Compton polarimetry with a 36-fold segmented HPGe-detector of the AGATA-type

The calibration of a highly-segmented AGATA-type HPGe-detector as a γ-rayγ-ray Compton polarimeter and a method for (quasi-)continuous angle Compton polarimetry are presented. The high granularity, combined with the large detection efficiency of the AGATA-type HPGe-crystals, offers a significant advantage for polarization measurements of γ-radiationγ-radiation. A polarization-directional correlation experiment with γ-raysγ-rays from a 60Co source with an activity of about 680 kBq was used to determine the polarization sensitivity of a single AGATA-type HPGe-crystal at 1173 and 1332 keV and to demonstrate the method. The polarization measurement was based on segment information. In our set-up a polarization sensitivity of 19% at 1332 keV has been achieved.