Figure 5
(a) 55Fe spectrum with a pn-CCD in a flat-field measurement at a readout speed of 4 ms for a 3 × 1 cm large pn-CCD detector. The FWHM of the Mn Kα peak is only 130 eV. (b) The measured quantum efficiency in a DC photocurrent measurement (solid line) and in a single-photon counting mode (×). |