Ultralow-Energy Electrons from Fast Heavy-Ion Helium Collisions: The “Target Cusp“

W. Schmitt, R. Moshammer, F. S.C. O’Rourke, H. Kollmus, L. Sarkadi, R. Mann, S. Hagmann, R. E. Olson, J. Ullrich

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Abstract

Doubly differential cross sections d2σ/dν have been obtained by mapping the 3-dimensional velocity space of ultralow- and low-energy electrons \(1.5 meV<=Ee<=100 eV\) emitted in singly ionizing 3.6 MeV/u Au53+ on helium collisions. A sharp \(ΔEFWHMe⊥<=22 meV\) asymmetric peak centered at = 0 is observed to emerge at ultralow energies from the strongly forward shifted low-energy electron velocity distribution. The shape of this “target cusp,” which is very sensitive on the details of the two-center potential, is in excellent accord with theoretical predictions.

Original languageEnglish
Pages (from-to)4337-4340
Number of pages4
JournalPhysical review letters
Volume81
Issue number20
DOIs
Publication statusPublished - Nov 16 1998

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Schmitt, W., Moshammer, R., O’Rourke, F. S. C., Kollmus, H., Sarkadi, L., Mann, R., Hagmann, S., Olson, R. E., & Ullrich, J. (1998). Ultralow-Energy Electrons from Fast Heavy-Ion Helium Collisions: The “Target Cusp“. Physical review letters, 81(20), 4337-4340. https://doi.org/10.1103/PhysRevLett.81.4337