Polarimetricperformanceof Si/CdTesemiconductorComptoncamera

A Compton camera has been developed based on Si and CdTe semiconductor detectors with high spatial and spectral resolution for hard X-ray and -ray astrophysics applications. A semiconductor Compton camera is also an excellent polarimeter due to its capability to precisely measure the Compton scattering azimuth angle, which is modulated by linear polarization. We assembled a prototype Compton camera and conducted a beam test using nearly 100% linearly polarized -rays at SPring-8.