Abstract
Electron capture measurements have been made using a double pulse method to give evidence that the two acceptor levels Ev+0.82 eV and Ec-0.24 eV originate from the same impurity centre, being a double acceptor. By comparing the photo cross-sections sigma p,10 and sigma n,10 of the first level Ev+0.82 eV with data in the literature the author concludes that the impurity is an isolated Fe atom on a Ga site.