Working Paper Article Version 1 This version is not peer-reviewed

Vibrational Excitation Cross Section by Positron Impact. A Wavepacket Dynamics Study

Version 1 : Received: 3 September 2021 / Approved: 7 September 2021 / Online: 7 September 2021 (12:00:07 CEST)

A peer-reviewed article of this Preprint also exists.

Poveda, L.A.; Varella, M.T.N.; Mohallem, J.R. Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study. Atoms 2021, 9, 64. Poveda, L.A.; Varella, M.T.N.; Mohallem, J.R. Vibrational Excitation Cross-Section by Positron Impact: A Wave-Packet Dynamics Study. Atoms 2021, 9, 64.

Journal reference: Atoms 2021, 9, 64
DOI: 10.3390/atoms9030064

Abstract

The vibrational excitation cross section of a diatomic molecule by positron impact is obtained using wavepacket propagation techniques. The dynamics was carried on a two-dimensional potential energy surface which couples a hydrogen-like 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.

Keywords

positron; model potential; wavepacket propagation; vibrational cross section

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