Time-dependence and annealing-temperature effects were studied in various n-type samples which had been irradiated with swift heavy ions, protons and electrons. Deep level transient spectroscopy measurements showed that the main peak, which was located at about 200K and had previously been attributed to the A-center complex, was instead due to the E-center complex; with an energy level located at Ec-0.41eV. In the case of swift heavy ions and protons, this peak included another component which could be related to a multi-vacancy complex defect.

Study of Electron, Proton and Swift Heavy Ion Irradiation of n-Type Germanium Using Deep Level Transient Spectroscopy. A.Colder, M.Levalois, P.Marie: Journal of Applied Physics, 2000, 88[5], 3082-4