Double-to-Single Target Ionization Ratio for Electron Capture in Fast p-He Collisions

Details Double-to-Single Target Ionization Ratio for Electron Capture in Fast p-He Collisions Double-to-Single Target Ionization Ratio for Electron Capture in Fast p-He Collisions

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phrvl..89p3201s&link_type=abstract

Physical Review Letters, vol. 89, Issue 16, id. 163201

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22

Electronic Excitation And Ionization Of Atoms, Charge Transfer, Other Instrumentation And Techniques For Atomic And Molecular Physics

Scientific paper

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→H0+He2++e-) 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. Åberg, Phys. Rev. A 2, 1726 (1970)

]. The velocity dependence of the TTI cross section is consistent with the theoretically predicted v-11 scaling [

J. S. Briggs and K. Taulbjerg, J. Phys. B 12, 2565 (1979)

].

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