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目的 研制一种用铅制作、设计合理、防护效果好、加工制作方便的90 Mo -99mTc发生器防护铅室 ,代替长期以来沿用的铅砖砌起来的铅室。方法 以90 Mo衰变放射出来的能量为 740keVγ射线减弱 10 0倍为计算依据 ,采用铅厚为 5 0mm铅环叠加设计。结果 制作后投入使用两年 ,经实测防护效果与理论计算一致。结论 设计制作的发生器铅室具有防护效果好 ,操作方便 ,所占空间小、美观 ,搬运组装方便等优点。轮流使用 ,对用过的发生器还可以起到贮存衰变的防护作用
OBJECTIVE To develop a 90M-99mTc protection lead chamber which is made of lead, has reasonable design, good protective effect and is easy to manufacture. Instead of the long-standing lead brick, lead chamber is used. The method is based on the energy of 90 Mo decay radiated 740keV gamma ray attenuation 10 0 times, based on the lead thickness of 50mm lead ring superimposed design. The results were put into use two years after production, the measured protective effect is consistent with the theoretical calculations. Conclusion The design of the generator lead chamber has the advantages of good protective effect, convenient operation, small space, beautiful appearance, convenient handling and assembly. Used in turn, on the generator used can also play a protective role of storage decay