Abstract
The δ-electron emission probability d3P(b, Ee, Φe, qf)/dEedΦedqf as a function of the electron energy Ee, impact parameter b, and projectile final charge state qf has been measured for 0.53 MeV/u F8+ + Ne at an electron emission angle Φe = 0° and d2P(b, Ee, Φe)/dEedΦe for 0.25 MeV/u He2+ + Ne at Φe = 90°, and are compared to previous results for 0.53 MeV/u F8+ + Ne at an electron emission angle Φe = 90°. For both collision systems at Φe = 90° a minimum in the emission probability d2P towards small b has been found and both shapes of the b-dependence appear quite similar, whereas for F on Ne a dramatic change in the relative b dependence of the probability d2 P between Φe = 90° and Φe = 0° has been observed. All measured dependences can be explained qualitatively in the framework of strong collisionally oriented Ne-L substrates.
Published Version
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