Scaling for state-selective charge exchange due to collisions of multicharged ions with hydrogen

A Jorge,J E Miraglia,M S Gravielle,Clara Illescas

doi:10.1088/1742-6596/635/2/022052

Abstract

SynopsisState-resolved charge exchange (CX) cross sections for Be4+, C6+, N7+ and O8+ projectiles colliding with atomic hydrogen are evaluated employing two different methods: the Classical Trajectory Monte Carlo (CTMC) and the eikonal impulse (EI) approximations. These cross sections are used to extend previously derived scaling laws for n−, nl−, and nlm− distributions to highly excited final levels with 4 ≤ n ≤ 9, covering energies in the range 50-2000 keV/amu. Present results are in agreement with available experimental and theoretical data for these collision systems, becoming a useful instrument for plasma research.

Highlights

Synopsis State-resolved charge exchange (CX) cross sections for Be4+, C6+, N7+ and O8+ projectiles colliding with atomic hydrogen are evaluated employing two different methods: the Classical Trajectory Monte Carlo (CTMC) and the eikonal impulse (EI) approximations
Present results are in agreement with available experimental and theoretical data for these collision systems, becoming a useful instrument for plasma research
In Eq (2) the function unlm can be considered as an universal function of the scaled transferred momentum W = (v2 + zT 2 − 1)/(2v), with zT = ZT /zP (ZT =1 for H) and v = v/zP

Summary

Introduction

∗ Departamento de Quımica, Modulo 13, Universidad Autonoma de Madrid, Cantoblanco 28049, Madrid, Spain Synopsis State-resolved charge exchange (CX) cross sections for Be4+, C6+, N7+ and O8+ projectiles colliding with atomic hydrogen are evaluated employing two different methods: the Classical Trajectory Monte Carlo (CTMC) and the eikonal impulse (EI) approximations. These cross sections are used to extend previously derived scaling laws for n−, nl−, and nlm− distributions to highly excited final levels with 4≤ n ≤ 9, covering energies in the range 50-2000 keV/amu.

Results

Conclusion