| 초록 |
The mechanical property of the phosphore layer is investigated by the resolution(LP/mm), positron annihilation spectroscopy, and SEM. The image plate samples containing the phosphore layer were irradiated by X-rays in hospital many times and were used for the various years. The LP/mm values of the (Ba,Sr)FBr:Eu image plate irradiated by X-rays, varied between 2.2 and 2.0 for the 4 years. The purpose of Coincidence Doppler Broadening (CDB) positron annihilation spectroscopy is to analyze defect structure. The S parameters of the samples from hospital use varied from 0.6219 to 0.6232. There was a positive relationship between time of exposure to X-rays and the S parameters. Most of the defects were indicated to have been generated by X-rays. |
