Hybrid approach to calculating proton stopping power in hydrogen

Micro-Mini & Nano-Dosimetry & Innovative Technologies in Radiation Therapy

Bailey, J.J.^1 ; Kadyrov, A.S.^1 ; Abdurakhmanov, I.B.^1 ; Bray, I.^1

Curtin Institute for Computation and Department of Physics, Astronomy and Medical Radiation Sciences, Curtin University, GPO Box U1987, Perth

6845, Australia^1

关键词: Convergent close coupling methods;    First-order approximations;    Hybrid approach;    Proton fraction;    Proton-hydrogen collisions;    Rearrangement process;    Stopping power;    Two-electron process;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/777/1/012010/pdf
DOI  :  10.1088/1742-6596/777/1/012010

来源: IOP

【 摘 要 】

Proton stopping power in hydrogen is calculated using a hybrid method. A two-centre convergent close-coupling method is used for calculations involving the proton fraction of the beam, while the Born approximation is used for the hydrogen fraction. For proton-hydrogen collisions rearrangement processes are explicitly included via a two-centre expansion. Hydrogen-hydrogen collisions are calculated including one- and two-electron processes. Despite using the first-order approximation in the hydrogen-hydrogen channel, overall reasonably good agreement with experiment is seen above 100 keV.