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Related Experiment Videos

Simultaneous projectile-target ionization: a novel approach to (e, 2e) experiments on ions.

H Kollmus1, R Moshammer, R E Olson

  • 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.

Physical Review Letters
|March 23, 2002
PubMed
Summary

This study demonstrates a new method for tracking ion and electron movements during collisions. It enables detailed analysis of atomic collisions, advancing electron-ion scattering research.

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Area of Science:

  • Atomic and molecular physics
  • Quantum mechanics
  • Collision physics

Background:

  • Understanding atomic collisions is crucial for fields like plasma physics and materials science.
  • Previous experiments lacked the precision to fully resolve all particles involved in ionization events.

Purpose of the Study:

  • To perform a kinematically complete experiment for simultaneous ionization of a projectile and target.
  • To demonstrate the feasibility of event-by-event separation of reaction channels in ion-atom collisions.

Main Methods:

  • A kinematically complete experiment was conducted using 3.6 MeV/u C2+ on He collisions.
  • The final vector momenta of the recoil ion (He1+), two electrons (projectile and target), and the emerging projectile (C3+) were measured in coincidence.

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Main Results:

  • The experiment successfully measured the momenta of all final-state particles.
  • Feasibility of separating various reaction channels, including projectile ionization by target electrons, was demonstrated.
  • Results align with six-body classical trajectory Monte Carlo calculations.

Conclusions:

  • This work establishes a method for kinematically complete electron-ion scattering experiments.
  • The findings pave the way for more detailed investigations into ionization processes in atomic collisions.