Double-to-single ionization ratios of helium bombarded by low-to-intermediate velocity C q+ , O q+ ( q = 1 ∼ 3) ions

We measured the double-to-single ionization ratios R of Helium bombarded by C q+ and O q+ ions ( q = 1 ∼ 3). The velocity of the projectile varies from v Bohr to 4 v Bohr, the energy varies from 25 keV/amu to 500 keV/amu. The value of R increases rapidly with the collision velocity and reaches the m...

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Bibliographic Details
Published inNuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Vol. 258; no. 2; pp. 340 - 344
Main Authors Shao, J.X., Chen, X.M., Ding, B.W., Fu, H.B., Gao, Z.M., Liu, Y.W., Du, J., Lu, Y.X., Cui, Y.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2007
Subjects
Carbon ions
Double ionization
Helium
Oxygen ions
Carbon ions
Oxygen ions
Double ionization
Helium
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Summary:We measured the double-to-single ionization ratios R of Helium bombarded by C q+ and O q+ ions ( q = 1 ∼ 3). The velocity of the projectile varies from v Bohr to 4 v Bohr, the energy varies from 25 keV/amu to 500 keV/amu. The value of R increases rapidly with the collision velocity and reaches the maximum when the velocity is about 2 or 3 v Bohr, then it decreases slowly for the higher velocity. A simple model is presented to estimate the value R varying with the collision velocity. The results calculated by the model are in agreement with the experimental data basically.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2006.10.072