Complete Breakup of the Helium Atom by Proton and Antiproton Impact

Journal Article · Fri Nov 20 04:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.213201· OSTI ID:21370853

Xiaoxu, Guan; Bartschat, Klaus ^[1]

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1. Department of Physics and Astronomy, Drake University, Des Moines, Iowa 50311 (United States)

We present a fully ab initio, nonperturbative, time-dependent approach to describe single and double ionization of helium by proton and antiproton impact. The problem is discretized by a flexible finite-element discrete-variable representation on the radial grid. Good agreement with the most recent experimental data for absolute angle-integrated cross sections is obtained for projectile energies between 3 keV and 6 MeV. Also, angle-differential cross sections for two-electron ejection are predicted for a proton impact energy of 6 MeV. The time evaluation of the ionization process is portrayed by displaying the electron density as a function of the projectile location.

• OSTI ID: 21370853
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
CALCULATION METHODS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON DENSITY
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
FERMIONS
FINITE ELEMENT METHOD
FLUIDS
GASES
HADRONS
HELIUM
IONIZATION
KEV RANGE
LEPTONS
MATHEMATICAL SOLUTIONS
MATTER
MEV RANGE
MEV RANGE 01-10
NONMETALS
NUCLEI
NUCLEONS
NUMERICAL SOLUTION
PROTONS
RARE GASES
TIME DEPENDENCE