Results from I(, +elastic and inelastic scattering from ' C and Ca are reported. The data were all taken at an incident momentum of 800 MeV/c over an angular range from 2' to 38'. The elastic data are compared to first-order optical model calculations in coordinate and momentum space; good qualitative agreement is obtained. The inelastic data (from ' C only) are compared to distorted-wave Born approximation calculations, and good agreement is found if "realistic" inelastic transition densities are used. Although a first-order optical potential description does not describe the data fully, there are strong indications of the increased penetrability of K+ over E in this energy range. NUCLEAR REACTIONS ' C(E -E )' C Ca(-E , IC )Ca, F--=442 MeV (800 MeV/c), measured o. (I9) for elastic and inelastic scattering, compared to optical model and DWBA calculations, deduced optical potential parameters; 8=2' -38', 68= 1'.
A 8 O, excited by 800-MeV/c kaons in the (K" 9 n~) reaction, have been observed at the Brookhaven alternating-gradient synchrotron. Data were recorded for scattering angles from 0° to 25°, corresponding to momentum transfers from 50 to 330 MeV/c. The levels are interpreted in terms of a A hyperon coupled to a strangeness-zero nuclear core. The results provide insights into the properties of the A-nucleon and A-nucleus interactions.
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