During the past year, our research program has involved continuing analysis of Fermilab E-735, search for quark-gluon plasma (QGP) in {bar p}-p collisions; continuing study of target fragments produced in the interaction of copper with intermediate-energy heavy ions; an exclusive study of multifragmentation using reverse kinematics at the Bevalac; and detector development for the STAR detector at RHIC.
A number of nuclear reaction studies are in progress. Measurements of the energy dependence of recoil properties of 131Ce, 131La, and 131Ba formed in the interaction of 238U with 0.8-400 GeV protons are described. Preliminary results on the angular distribution and differential ranges of Sc and Ba nuclides formed in the interaction of 238U with 0.8, 3.0, and 11.5 GeV protons are given. Preliminary angular distribution measurements of products formed in the interaction of 238U with 400 GeV protons are described. A comparative study of the interaction of silver with 25.2 GeV 12C ions and high energy protons is described and results of the analysis of the proton data are presented. The formation of 24Na in the interaction of gold with protons and .pi. was studied and preliminary results are reported. A list of publications is included. (JFP).
The following studies, currently in progress, are discussed: angular distributions and differential ranges of Sc and Ba fragments emitted in the interaction of 0.8-400 GeV protons with 238U; comparative study of the emission of light (24Na-52Mn) fragments in the interaction of Cu - U with relativistic 12C ions and protons; comparative study of the recoil properties of products of the spallation of silver by relativistic 12C ions and protons; measurement of the excitation functions of the 127I(.pi./sup + -/, .pi./sup + -/xn) reactions; energy spectra of isotopically resolved fragments emitted in the interaction of high-energy protons with complex nuclei. 9 references.
The physical research program consists of fundamental theoretical and experimental investigations designed to support the objectives of ERDA. The program is directed toward discovery of natural laws and new knowledge, and to improved understanding of the physical sciences as related to the development, use, and control of energy. The ultimate goal is to develop a scientific underlay for the overall ERDA effort and the fundamental principles of natural phenomena so that these phenomena may be understood and new principles, formulated. The physical research program is organized into four functional subprograms, high-energy physics, nuclear sciences, materials sciences, and molecular sciences. Approximately four-fifths of the total physical research program costs are associated with research conducted in ERDA-owned, contractor-operated federally funded research and development centers. A little less than one-fifth of the costs are associated with the support of research conducted in other laboratories.
