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Absolute cross sections for single and multiple charge exchange in Feq+ impacting on CO, CO2 and H2O

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, , Citation R J Mawhorter et al 2009 J. Phys.: Conf. Ser. 194 102008 DOI 10.1088/1742-6596/194/10/102008

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1 Department of Physics and Astronomy, Pomona College, Claremont, CA 91711, USA

2 Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA

3 Jožef Stefan Institute, 1000 Ljubljana, Slovenia

4 Physics Department, The Queen's University, Befast BT7 INN, UK

5 Indiana Wesleyan University, Marion, IN, 46953, USA

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1742-6596/194/10/102008

Abstract

We report measured absolute single and multiple charge-exchange cross sections for Feq+ ions colliding with CO, CO2 and H2O. A retarding-field method is used in two different approaches for charge-state analysis of the ion beam after traversing the stationary target gas cell. The projectile energy is 7q keV. This corresponds to a range of ion velocities of 350 km s−1 for q = 5, to 560 km s−1 for q = 13. This is comparable to solar wind velocities for understanding charge exchange of solar wind ions with cometary neutrals, leading to X-ray emission from the ions.

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10.1088/1742-6596/194/10/102008