[en] We present designs of different three-dimensional (3D) sampling electromagnetic calorimeters for the AMS experiment. The proton rejection power of 3D sampling calorimeters is discussed. A shower shape analysis procedure provides a typical proton suppression factor of ∼10⁴ for most of the designs

[en] Various methods of analogue data readont from streamer chambers being a part of the hadron calorimeter are compared. The data characterizing the distributions of the charge collected on tha anode wire are obtained. It is shown that for the direct cathode readont the value of crosstalks is less then 10% of the electrode maximum signal

[en] The results of the measurement of leptonic and bantib decays of the neutral intermediate vector boson Z⁰ with the L3 detector at LEP are presented. From these results different physical parameters are derived and compared with predictions of the Standard Electroweak Model

[en] The results of a Monte Carlo based study of the energy measurement of particles in the TeV region using a 'thin' sampling calorimeter are presented

[en] The evaluation of neutron cross-sections for Zirconium Isotopes is performed for the Soviet library of evaluated neutron data. The total, elastic, inelastic, radiative capture, (n,p), (n,α), (n,2n) and (n,n'p) reaction cross-sections and emission spectra are evaluated in the energy range from 10^-5 ev to 20 MeV and given in the ENDF/B format. An evaluation in the resonance region is based on the experimental data. Theoretical model calculations are used for evaluation of excitation functions and particle emission spectra in a smooth cross sections region. Systematics of theoretical model parameters were used for decreasing the uncertainties of the evaluated data. (author)

[en] New neutron data library for transactinides is briefly described. The library includes evaluated crosssections for fission and threshold neutron induced reactions for isotopes of U, Np and Pu at energies 0-100 MeV

[en] A gas sampling calorimeter with uranium absorbers was built and tested in a beam of pions and electrons of 1 to 6 GeV/c. As far as the detection of electromagnetic showers is concerned, no difference between uranium and a conventional absorber is found. The energy dependence of the resolution of the calorimeter for hadrons is given for 4.5 and 9 mm sampling. The measured π/e ratio is 0.83+-0.03. (orig.)

[en] The backward elastic scattering reaction π^-p→pπ^- at momenta 25 and 38 GeV/c have been measured using a magnetic spectrometer with hybrid chambers. The experimental data on the dependence of the cross section dsigma/du on the momentum transfer u as well as the energy dependence dsigma/du at u=O are given. (Auth.)

[en] The np elastic differential cross section has been measured for incident neutron momenta 100-400 GeV/c in the vertical stroketvertical stroke range 6 x 10^-6 - 5 x 10^-1 (GeV/c)². The np data of this experiment provide a first direct measurement of the hadronic amplitude for vertical stroketvertical stroke < 10^-2 (GeV/c)², which is consistent with the extrapolations from higher vertical stroketvertical stroke values. Our data for vertical stroketvertical stroke < 10^-4 (GeV/c)² are consistent with a rise which can be attributed to Schwinger scattering, caused by the interaction of the neutron magnetic moment with the proton. (orig.)

[en] The Alpha Magnetic Spectrometer in a precursor version (AMS-01), was flown in June 1998 on a 51.6 deg. orbit and at altitudes ranging between 320 and 390 km, on board of the space shuttle Discovery (flight STS-91). AMS-01 included an Aerogel Threshold Cherenkov counter (ATC) to separate p-bar from e^- and e⁺ from p, for momenta below 3.5 GeV/c. This paper presents a description of the ATC counter and reports on its performances during the flight STS-91