were wrapped thrice with PTFE Tape and then clamped at a fixed distance from the face of the monochrometer, with the axis of the cylindrical samples perpendicular to the circular face of the monochrometer . A UV LED was used to illuminate the back face of the sample. The LED was positioned about a mm away from the back face of the sample. A photodiode was used to measure the power of the light output from the monochrometer and a graph of Power vs Wavelength was plotted.

This procedure was repeated for LCAE samples 0A and 0B(0.0% Gd), LCAE-01(0.5% Gd), LCAE -02(1.0% Gd) and LCAE -03(2.0% Gd)

The UV LED was given a bias of 8.45V from the 8110A Unit. The distance between the LED and the face of the sample was set to about a millimeter. The monochrometer was made to cycle over wavelength range of 350nm-600nm.

Figure 2:First Peak at 428nm, Second Peak at 448nm

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