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Penning detachment from atomic clusters
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DOI：10.1063/1.480238.png)
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Abstract
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Theoretical cross-sections are presented for Penning detachment of negatively-charged sodium clusters, receiving their detachment energy from Na*(3p(0),P-2). Two clusters are examined: Na-7(-) and Na-19(-). Classical trajectories describe the relative motion of the colliding species. Kohn-Sham density functional theory in local approximation, with exchange, correlation, and self-interaction corrections, and a spherical jellium potential, describe the electrons involved in the transition. In the range of collision energies from 0.1 to 10 eV/amu, the cross-sections for Penning detachment are approximately 10(-13) cm(2). This implies that Penning detachment may be an effective means to prepare neutral clusters from size-selected negative-ion clusters in the laboratory. (C) 1999 American Institute of Physics. [S0021-9606(99)01043-0].
Keywords:
MANY-ELECTRON SYSTEMS
SIMPLE METAL-CLUSTERS
OPTICAL-PROPERTIES
COLLISIONS
IONIZATION
EXCHANGE
PHYSICS
MODELS
IONS
LI
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