| Issue |
Europhys. Lett.
Volume 59, Number 5, September 2002
|
|
|---|---|---|
| Page(s) | 674 - 680 | |
| Section | Atomic and molecular physics | |
| DOI | https://doi.org/10.1209/epl/i2002-00178-y | |
| Published online | 01 September 2002 | |
Threshold efficiency of vibrational excitation of methane by electron/positron impact: A comparison
Dipartimento di Chimica and INFM, Università di Roma “La Sapienza"
Città Universitaria, Piazzale A. Moro 5, 00185 Roma, Italy
Corresponding author: fa.gianturco@caspur.it
Received:
2
May
2002
Accepted:
7
June
2002
Threshold vibrational excitation processes of gaseous methane molecules by collision with very low-energy electrons and positrons as projectiles are studied via a quantum treatment of the dynamics. The exact vibrationally coupled equations derived from the total collision system are solved for the four different normal modes, determining numerically for each of them the corresponding vibrational nuclear functions. The results clearly indicate the role of asymptotic interaction terms in driving the excitations and some specific features of the inelastic processes which are related to the sign of the leptonic projectile and to the spatial symmetry of the vibrational mode being excited.
PACS: 34.50.Gb – Electron excitation and ionization of molecules; intermediate molecular states (including lifetimes, state mixing, etc.)
© EDP Sciences, 2002
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.