PU-244 IN THE EARLY SOLAR-SYSTEM AND XENOLOGY

Isotopic compositions of the anomalous xenon components, such as the s o-called xenon-H L and the s-type xenon, can be explained in terms of a two-component model in which they are regarded as representing the i sotopic composition of a mixture of the Pu-244 fission xenon component and a trapped xenon component, whose isotopic composition resembles t hat of the atmospheric xenon, but is often markedly altered by a combi ned effect of a) mass-fractionation, b) spallation and c) neutron-capt ure reactions caused primarily by the 10 keV (stellar temperature) neu trons.