Dürr M, Dimopoulou C, Najjari B, Dorn A, Ullrich J. Three-dimensional images for electron-impact single ionization of He: complete and comprehensive (e, 2e) benchmark data.
PHYSICAL REVIEW LETTERS 2006;
96:243202. [PMID:
16907237 DOI:
10.1103/physrevlett.96.243202]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Indexed: 05/11/2023]
Abstract
Comprehensive fully differential cross sections for electron emission into all three spatial dimensions are presented for 1 keV and 102 eV electron-impact single ionization of helium using an advanced reaction microscope. Surprising out-of-plane contributions, traced back to an interference term in a perturbation expansion by comparison with ion-impact data, severely challenge theoretical models that accurately predict coplanar emission. The data represent the ultimate benchmark for recently developed exact theoretical descriptions of the most fundamental three-body quantum problems.
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