Imaging of Saddle Point Electron Emission in Slow <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi mathvariant="italic">p</mi><mo>−</mo><mi mathvariant="normal">H</mi><mi mathvariant="normal">e</mi></math></span> Collisions

R. Dörner; H. Khemliche; M. H. Prior; C. L. Cocke; J. A. Gary; R. E. Olson; V. Mergel; J. Ullrich; H. Schmidt-Böcking

doi:10.1103/PhysRevLett.77.4520

Imaging of Saddle Point Electron Emission in Slow $p - H e$ Collisions

R. Dörner, H. Khemliche, M. H. Prior, C. L. Cocke, J. A. Gary, R. E. Olson, V. Mergel, J. Ullrich, and H. Schmidt-Böcking

Phys. Rev. Lett. 77, 4520 – Published 25 November 1996

Abstract

The two-dimensional velocity distribution of electrons emitted in 5–15 keV $p - H e$ collisions has been measured for completely determined motion of the nuclei, that is, as a function of the impact parameter and in a well defined scattering plane. The electrons are emitted preferentially in the scattering plane and in the forward direction. The velocity distributions show sharp structures that vary strongly with impact parameter and projectile velocity. The results are compared to classical trajectory calculations.

Received 6 May 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.4520

Authors & Affiliations

R. Dörner^1,2, H. Khemliche³, M. H. Prior³, C. L. Cocke², J. A. Gary⁴, R. E. Olson⁴, V. Mergel¹, J. Ullrich⁵, and H. Schmidt-Böcking¹

¹Institut für Kernphysik, Universität Frankfurt, August Euler Strasse 6, D60486 Frankfurt, Germany
²Department of Physics, Kansas State University, Manhattan, Kansas 66506
³LBNL, Berkeley, California 94720
⁴University of Missouri, Rolla, Missouri 65401
⁵Gesellschaft für Schwerionen Forschung, D64291 Darmstadt, Germany