Berlin 2001 – wissenschaftliches Programm
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A: Atomphysik
A 2: Ion Scattering I
A 2.5: Vortrag
Montag, 2. April 2001, 16:45–17:00, H1028
Momentum transfer in proton helium collsions: A new structure in momentum space — •Thorsten Weber1, Khaldoun Khayyat1,2, Reinhard Doerner3, Vladimir Rodriguez4, Alejandro Gonzalez5, Ottmar Jagutzki1, Lothar Schmidt1, Volker Mergel1, Alkis Mueller1, and Horst Schmidt-Boecking1 — 1Institut fuer Kernphysik Frankfurt, August-Euler-Strasse 6, 60486 Frankfurt am Main, Germany — 2Department of Physics, University of Missouri, Rolla, Missouri, USA — 3Fakultaet fuer Physik, Universitaet Freiburg, Germany — 4Departemento de Fisica, FCEN, Universidad de Buenos Aires, Buenos Aires, Argentina — 5Centro Atomico Bariloche, 8400 S C de Bariloche, Argentina
We report on the experimental observation of an abrupt rise in the longitudinal momentum distribution of recoil-ions created in proton helium collision. The details of this structure can be related to electrons travelling with the velocity of the projectile (electron capture to the continuum ECC). The longitudinal as well as the transverse distribution of the recoil-ions can be explained as a continuation of the momentum distribution from ions resulting from electron capture illustrating the smooth transition from the capture to bound states of the projectile to the ECC.