Saturation effects in electron capture and loss of C{sup 3+} and O{sup 5+} in noble gases

Journal Article · Wed May 01 04:00:00 EDT 1996 · Bulletin of the American Physical Society

OSTI ID:394281

Melo, W S ^[1]; Sant`anna, M M; Santos, A C.F.; Sigaud, G M; Montenegro, E C ^[2]; Meyerhof, W E ^[3]

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1. Universidade Federal Fluminense, Niteroi (Brazil)
2. PUC-Rio, Rio de Janeiro (Brazil)
3. Stanford Univ., CA (United States)

The authors have measured electron capture and electron loss cross sections of C{sup 3+} and O{sup 5+} ions on He, Ne, Ar, Kr and Xe in the 1.0 to 4.0 MeV energy range. For both processes the authors observed a strong saturation in the target Z dependence of the cross sections which occurs for the whole range of measured energies. In the case of electron loss, there is also a clear indication of the influence of the electronic structure of the target in the measured cross sections. This can be a signature of the role played by the e-e interaction (antiscreening) in collisions with multielectron targets as indicated by a similar behavior appearing in first-order calculations of this process. As the theoretical estimate of the n-e contribution to electron loss involves non-perturbative calculations, the relative contributions of the n-e and e-e contributions for heavy targets is not known at present.

• OSTI ID: 394281
• Report Number(s): CONF-9605105--; CNN: Grant INT-9101057
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN 0003-0503; ISSN BAPSA6
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON
CARBON IONS
ELECTRON CAPTURE
ELECTRON LOSS
HELIUM
ION-ATOM COLLISIONS
KRYPTON
MEV RANGE 01-10
NEON
OXYGEN IONS
SATURATION
XENON