EXCITATION AND NEUTRON DECAY OF XENON STUDIED BY FORWARD-ANGLE SCATTERING OF HIGH-ENERGY O-17 IONS

摘要

Excitation energy spectra and neutron decay of xenon have been measured in extreme forward angle scattering of 250A and 400A MeV O-17 ions, using one quadrant of the CELSIUS storage ring as a magnetic spectrometer, The observed excitation energy spectrum, ranging from 12 to 36 MeV, has been compared with Coulomb cross section calculations. Neutron and missing energy spectra are compared with statistical decay calculations using the code CASCADE. In addition to statistical decay from giant resonances and other continuum excitations, a large fraction of forward peaked fast neutrons was observed throughout the entire excitation energy region. A possible reaction mechanism behind these fast neutrons is discussed. (C) 1997 Elsevier Science B.V. [References: 34]