Charge-changing cross sections of fast H-0,H-1+ and He-0,He-1+,He-2+ projectiles in C-60
Charge-changing cross sections of fast H-0,H-1+ and He-0,He-1+,He-2+ projectiles in C-60
复制标题
C-60中快速H-0、H-1和He-0、He-1、He-2弹丸的电荷变化截面
DOI：
10.1103/physreva.72.052718
复制
发表时间：
2005
影响因子：
2.9
通讯作者：
K. Ishii
中科院分区：
文献类型：
--
作者：
A. Itoh;K. Nose;Y. Hamamoto;T. Mizuno;K. Ishii
测量了0.5 MeV H0、1+和0.5 ~ 2.0 MeV He的快光抛射离子与C60碰撞时的电子捕获和损失截面。将C60粉末在靶细胞中加热至300-500℃，制备C60气体靶，并测量出电荷分数随细胞温度的变化。利用文献中两种不同的蒸汽压数据，推导出绝对横截面。对实验截面进行了检验，并与从原子靶提出的各种常规公式中得到的理论值进行了比较。此外，在经典模型的基础上，考虑C60的局域电子密度，计算了单电子和双电子捕获截面。从一组完整的实验截面中，也推导出平衡电荷分数，并发现与碳箔数据基本相同，表明没有气固差异。
Electron capture and loss cross sections have been measured for fast light projectile ions of 0.5 MeV H0,1+ and 0.5–2.0 MeV He in collisions with C60. The gaseous target of C60 was prepared by heating C60 powder in a target cell to temperatures of 300–500 °C, and outgoing charge fractions were measured as a function of the cell temperature. Absolute cross sections are deduced by using two different vapor-pressure data available in literature. Experimental cross sections are examined in comparison with theoretical values obtained from various conventional formulas proposed for atomic targets. In addition, singleand double-electron capture cross sections are also calculated on the basis of a classical model by taking account of the local electron density of C60. From a complete set of our experimental cross sections, equilibrium charge fractions are also deduced and found to be essentially the same as carbon-foil data, indicating no gas-solid difference.