The indirect evidence for the production of a heavy lepton and direct evidence for the product of a new hadronic state or states in proton-proton interactions is considered for the interpretation requiring the existence of two more leptons and two new quarks. It is shown that such a picture is consistent and in good agreement with existing data. The new structure is located at M = 9.54 GeV/c/sup 2/ and is much wider than the experimental resolution. Also it is asymmetric, suggesting the presence of several resonances. 7 references. (JFP)

In designs for high gain targets for laser driven inertial confinement fusion, the deuterium-tritium fuel is at cryogenic temperatures. We are adapting cryogenic target fabrication techniques to the high power Shiva Laser Facility. The complex but compact cryogenic system which meets the Shiva laser requirements is described.

None

The structural distortion in PrCu/sub 2/ below the Jahn-Teller transition at T/sub D/ = 7.3 K was measured by neutron diffraction. The primary order parameter was found to be the e/sub zx/ strain of the orthorhombic unit cell. The coupling of this strain to the lowest two crystal field levels gave rise to the dominant quadrupole interaction between the Pr/sup +3/ ions. A dipole transition to the second excited crystal field level was also observed. The dispersion of this excitation shows that the exchange interaction is antiferromagnetic, consistent with the enhanced antiferromagnetic nuclear ordering reported below 52 mK.

None