New source of MeV negative ion and neutral atom beams

Journal Article · Mon Feb 15 00:00:00 EST 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4935234· OSTI ID:22482954

Braenzel, J.; Schnürer, M. ^[1]; Prasad, R. ^[2]; Borghesi, M. ^[3]; Jequier, S.; Tikhonchuk, V. ^[4]

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1. Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin 12489 (Germany)
2. Institute for Laser and Plasma Physics, Heinrich Heine University, Duesseldorf 40225 (Germany)
3. School of Mathematics and Physics, The Queen’s University of Belfast, Belfast BT7-1NN (United Kingdom)
4. Centre Lasers Intenses et Applications, CEA, CNRS, University of Bordeaux, 33405 Talence (France)

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.

• OSTI ID: 22482954
• Journal Information: Review of Scientific Instruments, Vol. 87, Issue 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ANIONS
ATOMIC BEAMS
ATOMS
CHARGE EXCHANGE
ELECTRON CAPTURE
ELECTRONIC STRUCTURE
EXCITED STATES
KINETIC ENERGY
LIQUIDS
LOSSES
MEV RANGE