Experimental studies of the Li/sup +/ + He interaction have been extended to smaller internuclear separations to clarify a discrepancy between experiment and theory in the elastic cross sections and to observe and measure cross sections for inelastic excitation. For R less than or equal to 0.5 a/sub 0/ the elastic scattering differential cross section is observed to droop far below that expected from a single-state interaction based on ab initio ground-state potentials. In this same region of R both one- and two-electron excitations of He are observed to be strongly excited, and cross sections were measured for each of them. The lowest inelastic channel is an electron-capture state, which is observed indirectly to be strongly populated also. A diabatic correlation diagram is constructed that exhibits the basic interactions responsible for the excitation.

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Sixteen heat source assemblies have been tested in support of the SNAP 19 Pioneer Safety Test Program. Seven were subjected to simulated reentry heating in various plasma arc facilities followed by impact on earth or granite. Six assemblies were tested under abort accident conditions of overpressure, shrapnel impact, and solid and liquid propellant fires. Three capsules were hot impacted under Transit capsule impact conditions to verify comparability of test results between the two similar capsule designs, thus utilizing both Pioneer and Transit Safety Test results to support the Safety Analysis Report for Pioneer. The tests have shown the fuel is contained under all nominal accident environments with the exception of minor capsule cracks under severe impact and solid fire environments. No catastrophic capsule failures occurred in this test which would release large quantities of fuel. In no test was fuel visible to the eye following impact or fire. Breached capsules were defined as those which exhibit thoria contamination on its surface following a test, or one which exhibited visible cracks in the post test metallographic analyses.

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We propose to study high-energy neutrino intersections in the NAL 30 m{sup 3} bubble chamber. A slight alteration of the chamber design will allow a large-solid-angle quantameter to be placed just outside the thin (1/2 inch steel) wall of the bubble chamber. A detector, designed to identify the muon of the interaction is placed outside the vacuum tank. With this hybrid system they can reconstruct the neutrino's energy, the lepton momentum transfer squared, Q{sup 2}, the lepton energy transfer and measure many features of the final hadron state. This system detects with high efficiency over the entire range of variables and is well suited to making a detailed general survey of neutrino interactions in the neutrino energy range 15 to 80 GeV. A million-picture exposure would yield tens of thousands of neutrino interactions with circulating protons at 200 GeV. A similar number of events should be obtained with protons at 500 GeV.

We propose a systematic study of elastic and quasi-elastic scatterings of pp and {bar p}p in the forward region (|t{vert_bar} {approx}< 1.5 GeV{sup 2}) from {approx} 20 to 40 GeV/c by using the single-arm spectrometer of NAL Exp. 7 without any essential change. The physics interests in this energy region warrant a precise comparison between pp and {bar p}p as a function of s(t) for fixed t(s). Therefore it is essential to use the same experimental apparatus and analysis procedures in order to minimize possible systematic errors. The possible future experiments at Serpukhov will not be able to produce sufficient flux in the secondary {bar p} beams to answer the physics questions raised in this proposal.

We propose here to take 50,000 pictures of the NAL 30-inch bubble chamber, filled with hydrogen and exposed to 200 GeV/c beams of negative pions. We intend to study the technical limitations of the use of a bubble chamber for such high energy interactions. At the same time we will investigate the physics contained in the pictures as much as and as soon as possible. We expect to finish the study made only by scanning in a month and to end all studies in six months after getting film. Even in the energy of 200 GeV region, interactions will be accompanied with some slow secondary particles, which will be the object of analysis most interest. However majority of interactions may have a jet like topology. We will mainly use our FSD for the analysis of this experiment and the accuracy in momentum measurement and the separation of each track in a condensed jet may be the main subjects of our technical study. In the 30-inch bubble chamber, we propose to insert a target plate and a gamma conversion plate, if the situation of the chamber will allow to do so. A short discussion for the insertion of plates will be …

We propose an investigation of neutrino interactions in the deuterium filled 15-foot bubble chamber at NAL. A 250,000 picture run with 200 GeV protons should yield very interesting physics even with a 'bare' deuterium chamber. This addendum extends the physics discussion in the original proposal to the search for charm particles, and the study of neutral currents. A ({nu}{sub {mu}},d) bubble chamber exposure with E{sub P} = 200-300 GeV is the most promising experiment that can be done to search for the type of charm particles that are essential to Gauge theories of weak and electromagnetic interactions. This addendum updates and summarizes Proposal 151. We propose a 300,000 picture run of the 15-foot bubble chamber filled with deuterium exposed to a wide band, 2 horn, neutrino beam from protons of energy E{sub p} {ge} 300 GeV. The analysis will be based primarily on the bare bubble chamber data but will also use the EMI wherever useful. The physics purposes of the experiment include: (1) Extensive search for charmed baryons and mesons; Determination of the ratio of the total charged current cross sections {sigma}({nu},n)/{sigma}({nu},0); (3) Determination of d{sup 2}{sigma}{sup C.C.}/dxdy for ({nu},n) and ({nu},p) interactions separately; (4) Study of ({nu},n) and …

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The National Accelerator Laboratory opens up a new era in our search of what elementary particles are like; the 100-500 GeV era. If we want to look at the structure of hadrons with the resolution provided by the wavelength of such high energy beams, what can be more natural, to paraphrase Bjorken, than looking at them, i.e. shining light at them and watching for scattering or absorption? This is precisely what we propose to do in the experiments suggested here. Photons, real and virtual, have contributed immeasurably to our understanding of hadronic matter through investigations done at lower-energy (1 {le} E {le} 20 GeV) electron accelerators. NAL, albeit a proton machine, will be our only potential source of photons beyond SLAC energies. Proton-nucleus collisions will produce photons, principally in two-step processes involving radiative hadron (notably {pi}{sup 0}) decays. It has been shown that sizeable fluxes can be obtained by the appropriate construction of beam lines. NAL will then be a unique tool for the study of electromagnetic interactions at energies in the 20-300 GeV range. At high energies ({approx}> 200 GeV), available electron fluxes will set the limit on photon intensities for experimentation; at lower energies, fluxes rise strongly, but …

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