摘要
为探讨低能氮离子注入植物种子的生物物理机理,在建立细胞靶模型的基础上,采用蒙特卡罗方法,利用Matlab软件自编程序对阻止本领、能量沉积和生物效应进行了模拟研究。结果表明:在20～200keV N+注入彩棉种子,离子的深度在0～22μm之间,对于单个细胞大量离子被阻停在细胞质内较浅的区域,能量沉积也主要发生在细胞的浅层区域。在假设深度和效应相关联的基础上,得到能量、浓度与深度之间的叠加曲线非常接近剂量与效应曲线。从计算结果推测细胞的浅层区域很可能是低能离子与生物组织发生三因子效应的主要区域,能量、质量和深度等因素共同决定剂量与效应关系曲线。
In order to research the mechanism of the low energy ions implanted in plant seeds, the cell target model is established and the cross sections, energy deposition and biological effect is studied by Monte Carlo method. The results indicated that Nitrogen ions implanted into the color cotton seeds with the energy between 20-200keV,the depth of ions is 0-22/~rn. Most ions are stopped in Cytoplasm aero,and energy deposition take place in superficial aero for one cell. The superposition curve of energy, concentration and depth is close to the dose-survival effect curve on the base of hypothesis. These results reflected that the superficial aero probably is the main aero of the three factor effect,and the dose-survival effect is controlled by energy,concentration and depth.
出处
《石河子大学学报（自然科学版）》
CAS
2011年第4期521-525,共5页
Journal of Shihezi University(Natural Science)
关键词
离子注入
蒙特卡罗模拟
种子
存活剂量关系
ion implantation
Monte Carlo simulation
seeds
survival dose relation
