Background: To measure gamma ray in pulsed radiant hybrid field of gamma ray and neutron

the detector system is required to have a very fast time response

and a good r/n discrimination. Purpose: The aim is to do experimental study on the detector of Cherenkov plumbic-glass fiber matrix sensitive to gamma ray. Methods: Based on the Cherenkov radiant theory

simulation calculation of energy deposition of the gamma

neutron in fiber arrays materials was done by using MCNP. According to the calculation data

plumbic-glass was selected as Cherenkov scintillated optical fiber

combining with the material of gathering and transmitting scintillated light

the photomultiplier (PMT)

we designed detector of Cherenkov plumbic-glass fiber matrix sensitive to gamma ray. And then the 14.1-MeV neutron sensitivity experiments are performed on the Cockcroft-Walton generator in China Institute of Atomic Energy

the 1.25-MeV gamma sensitivity experiments on 60Co source in Northwest Institute of Nuclear Technology. Results: The experimental r/n discrimination is about 42.3 at incident angle of 45°

which is accord basically with the result of simulation calculation. Conclusion: The detector system has high r/n discrimination

which can fulfill the requirements for gamma ray measurement in pulsed radiation hybrid field. Abstract