注入低能重离子在模拟细胞中的能量沉积

Energy deposition of low-energy heavy ions in the cell model

用ＭｏｎｔｅＣａｒｌｏ法模拟计算了３０ｋｅＶ和２００ｋｅＶ的Ｎ＋与１１０ｋｅＶ的Ｆｅ＋在模拟细胞中本身及级联离子非弹性散射产生的电子、分子振动的能量沉积；讨论了电子、分子振动的总能量沉积的深度分布。从计算结果看，能量主要集中分布在样品的浅层，能量沉积值非常大。在将注入量为１０１５／ｃｍ２的３０ｋｅＶＮ＋注入生物材料时，定性讨论了生物材料的局部温度。

The energy-distributions of ions of 30 and 200 keV N+ and 110 keV Fe+ ions through cell models have been calculated with the Monte Carlo method. Energy depositions produced by both electrons and molecular vibration were also discussed.The calculations show that the thermal energy deposition is concentrated in a thin layer, for the implantation of 30 keV N+ ions with a dose of 1× 1015/cm2, an energy density of up to 2.55 ×105J/cm3 can be reached within a depth of less than 200nm.