Nuclear surface studies with antiprotonic atom X-rays
S. Wycech, F. J. Hartmann, J. Jastrzebski, B. Klos, A. Trzcinska, T. von Egidy
Abstract
The recent and older level shifts and widths in pbar atoms are analyzed. The results are fitted by an antiproton-nucleus optical potential with two basic complex strength parameters. These parameters are related to average S and P wave scattering parameters in the subthreshold energy region. A fair consistency of the X-ray data for all Z values, stopping pbar data and the Nbar-N scattering data has been achieved. The determination of neutron density profiles at the nuclear surface is undertaken, and the determination of the neutron Rrms radii is attempted. Uncertainties due to the input data and the procedure are discussed.
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