[en] Spatially separated relativistic exotic beams of all elements up to uranium can now be provided for experiments and applications. The projectile fragment separator FRS has proved as a versatile magnetic spectrometer for experiments with heavy ions in the energy range of (0.1 - 2) A - GeV. Recent studies of peripheral nuclear collisions with projectiles from oxygen up to uranium at relativistic energies with the FRS are discussed. The identification of ¹⁰⁰Sn and the observation of a proton halo in ⁸B are very recent results. Furthermore, it was discovered that projectile fission is a unique tool to search for the doubly-magic ⁷⁸Ni nucleus. With the FRS in combination with the dipole magnet ALADIN, and the neutron detector LAND light halo nuclei have been studied in kinematically complete experiments. The FRS combined with the storage and cooler ring ESR offers new precision experiments. First results on direct mass measurements with cooled Ni and Au fragments and decay studies of highly-charged nuclei have been obtained

[en] A new double sided silicon microstrip detector is being developed by CDF for use in Run II of the Fermilab Tevatron. Due to the expected increase in Tevatron luminosity, prototypes are being studied to ensure their performance in a high radiaiton environment. Other challenges include the performance and readout of the z-coordinate

[en] Time of flight hodoscopes have been constructed for the High Momentum Spectrometer (HMS) and Short Orbit Spectrometer (SOS). These spectrometers are the primary equipment for endstation C at CEBAF. The applications required good time resolution, so fast 8-stage tubes (Phillips XP2282B), fast scintillator (BC404), and relatively thin scintillator (1 cm) for high photoelectron number were employed. Although their primary purpose is to provide a clean, efficient trigger for single arm and coincidence experiments, their excellent time resolution also makes them useful for particle identification. Since July 1994 the installed arrays have been tested with scattered beams of electrons, pions, and protons over a wide range of momenta. The performance of the hodoscopes will be discussed

[en] Microstrip Gas Chambers on substrates of polyimide and silicon have been built and tested with different gases and at different rates. The pattern of electrodes have a pitch ranging between 200 and 1000 microns. The width of the cathodes has also been varied. The 50 micron thick substrates of polyimide have been glued to a printed circuit board with a pattern of pick up electrodes. The signals induced on these electrodes have also been recorded and compared to the one detected by the anodes. Results of these tests will be presented and discussed

[en] The study of the many fascinating aspects of the highly deformed nuclei at high spin has become possible with multidetector arrays such as Gammasphere that are coming on line. However, the issues of superdeformation in light systems and of hyper-deformation can best be addressed by augmenting Gammasphere with other auxilliary devices such as the Microball. The recent discovery and characterization of a new island of superdeformation in the Z∼38 and N∼44 region, and attempts to observe hyper deformation with Gammasphere in conjunction with the Microball, a 4π charged particle multidetector array, will be reviewed. For light compound systems (A≤120) the Microball enhances considerably the resolving power of Gammasphere using the advantages of 'total spectroscopy' which allows (a) efficient exit channel selection, thus eliminating interfering transitions, (b) dramatic improvement of the energy resolution from event-by-event determination of the recoil direction, which makes possible precise Doppler shift corrections, and (c) selection of cascades originating from high spin states by gating on excitation energy and thus suppressing competing low spin γ cascades. Recent experiments to study the continuum and the discrete line structure of hyper-deformed nuclei (major to minor axis ratio 3:1) will be discussed. These structures appear to be formed only when a proton is emitted among the evaporated particles. Possible scenarios for the role played by this proton will be discussed

[en] The authors are investigating the production mechanism for the inclusive reaction e⁺e^- → J/ψX. With about 3 fb^-1 data collected at the CLEO II detector at the Cornell Electron Storage Ring, CESR, the authors have found a yield of about 200 events. The J/ψ are extracted from the data set taken at the Υ(4S) by imposing a minimum momentum cut suppressing J/ψ mesons coming from B decays. They also used the data set taken slightly below the Υ(4S), which is free from B mesons. Various distributions were plotted and compared with a recent theoretical prediction

[en] Experience is described from two decades of experiments using beams of high energy neutrinos at Fermi National Accelerator Laboratory. This program came about through the dedicated commitment of many talented people. The results, primarily measurements of neutrino cross-sections with nucleons, had impact on present knowledge of the structure of nucleons and QCD, the properties of the weak neutral current, as well as providing constraints on new properties for the neutrino and its interactions

[en] The authors effective Lagrangian approach has demonstrated the importance of N^*(1535) excitation in eta photoproduction off nucleons. They analyze the new Mainz and Bonn data on these reactions. The Mainz data cover the photon lab energy from 715 MeV to 788 MeV. The Bonn data run from 707 MeV to 720 MeV. The authors' analysis indicates that these two data sets are incompatible with the analysis of existing data set, but are mutually compatible. The authors draw new conclusions on the helicity amplitude, A_1/2, and the parameter ξ, a product of electromagnetic and strong decay amplitudes for N^*(1535)

[en] A comparison of the relative production rate of weak vector bosons (W and Z) with and without hard QCD radiation is used with NLO QCD calculations to extract the strong coupling constant α_s. The data sample consists of W and Z boson events detected via the electron decay channel in the D0 detector

[en] The authors measure the bottom (b) and charm (c) content in an inclusive jet sample collected from the 1992-93 run at the Collider Detector at Fermilab (CDF) in p bar p collisions at √s=1.8 TeV. They have used the Silicon Vertex Detector (SVX) with a 2-dimensional secondary-vertex finding algorithm to identify a sample of jets with displaced vertices. By fitting the observed lifetime distribution in data to the expected distributions from bottom, charm, and non-heavy flavor jets, they can measure a bottom and charm component per jet. The authors present preliminary numbers on the bottom and charm fraction per jet, and the bottom and charm cross-sections