Dead layer measurements on diode detectors

The goal of the abBA experiment involves coincidence measurements of protons and electrons from the neutron beta decay. While electron detection is rather straightforward, the detection of the protons is complicated due to their low energies. In order to understand the detector reponse and to determine the lower cut off value for the energy a technique for determining the thickness of the dead layer has been developed. A discussion of the measurement and of the results will be presented.