Статья

Projectile-charge dependence of ejected-electron spectra

V. D. IrbyLaboratory for Atomic and Molecular Research and Physics Department, University of Missouri–Rolla, Rolla, Missouri 65401T. J. GayLaboratory for Atomic and Molecular Research and Physics Department, University of Missouri–Rolla, Rolla, Missouri 65401J.W. EdwardsLaboratory for Atomic and Molecular Research and Physics Department, University of Missouri–Rolla, Rolla, Missouri 65401Edward B. HaleLaboratory for Atomic and Molecular Research and Physics Department, University of Missouri–Rolla, Rolla, Missouri 65401M. L. McKenzieLaboratory for Atomic and Molecular Research and Physics Department, University of Missouri–Rolla, Rolla, Missouri 65401Olson ReLaboratory for Atomic and Molecular Research and Physics Department, University of Missouri–Rolla, Rolla, Missouri 65401

1988en

ABI

Аннотация

We have studied ${\mathrm{H}}^{+}$+He and $^{3}\mathrm{He}^{++}$+He ionizing collisions at intermediate energies (60 to 120 keV/amu) and have observed a significant shift in the velocity position of the maxima in forward-ejected electron spectra when changing projectiles from protons to \ensuremath{\alpha} particles. In ionizing collisions, a large portion of the ejected electrons are stranded near the transitory equiforce, or saddle point, position between the target ion and receding projectile. The shift in the electron spectra maxima to smaller velocities, due to changing projectiles from protons to \ensuremath{\alpha} particles, is consistent with the shift in the saddle-point velocity when the projectile charge is increased.

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Идентификаторы

DOI: 10.1103/physreva.37.3612

Цитирования и источники

Цитирований: 3Использованных источников: 0

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