Photofragmentation of Deuterated Benzene*

We have measured the probability for creating various fragments of deuterated benzene (C$_{6}$H$_{3}$D$_{3}$) in the photon energy range from 12 to 160 eV at the Synchrotron Radiation Center (SRC). The fragments were detected with an improved ion time-of-flight spectrometer providing a high enough resolving power to unambiguously detect all possible photofragments of deuterated benzene. The ion fragments C$_{n}$H$_{m}$D$_{p}$ (n=2--6; m,p=0--3; note that not all combinations exist) appear in groups characterized by the number of carbon atoms. We find evidence for the existance of carbon rings with only a single hydrogen atom attched (C$_{6}$H) . We will present appearance energies and photon energy dependences of all fragments.