N O T I C E his report was prepared as an account of work ponsored by the United States Government. Neither the United States nor the United States Atomic Energy Commission, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights.
A study of the spallation of copper by and 190-Mev deuterons has been made. Radiochemical methods have been employed to determine absolute cross sections for the production of a number of nuclides produced by the interaction of these high-energy particles with copper.
The fission yields of a number of nuclides produced in proton-induced fission of Th 232 were determined at several proton energies in the range of 6.7 Mev to 21.1 Mev. At the same time, the relative cross sections of the (p,n) and (p,3n) reactions on Th 232 were also determined. It was found that, although the fission reaction was predominant at proton energies greater than 8 Mev, competition from the (p,xn) type of reaction was considerable over all energies investigated.The trough in the fission yield curve becomes shallower with increasing proton energy and this change was quantitatively determined over the energy range investigated. A model is proposed to explain the change in shape of the fission yield curves.An approximate determination of the excitation function for the (p,f) reaction was made; the shape of the resulting curve was at least qualitatively in agreement with the excitation function predicted from existing theory.
Prepi-dfaUS.AKXTK&wtgyCon*feswiiixterconSBCfMaW-740S-BTg-48 V LAWRENCE UVERMORE LABORATORY Univer&tyofCalfkXTiiaAJvennoff} |' , ~ ? * NOTICE '•• " rtiis report was prepared as aft account of work sponsored by the United Sislcs Government/ Neither the United Stoics nor the United Slates Atomic Eisertf Cetnmstsion,starany of their t, emp!oyces,naranyoflhelrc*>r*lractofs(siibtx>f«rrac1ors^trielr 0 employees, makes any warraitty, express of Imptied^or assumes any legal tiabllilyorTespoi.siblh'ty for the accuracy, completeness or usefulness of any information, apparatus, product or process disclosed, or represents that its use tarjukt not infringe privateiyowned rights." ,,? " 0 ' e ' '. < Printed in the United States of America " '•' .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.