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Springer series on atomic, optical, and plasma physics

Young-Type Electron Interferences Using Single Electron Sources

F. Frémont

Published Jun 15, 2013• 0 citations
Publisher
DOI
10.1007/978-3-642-38479-0_4

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Interferences caused by a single electron impacting on an independent double-center scatterer, which plays the role of an atomic-size double-slit system, are experimentally evidenced for the first time. The electron originates from the autoionization of doubly excited 2 l n l ' (n ⩾ 2) configurations of He following a double charge exchange process by He 2+ ions impinging on H 2 molecules. Well-defined oscillations are visible in the angular distribution of the electrons emitted towards the receding H + protons. The presence of these oscillations demonstrates that a single electron interferes with itself. This is analogous to the famous "thought" experiment imagined and discussed by Feynman in 1963, in which the quantum nature of the electron was illustrated by making it traverse an atomic-size double-slit arrangement.

Journal of Physics Conference Series•Nov 1, 2007•5 citations
Evidence is given for Young-type interferences caused by a single electron acting on a given double-center scatterer analogous to an atomic-size double-slit system. The electron is provided by autoionization of a doubly excited He atom following the capture of the electrons of H2 by a He2+ incoming ion. The autoionizing projectile is a single-electron source, independent of the interferometer provided by the two H+ centers of the fully ionized H2 molecule. This experiment resembles the famous thought experiment imagined by Feynman in 1963, in which the quantum nature of the electron is illustrated from a Young-like double-slit experiment. Well-defined oscillations are visible in the angular distribution of the scattered electrons, showing that each electron interferes with itself.
Interferences caused by a single electron impacting on an independent double-center scatterer, which plays the role of an atomic-size double-slit system, are experimentally evidenced for the first time. The electron originates from the autoionization of doubly excited 2 l n l ' (n ⩾ 2) configurations of He following a double charge exchange process by He 2+ ions impinging on H 2 molecules. Well-defined oscillations are visible in the angular distribution of the electrons emitted towards the receding H + protons. The presence of these oscillations demonstrates that a single electron interferes with itself. This is analogous to the famous "thought" experiment imagined and discussed by Feynman in 1963, in which the quantum nature of the electron was illustrated by making it traverse an atomic-size double-slit arrangement.