Vibrational excitation cross-section by positron impact: a wave-packet dynamics study
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Universidade Federal de Minas Gerais
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Artigo de periódico
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Resumo
The vibrational excitation cross-section of a diatomic molecule by positron impact is
obtained using wave-packet propagation techniques. The dynamics study was carried on a two-
dimensional potential energy surface, which couples a hydrogenlike harmonic oscillator to a positron
via a spherically symmetric correlation polarization potential. The cross-section for the excitation of
the first vibrational mode is in good agreement with previous reports. Our model suggests that a
positron couples to the target vibration by responding instantly to an interaction potential, which
depends on the target vibrational coordinate.
Abstract
Assunto
Positrons
Palavras-chave
Positron scattering, Vibrational cross-section, Wave-packet dynamics, Positron, Model potential, Wave-packet propagation
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https://www.mdpi.com/2218-2004/9/3/64