Phys. Rev. Lett. 79, 387 - 390 (1997)Intra-atomic Electron-Electron Scattering in p-He Collisions (Thomas Process) Investigated by Cold Target Recoil Ion Momentum Spectroscopy
V. Mergel1, R. Dörner1, M. Achler1, Kh. Khayyat1, S. Lencinas1, J. Euler1, O. Jagutzki1, S. Nüttgens1, M. Unverzagt1, L. Spielberger1, W. Wu2, R. Ali2, J. Ullrich3, H. Cederquist4, A. Salin5, C. J. Wood6, R. E. Olson6, Dž. Belkić4, C. L. Cocke2, and H. Schmidt-Böcking1 Received 26 February 1997 We have performed a kinematically complete experiment for the transfer ionization reaction 0.15–1.4 MeV p+He→H0+He2++e- by measuring the three-dimensional momentum vector of the He2+ ion in coincidence with the scattering angle and the plane of the H0. In the measured fourfold differential cross section we can clearly distinguish between the independent two-step process of capture plus ionization and the correlated e- e Thomas scattering. We find a vP-7.4±1 scaling for the total cross section of the e- e Thomas process. ©1997 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v79/p387 [ Abstract | Previous article | Next article | Issue 3 ] |
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