Phys. Rev. Lett. 74, 3588–3591 (1995)Observation of Postcollision Effects in the Scattered Projectile Spectra for Ionizing Proton-Helium CollisionsReceived 28 July 1994; published in the issue dated 1 May 1995 We have measured and calculated doubly differential single ionization cross sections as a function of the scattering angle and the projectile energy loss for 50 to 150 keV proton-helium collisions. These cross sections show unexpected structures as a function of both the energy loss and the scattering angle, which are interpreted as due to the postcollision interaction. Although the effects of postcollision interactions have previously been observed in electron spectra, this is the first observation of such effects for the scattered protons. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.3588
DOI:
10.1103/PhysRevLett.74.3588
PACS:
34.50.Bw, 34.50.Fa
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