Photodetachment microscopy of |
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Authors: | C Blondel C Delsart F Dulieu C Valli |
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Institution: | (1) Laboratoire Aimé-Cotton, Centre national de la recherche scientifique, batiment 505, 91405 Orsay Cedex, France, FR |
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Abstract: | Photodetachment of ions is performed in the presence of a static electric field. A high spatial resolution electron detector is used to map
out the ejected electron's wave function. Propagation over half a metre does not alter the stationary structure the electron
wave possesses in the direction orthogonal to the detachment motion. Nodes and antinodes of electron current density are observed,
that can be interpreted as direct imaging of the internal atomic wave function. Because detachment of a negative ion can be
represented accurately in the free-electron approximation, the obtained images can also be viewed as direct experimental representations
of the Green function of the uniform acceleration problem. Agreement of the measured distributions with the exact expression
of this wave-function appears quite satisfactory.
Received: 5 June 1998 / Accepted: 16 October 1998 |
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Keywords: | PACS 32 80 Gc Photodetachment of atomic negative ions - 03 75 -b Matter waves - 07 78 +s Electron positron and ion microscopes electron diffractometers and related techniques |
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