Double ionization of helium by particle impact

Details Double ionization of helium by particle impact Double ionization of helium by particle impact

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3058..131j&link_type=abstract

In NASA, Goddard Space Flight Center, Annihilation in Gases and Galaxies, NASA CP-3058 p 131-136 (SEE N90-18957 11-70)

Physics

Atomic Physics

Helium, Ionization Cross Sections, Positrons, Proton Impact, Antiprotons, Atomic Physics, Electron Impact, Gas Ionization, Particle Collisions

Scientific paper

Experimental results are reviewed of the ratio, R sq., of double to single ionization of He by proton, antiproton, electron and positron impact in the energy range from 0.15 to about 10 MeV/amu. At high velocities (greater than 1 to 2 MeV/amu) values of R sq. caused by electron impact merge with those for the proton with the antiproton, electron values being up to a factor of 2 greater than that for the p, positron. At these velocities the single ionization cross sections caused by impact of any of these four particles are indistinguishable.

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