標題: Accurate calculation of collision integrals using adaptive methods
作者: Gau, YT
Guo, SF
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: scattering angle;time integral;electronic energy loss;adaptive Simpson quadrature;adaptive RKF algorithm
公開日期: 1-二月-1997
摘要: In this work, we have developed accurate and efficient methods for calculating the scattering angle, time integral and electronic energy loss for binary collisions in matter. In contrast to the conventional integration and the hard sphere approximations, our new time integral is obtained by calculating the difference between the distance to the target atom and the ion path length. To compute the scattering angle and time integral accurately and efficiently, an adaptive Simpson quadrature using a smoother integrand is adopted. The energy loss arising from the local electron-concentration-dependent electronic stopping power is obtained by tracing the ion trajectory. To reduce the computation time, a second-order differential equation for the ion motion using an adaptive Runge-Kutta-Fehlberg algorithm is developed.
URI: http://hdl.handle.net/11536/762
ISSN: 0021-4922
期刊: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 36
Issue: 2
起始頁: 943
結束頁: 947
顯示於類別:期刊論文


文件中的檔案:

  1. A1997WN16000065.pdf