Article

Absolute doubly differential single-ionization cross sections in<i>p</i>+He collisions

Michael SchulzDepartment of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri–Rolla, Rolla, Missouri 65401T. VajnaiDepartment of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri–Rolla, Rolla, Missouri 65401A. D. GausDepartment of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri–Rolla, Rolla, Missouri 65401W. HtweDepartment of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri–Rolla, Rolla, Missouri 65401D. H. MadisonDepartment of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri–Rolla, Rolla, Missouri 65401R. E. OlsonDepartment of Physics and the Laboratory for Atomic and Molecular Research, University of Missouri–Rolla, Rolla, Missouri 65401

1996en

ABI

Abstract

We have measured and calculated doubly differential single-ionization cross sections for 50--150-keV p+He collisions as a function of the projectile energy loss and scattering angle. The measured cross sections were put on an absolute scale by normalizing the integrated cross sections to known total cross sections. Clear effects of the postcollision interaction (PCI) were observed in the scattered projectile spectra. Our singly differential cross sections as a function of projectile energy loss do not agree with corresponding cross sections obtained from electron spectroscopy. These discrepancies are attributed to the PCI. Our calculations including the PCI reproduce the shape of our data quite well; however, there are discrepancies in the absolute magnitude. \textcopyright{} 1996 The American Physical Society.

Identifiers

DOI: 10.1103/physreva.54.2951

Citations and references

Cited by 40 references

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