Figure 4
X-ray excited optical luminescence (average time-normalized response over the 1 mm × 1 mm X-ray beam footprint) as a function of the incident photon flux for the as-received diamond plates (thermal and optical grades) and for the irradiated and annealed plate. The linear–linear plot (a) is supplemented with a log–log plot (b). The dashed line connecting data for the optical grade sample in (b) illustrates nonlinear behavior. The solid lines are fits to the linear function. |