RECOIL-ION MOMENTUM SPECTROSCOPY AT THE EXPERIMENTAL STORAGE RING ESR OF GSI

H. Kollmus1, R. Moshammer1, W. Schmitt1, R. Mann2, L. Adoui3, A. Cassimi3,
C.L. Cocke4, J. Ullrich1

1University of Freiburg, 2GSI Darmstadt, 3CIRIL Caen, 4KSU Manhatten,

		Recoil-ion spectroscopy has been applied to explore inner shell
ionization of few-electron heavy ions. Measuring the transverse momentum
imparted to the recoil-ion allows to determine the impact parameter of the
reaction. A thin gas target required for such measurements and the small
cross section associated with inner shell processes of high Z-atoms dictate
a more intense beam than available with a single pass beam. Storage rings
are ideal to meet such requirements.