Distribution of Donors and Acceptors in High-Purity Germanium Crystals

The axial and radial dependence of the netconcentrations of donors and acceptors in high-purity germanium has been investigated. The methods include dc-conductivity measurements on Czochralski grown crystals, Hall effect experiments on full area slices, collimated alpha particle probing on detectors, and C-V measurements on detector arrays. Some quantitative correlations between the results of the different methods are presented. Many of the crystals exhibit internal junctions, whose influence on the properties of high-purity germanium detectors will be discussed.