Abstract

This paper describes the fabrication of various geometries of fully depleted intrinsic germanium detectors suitable for operating at counting rates up to two million counts per second. At these high counting rates it has been observed that charge generation in undepleted regions of a detector give rise to slow current injection into the depleted region of the diode. This results in spectral degradation at high counting rates. To avoid this effect, detector geometries have been used in which the detector volume is totally depleted. The signal processing system is also described.

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