  The first domestic inorganic scintillator CLYC was grown in Beijing Glass
Research Instituteusing the vertical Bridgman method. In this work, we
evaluated the performance of this new CLYC crystal in terms of gamma-ray energy
resolution and pulse shape discrimination(PSD)capability between neutrons and
gamma-rays. The decay times occurred throughdifferent scintillation mechanisms
were achievedby fitting decay functions to the neutron and gamma-ray waveform
structures. We found an energy resolution of 4.5% for 662-keV gamma-rays and
efficient neutron/gamma PSD withFoM 2.6. Under gamma-ray excitation, there is
ultrafast scintillation mechanism in CLYC, with a decay time about 2
ns,whereasthere is no evidence of ultrafast decay under thermal neutron
excitation. This work contributes to promote domestic development of CLYC.
