radioactive ray
3.γ-RAY SPECTROMETRIC MEASUREMENTS ON THE NINGBO IRON METEORITE FOR ITS RADIOACTIVE SPECIES PRODUCED BY COSMIC RAY
4.The experimental study of accelerated aging of BESⅢ drift chamber prototype with radioactive source 55Fe 5.9 keV X-ray (1.85GBq) was done.
5.The detectors are composed of YAP:Ce, CeF_3 and PbWO_4 with PMT which has large line current. In the experiments on ()~(60)Co and ()~(137)Cs radioactive sources we have measured the γ-ray sensitivities of the detectors.
6.Among the 22 cases examined with X-ray and CT in chest,54%whose lesions were located in both uppre lobes,14 were with clear cut border and 8 with vague border(2 radioactive burr,3 dlviding lobe and 2 air-bron -chial sign).
