中国物理B ›› 2001, Vol. 10 ›› Issue (2): 145-147.doi: 10.1088/1009-1963/10/2/312
郁伟中1, 陆挺2, 周宏余2, 朱光华2, 汪新福2, 王超2
Lu Ting (陆挺)abc, Yu Wei-zhong (郁伟中)d, Zhou Hong-yu (周宏余)abc, Zhu Guang-hua (朱光华)abc, Wang Xin-fu (汪新福)abc, Wang Chao (王超)abc
摘要: The organic materials of biological samples, such as lima bean and peanut, were implanted respectively by nitrogen ions with an energy of 100 keV and vanadium ions with an energy of 200 keV. The positron annihilation lifetime spectra of implanted and non-implanted samples were compared with each other especially in τ3 and I3. The experimental results showed that before implantation there were many small holes with diameters of 0.48 and 0.7 nm respectively in lima bean and peanut. After ion implantation, the size of holes would be changed because of organism cross linking and scission. The effective penetration range of implantation of ions with low energy into biological samples is about 200μm.
中图分类号: (Electron and positron radiation effects)