Positronium formation in polyethylene: a computer simulation study
- 作者：Garcí ; a ; A. Alba ; Siebbeles ; L.D.A. ; Schut ; H. ; van Veen ; A. ; Pimblott ; Simon M.
- 关键词：Positronium formation ; Polyethylene ; Track structure ; Monte Carlo simulation
- 刊名：Radiation Physics and Chemistry
- 出版年：2003
- 期刊代码：68_0969806x
- 类别：ph
- 出版时间：October - November, 2003
- 卷：68
- 期：3-4
- 页码：623-625
- 文件大小：108 K
摘要
Positronium formation in low-density polyethylene was studied using computer simulation and by 1-detector Doppler broadening measurement. The experimental Ps fraction is 35%, and is reproduced by simulation if the positron thermalization distance is 150nm. Additional simulations were performed to investigate the effect of the mobilities of the positron-induced charged species, and of the electron and positron thermalization distances, on Ps formation.