Ionization of Atomic Hydrogen and Helium by Low Energy Antiprotons
Lead Research Organisation:
Queen's University Belfast
Department Name: Sch of Mathematics and Physics
Abstract
Experimental studies of collision processes, in which fundamental charged particles ionize simple atoms and molecules, provide the data necessary for our understanding of the many-body interaction and the development a theoretical description of this fundamental yet unsolved problem in collision dynamics. The ionization process plays an important role in astrophysical and technological plasmas and in the dissociation of molecules in the Earth's atmosphere. A comparison of single and multiple ionization of simple atomic and molecular targets by equi-velocity protons, electrons and their corresponding antiproton and positron antiparticles makes it possible to determine the effects of projectile mass and charge.The separation of 'pure' ionization from electron capture or transfer ionization processes can be studied in the special case of antiprotons colliding with light atoms. The absence of electron transfer is a significant simplification and the mass of the projectile enables straight-line trajectories models to be used.
Publications
Knudsen H
(2008)
Ionization of helium and argon by very slow antiproton impact.
in Physical review letters
Knudsen H
(2009)
On the double ionization of helium by very slow antiproton impact
in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Description | Univ of Swansea |
Organisation | Swansea University |
Country | United Kingdom |
Sector | Academic/University |
PI Contribution | We worked together with Professor Charlton at CERN on the experimental project on antiproton collisions. |
Collaborator Contribution | Professor Charlton made a positive contribution to both the operation of the experiment and the discussions of the physics involved |
Impact | Deatils of all publications have been listed. |
Start Year | 2006 |
Description | University of Arhus |
Organisation | Aarhus University |
Country | Denmark |
Sector | Academic/University |
Start Year | 2007 |
Description | University of Tokyo |
Organisation | University of Tokyo |
Country | Japan |
Sector | Academic/University |
Start Year | 2007 |