反冲核碘在不同材料表面收集效率的比较

COMPARISON OF THE COLLECTING EFFICIENCY AT THE SURFACES OF DIFFERENT MATERIALS FOR THE RECOILS OF IODINE

摘要: 在缺中子同位素~(117-119)I的生成中,用氦喷咀传输技术对反冲核碘在不同材料表面的喷附效果作了比较,发现了明显的差异。实验结果表明,对于单纯依赖于物理作用的吸附,收集效率随收集材料比表面的增大而增加2-3倍;而对于能起化学作用的表面的喷附结果,收集效率有明显提高(3-10倍)。

Abstract: The collecting efficiency at the surfaces of different materials for the neutron deficient iodine isotopes produced by bombarding natural Ag with a beam of 12C at 67. 4MeV has been investigated.By increasing the roughness of surface and changing the chemical properties of the surface, the collecting efficiency has been found to be increased by a factor of 2 - 3 and 3 -10,respectively.