Study of electron bremsstrahlung in strong Coulomb fields at the ESR storage ring

Electron bremsstrahlung has been investigated for collisions of 223.2 MeV/amu He-like uranium ions with N2 and Ar gaseous targets. The doubly differential cross-sections for bremsstrahlung are compared to the predictions of relativistic first order Born calculations (Bethe-Heitler formula with Elwer...

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Bibliographic Details
Published in:Hyperfine interactions 1998-01, Vol.114 (1-4), p.165-169
Main Authors: Ludziejewski, T, Stöhlker, T, Keller, S, Beyer, H, Bosch, F, Brinzanescu, O, Kozhuharov, C, Krämer, A, Liesen, D, Mokler PH, Pratt, R H, Rymuza, P, Shaffer, C D, Stachura, Z, Świat, P, Warczak, A
Format: Article
Language:English
Subjects:
Bethe-Heitler formula
Bremsstrahlung
Coulomb potential
Mathematical analysis
Projectiles
Storage rings (particle accelerators)
Uranium
Wave functions
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Summary:Electron bremsstrahlung has been investigated for collisions of 223.2 MeV/amu He-like uranium ions with N2 and Ar gaseous targets. The doubly differential cross-sections for bremsstrahlung are compared to the predictions of relativistic first order Born calculations (Bethe-Heitler formula with Elwert correction factor) and to the calculations based on the exact wavefunctions for electrons moving in the external point-Coulomb potential of the projectile. Whereas the “exact” IPA calculations give an improved agreement with experimental data, as compared to the Bethe-Heitler theory, in particular at the end-point region of the bremsstrahlung spectra, discrepancies still remain at lower photon energies.
ISSN:0304-3843
1572-9540
DOI:10.1023/A:1012626606276