[en] Data were taken in the FNAL 30-inch bubble chamber with a tagged beam. Beam track identification and flux calculations were performed in such a way that the Glauber screening formula for inelastic collisions could be tested. The formula was found to describe the observations adequately. The spectator model of deuterium interactions was employed in the derivation of neutron target and proton target multiplicity distributions. Momentum and angular distributions of observed backwards spectator protons were used to confirm the validity of this model. The probability of a rescatter involving the spectator nucleon was found to be .19 +- .03 for both anti pd and π^-d interactions. A model allowing the production of either zero or one pair of charged particles in rescattering events was shown to provide a satisfactory description of the data. Available pn cross sections were used in conjunction with the anti pn cross sections to study anti pn annihilation. The variation of the moments of the multiplicity distributions with available energy was found to be dependent upon the identities of the particles involved. Neutral strange particles were studied through their V-zero decay modes. Measured proton target cross sections for inclusive production of strange particles are consistent with measurements made in hydrogen experiments. Distributions in rapidity and transverse momentum are presented and compared with the results of a anti pp experiment at the same beam momentum. The possible observation of systemtic differences in these distributions for strange particles produced in pion and antiproton beam, and neutron and proton target collisions is discussed

[en] We observe a narrow enhancement in phiK⁺K^- and phiπ⁺π^- final states, with a mass of 2.141 +- 0.012 +- 0.010 GeV/c² and width of 0.049 +- 0.028 GeV/c². The relative branching ratio is B(M→phiK⁺K^-)/B(M→phiπ⁺π^- ) = 0.49 +- 0.16, inconsistent with M being a qq-bar state

[en] Baryon production and subsequent decay into K/sub s/⁰Λ⁰, Λ⁰π^+-, K/sub s/⁰Λ⁰π^+-, and Λ⁰π⁺π^- final states is studied. Evidence for the states N(1710), Σ(1385), Σ(1620), Σ(1690), Σ(2250), Ψ(1320), Ψ(1530), Ψ(1820), and Ψ(1940) is presented. Ratios of x/sub f/ distributions and cross sections are compared to the predictions of phenomenological models

[en] We present a new method of using Avalanche Photo Diodes (APDS) for low level light detection in Geiger mode in high rate situations such as those encountered at the Superconducting Super Collider (SSC). The new technique is readily adaptable to implementation in CMOS VLSI

[en] The High-Resolution Spectrometers in Hall A at Jefferson Laboratory have been instrumented with state-of-the-art Vertical Drift Chambers designed and constructed by the Nuclear Interactions Group at MITLNS in conjunction with the Physics Division at Jefferson Lab. These chambers rely on a unique, high cell-density design made possible by the absence of field-shaping wires. Each chamber has an inherent per-plane resolution for 5-cell cosmic-ray tracks of 145 μm FWHM when operated on the bench at -4.8 kV with argon-isobutane gas, and 225 μm FWHM for 5-cell electron tracks when operated in the High-Resolution Spectrometer detector stack at -4.0 kV with argon-ethane gas. The design and construction facilitates wire placement and replacement to 50 μm, very low dark current, and no cross-talk. The detectors have been in almost continuous use since April 1996, providing reliable, high-resolution charged-particle tracking data for the Hall A physics program. A complete overview of this project is presented

[en] Two attempts have been made recently at Fermilab to use channeling in bent crystals to provide beam attenuation and deflection of 800 GeV protons. One attempt was quite successful, attenuating a high intensity beam by a factor of 2000 to provide a useful beam at an emulsion experiment. This represents the highest energy where channeling has been observed. The other attempt failed but led to useful insights on how to improve the technique. The possiblity of bent crystals as phase space monitors is discussed. (orig.)

[en] We have carried out an (e,e^'p) experiment at high momentum transfer and in parallel kinematics to measure the strength of the nuclear spectral function S(k,E) at high nucleon momenta k and large removal energies E. This strength is related to the presence of short-range and tensor correlations, and was known hitherto only indirectly and with considerable uncertainty from the lack of strength in the independent-particle region. This experiment locates by direct measurement the correlated strength predicted by theory

[en] We studied the reaction ¹²C(e,e^'p) in quasielastic kinematics at momentum transfers between 0.6 and 1.8 (GeV/c)² covering the single-particle region. From this the nuclear transparency factors are extracted using two methods. The results are compared to theoretical predictions obtained using a generalization of Glauber theory described in this paper. Furthermore, the momentum distribution in the region of the 1s-state up to momenta of 300 MeV/c is obtained from the data and compared to the correlated basis function theory and the independent-particle shell model

[en] We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The measurements were made at 28 distinct kinematic settings covering a range in momentum transfer of 0.4< Q²<5.5 (GeV/c)². These measurements represent a significant contribution to the world's cross section data set in the Q² range, where a large discrepancy currently exists between the ratio of electric to magnetic proton form factors extracted from previous cross section measurements and that recently measured via polarization transfer in Hall A at Jefferson Lab. This data set shows good agreement with previous cross section measurements, indicating that if a heretofore unknown systematic error does exist in the cross section measurements, then it is intrinsic to all such measurements

[en] We studied the reaction 12C(e,e'p) in quasielastic kinematics at momentum transfers between 0.6 and 1.8 (GeV/c)² covering the single-particle region. From this the nuclear transparency factors are extracted using two methods. The results are compared to theoretical predictions obtained using a generalization of Glauber theory described in this paper. Furthermore, the momentum distribution in the region of the 1s-state up to momenta of 300 MeV/c is obtained from the data and compared to the Correlated Basis Function theory and the Independent-Particle Shell model