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Double-to-Single Target Ionization Ratio for Electron Capture in Fastp-He Collisions
2002
Physical Review Letters
Preserved Fulltext
We have used the ion storage ring CRYRING and its internal gas-jet target and recoil-ion-momentum spectrometer to measure absolute cross sections for transfer ionization (TI: p He ! H 0 He 2 e ÿ ) in 2.5-4.5 MeV p-He collisions with separate Thomas (TTI) and kinematic (KTI) TI contributions. The probability for electron emission in kinematical capture decreases with increasing velocity and appears to approach the photoionization shakeoff value (1:63%) [T. Å berg, Phys. Rev. A 2, 1726 (1970)].
doi:10.1103/physrevlett.89.163201
pmid:12398718
fatcat:l33qsje4jvautivq66obbw44ve