Charge collection efficiency of irradiated $n^{+}n$ wedge silicon microstrip detectors for ATLAS

The charge collection efficiency of the n sup + n silicon microstrip detectors for the ATLAS forward tracking has been evaluated for detectors irradiated with 24 GeV/c protons. The charge collection efficiency is found to be 99+-1% after a fluence of 2x10 sup 1 sup 4 protons/cm sup 2 and 81+-2% after 4x10 sup 1 sup 4 protons/cm sup 2. Furthermore, the charge collection efficiency of the detector irradiated with the lower dose does not show any dependence on the isothermal annealing up to 52 days at 20 deg. C, as it remains constant through the whole annealing cycle.