The s and? dependence of incoherent #(3100) photoproduction from deuterium has been measured at the Stanford Linear Accelerator Center. #(3700) photoproduction and #(3100) photoproduction from hydrogen have also been measured.

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We present new ASCA observations covering the 0.5-10 keV X-ray range of the cooling neutron star candidates PSR 0656ϩ14 and PSR 1055Ϫ52. Previous ROSAT observations had shown that two-component models, either two blackbodies or a blackbody plus a power-law, provided the best spectral fits to their X-ray emission. The combined ASCA and ROSAT spectrum of PSR 0656ϩ14 reveals two blackbody components with T 2 8 ϫ 10 5 K and T 2 1.5 ϫ 10 6 K and shows evidence that a power-law component is needed to account for higher energy photons. This three-component fit gives a reduced 2 that is half the value of a more conventional two component fit (1.3 as compared to 2.4). The fit to the combined spectrum for PSR 1055Ϫ52 yields a two-blackbody fit with T 2 8 ϫ 10 5 K and T 2 3.7 ϫ 10 6 K. Our results favor the existence of a hot polar cap in each of these pulsars with the ratio of the polar cap area to the neutron star surface area being 7 ϫ 10 Ϫ3 and 3 ϫ 10 Ϫ5 for PSR 0656ϩ14 and PSR 1055Ϫ52, respectively. The results are compared to models that make predictions of polar cap heating processes.

We present a study of antineutrino interactions in hydrogen obtained in a 138000-picture run at the BNL 7-ft bubble chamber. The antineutrino beam had an energy distribution that peaked at -1.1 GeV. The cross section measured for charged-currect interactions is cr(i7p + p C + anything) = (0.32 + 0.08) x X [E; (GeV)] cm2. The neutral-current cross section is a ( i 7 p -C p r C r -) = 5.5::; x cm2. The ratio of strangeness-changing to non-strangeness-changing charged currents is R, = 0.06' ;:;:.An upper limit determined for charm production is u, < 3.8 X cm2 at the 90% confidence level. From the momentumtransfer distribution we measure average Q 2 for inelastic charged-current events with energy greater than 2 GeV,

J/ip photoproduction has been measured from beryllium and tantalum targets by observing the yield of single muons at a transverse momentum of 1.65 GeV/c with a bremsstrahlung beam of £ 0 = 20 GeV. The results have been interpreted in terms of a nuclearoptics model to yield the ^-nucleon total cross section. The result is oty A = 3.5± 0.8 mb.A search for ixe events produced in an antineutrino hydrogen-neon experiment using the Fermilab 15-ft bubble chamber is reported. Based on a single candidate, the 90%-confidence upper limit for the relative yield of ii+e~ events is 0.5% of all charged-current events with antineutrino energy greater than 10 GeV.

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