New source of MeV negative ion and neutral atom beams.
Rev Sci Instrum
; 87(2): 02B134, 2016 Feb.
Article
em En
| MEDLINE
| ID: mdl-26932016
The scenario of "electron-capture and -loss" was recently proposed for the formation of negative ion and neutral atom beams with MeV kinetic energies. However, it does not explain why the formation of negative ions in a liquid spray is much more efficient than with an isolated atom. The role of atomic excited states in the charge-exchange processes is considered, and it is shown that it cannot account for the observed phenomena. The processes are more complex than the single electron-capture and -loss approach. It is suggested that the shell effects in the electronic structure of the projectile ion and/or target atoms may influence the capture/loss probabilities.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2016
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Article