Abstract

We have measured and calculated fully differential cross sections (FDCS) for ionization of helium by 75-keV proton impact. Ejected electrons with a speed close to and above the projectile speed were investigated. This range of kinematics represents a largely unexplored regime. A high sensitivity of the FDCS to the details of the description of the few-body dynamics, reported earlier for ionization of H2, was confirmed. A peak structure was found in an electron angular range between the regions where the so-called binary and recoil peaks are usually observed. The need for nonperturbative calculations using a two-center basis set is demonstrated.

Department(s)

Physics

Comments

This work was supported by the National Science Foundation under Grants No. PHY-1703109 and No. PHY-1505819.

International Standard Serial Number (ISSN)

2469-9926

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2019 American Physical Society, All rights reserved.

Publication Date

16 Sep 2019

Included in

Physics Commons

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