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ANSTO Publications Online >
ANSTO Publications >
Scientific and Technical Reports >
Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/863
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| Title: | Restoration of lithium driftability in some vacuum-grown germanium crystals for gamma-ray detectors. |
| Authors: | Tavendale, AJ |
| Issue Date: | Nov-1970 |
| Publisher: | Australian Nuclear Science and Technology Organisation |
| Abstract: | Germanium crystals used for γ-ray detectors frequently exhibit slow or non-uniform lithium-ion drift. The presence of oxygen is one known cause. However, it has been found in these laboratories that in large (~ 1kg) germanium crystals grown by the Czochralski method under vacuum, the presence of a fast diffusing impurity (probably copper) also leads to variable drift. Normal, uniform drift in these crystals has been restored by using gallium-indium alloys as a getter at ~ 800°C. The method is described in detail and the effects on crystal resistivity, dislocation density and lithium drift rate are presented. Gamma-ray detectors fabricated from gettered material show high resolution characteristics. |
| URI: | http://apo.ansto.gov.au/dspace/handle/10238/863 |
| ISBN: | 0642993882 |
| Appears in Collections: | Scientific and Technical Reports |
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