An intrinsic sensor(diameter 16 mm,thickness 300 μm) based on chemical vapor deposition derived polycrystalline diamond was developed.Ultra low dark current under 100 pA and high n/discrimination of 15.8 were obtained on this device,which enable it to be used for neutron detection in multi-radiation field.Moreover,the neutron sensitivity of this detector was characterized theoretically and experimentally.And for fast and ultra-fast neutron,the detection sensitivity is in the magnitude of 10 17 to 10 16 C cm 2 /n with good stability and negligible pump effect.All these results indicate that the as-prepared sensor to be ideal for fast and ultra-fast neutron monitoring,and it may pave the way to build neutron detector with low cost and large sensitive area with diamond.
LIU LinYueOUYANG XiaoPingZHANG ZhongBingZHANG JianFuZHANG XianPengZHONG YunHongWANG Wei
