Abstract
The time constants associated with the capture of hot electrons by gold centres in germanium at 20 °K have been measured as a function of electric field in specimens containing NSb antimony and NAu gold atoms per cubic centimetre where NAu < NSb < 2NAu. Capture by Au2- centres dominated at high fields. The capture rate per Au2- centre at high fields was a factor 2 × 103 higher than the zero-field value, which confirmed previous results. A direct measurement of the capture rate per Au- centre at high fields was not possible and the value had to be estimated from current density measurements. This estimate gave an increase of capture rate per Au- centre over the zero-field value by a factor of about 20. The zero-field value of the capture rate per Au- centre at 20 °K was found to be 3 × 10-12 cm3 sec-1.
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