High-quality PWO Crystals for the PANDA-EMC

The paper provides a status report on the crystal production and quality control of a major part of the PbWO(4) crystals for the PANDA-EMC. The results confirm the excellent performance of the new generation of PWO-II. The mechanism of stimulated recovery provides an additional tool to recover radiation damage at room and low temperatures by applying an external infrared light source. Even on-line recovery can be considered if the photo sensor is insensitive in that particular wavelength region.