Evidence for Two-Centre Effects in the Electron Emission from 25 MeV/u Mo <sup>40+</sup> + He Collisions: Theory and Experiment
N. StolterfohtD. SchneiderJ. A. TanisHahn-Meitner-Institut Berlin, Glienickerstr. 100, D-1000 Berlin 39, GermanyH. AltevogtA. SalinLaboratoire des Collisions Atomiques, Université de Bordeaux I, 33405 Talence, FranceP D FainsteinCentro Atómico Bariloche and Instituto Balseiro - 8400 Bariloche, ArgentinaR D RivarolaUniversidad Nacional de Rosario, Instituto de Física - 2000 Rosario, ArgentinaJ. P. GrandinCentre Interdisciplinaire de Recherche avec les Ions Lourds - 14040 Caen, FranceJ. N. ScheurerCentre d'Etudes Nucleaires de Bordeaux-Gradignan, IN2P3 - 33170 Gradignan, FranceS. AndriamonjeCentre d'Etudes Nucleaires de Bordeaux-Gradignan, IN2P3 - 33170 Gradignan, FranceD. BertaultCentre d'Etudes Nucleaires de Bordeaux-Gradignan, IN2P3 - 33170 Gradignan, FranceJ. F. CheminCentre d'Etudes Nucleaires de Bordeaux-Gradignan, IN2P3 - 33170 Gradignan, France
1987en
ABI
Аннотация
Absolute doubly differential cross-sections for electron emission in 25 MeV/u Mo40+ + He collisions were measured as a function of the electron energy and emission angle. The data show enhancement at forward angles and reduction at backward angles with respect to results derived using the Born approximation. Comparison with a continuum distorted-wave approximation suggests that this observation can be explained by the combined influence of the projectile and target Coulomb fields on the ejected electron. This two-centre effect is found to be particularly important for electron emission at backward angles.
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