IMAGING PLATE FOR gamma-RAY SENSITIVITY DESENSITIZED NEUTRON AND PARTICLE BEAM

摘要

PROBLEM TO BE SOLVED: To provide a neutron imaging plate with a lowγ-ray sensitivity. SOLUTION: A powder obtained by uniformly mixing a fluorescent powder of BaFBr:Eu2+and a boric acid (H310BO3) powder with a10B isotope composition ratio of 90% is applied on a metal substrate and sintered. Defects are thermally diffused and introduced to the surface of the fluorescent powder of BaFBr:Eu2+to obtain a surface sensitive stimulable phosphor. The inhibiting capacity of anαparticle and an7Li particle emitted when10B capatures a neutron is greater than the inhibiting capacity of an electron emitted by theγbeam functioning as a back ground is used to lower the sensitivity to theγbeam. Thus, the imaging plate with desensitizedγ-beam sensitivity is obtained. COPYRIGHT: (C)2007,JPO&INPIT