Abstract

A new experimental technique, high resolution recoil-ion momentum spectroscopy (COLTRIMS), has been developed to measure the transfer of energy and momentum in various atomic collision systems with high precision. In processes of electron transfer in fast ion-atom collisions, this method has been used for the measurement of cross sections which are differential in scattering angle of microradians or nanoradians for selected electronic final states. In this report, the principle of this method is reviewed briefly and some experimental results are presented for state-selective differential cross sections of one-electron capture from He atoms by highly-charged ions at MeV/u collision energies.

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