X-ray sensitivity of a charge-coupled-device array

Abstract
The quantitative response of a charge‐coupled device(CCD) to x rays in the 5–14‐keV range was measured and computed. Comparison of experimental and theoretical quantum efficiencies provides a method to determine electron diffusion lengths in these devices. Compared to a common x‐ray film, the CCDamplifier combination tested in this work has a similar threshold and significantly smaller range of response. The CCD offers somewhat poorer spatial resolution than the x‐ray film. Comparisons of the CCD with other active x‐ray detectors are also presented.