[en] Double differential cross sections for nearthreshold and subthreshold production of K⁺ with momentum 1.28 GeV/c at 10.5 degree on Be, Al and Cu targets had been measured. The performed analysis of the excitation functions and target atomic mass dependencies evidences for high order multinucleon correlation are involved in deep subthreshold kaon production. (author)

[en] Yields of K⁺ and K^- mesons from proton-nucleus collisions at the subthreshold energy range were measured. Kaons produced at 10.5 deg. with momentum 1.28 GeV/c were detected by a beam-line focusing hadron spectrometer (FHS). The parameters of the Folding model were fixed by the best fit to the K⁺ data. Calculation with normal antikaon mass underestimates the experimental cross section of K^- production by a factor of 2.5. In-medium antikaon mass was found to be 0.6-0.85 of its vacuum mass depending on the parametrization of the total cross section for K^- production in pN collisions. (author)

[en] The parity non-conserving asymmetry of the resonance scattering of circularly polarized γ-rays with an energy of 7.646 MeV from the reaction ⁵⁶Fe(n vector, γ₀)⁵⁷Fe by ²⁰⁵Tl nuclei was investigated. A value of α=(4.8±1.5)x10^-5 was measured, which is an order of magnitude greater than the theoretically expected mean values for both the ²⁰⁵Tl(vector γ, γ') and the ⁵⁶Fe(n vector, γ₀) reactions. No contradiction to theory can be stated since large statistical fluctuations are possible for the effect. (orig.)

[en] The PCN-Asymmetry of the resonance scattering of circularly polarized neutron capture gamma-rays was investigated for the following nuclei as scatterers: ¹¹²Cd, ¹¹⁸Sn, ¹³⁹La, ¹⁴¹Pr, ¹⁴²Nd, ²⁰⁵Tl and ²⁰⁸Pb. The experiments were carried out on the polarized neutron beam of the Institut Laue Langevin's High Flux Reactor. For six nuclei-scatterer combinations limits on the value of the PNC-asymmetry of the order 10^-4 to 10^-3 were obtained. For ²⁰⁵Tl a PNC-asymmetry of a=(+ 4.8 ± 1.5).10^-5 was observed

[en] The PCN-asymmetry of the resonance scattering of circularly polarized neutron capture gamma-rays was investigated for the following nuclei as scatterers: ¹¹²Cd, ¹¹⁸Sn, ¹³⁹La, ¹⁴¹Pr, ¹⁴²Nd, ²⁰⁵Tl and ²⁰⁸Pb. The experiments were carried out on the polarized neutron beam of the Institut Laue Langevin's High Flux Reactor. For six nuclei-scatterer combinations limits on the value of the PNC-asymmetry of the order 10^-4 to 10^-3 were obtained. For ²⁰⁵Tl a PNC-asymmetry of a=(+4.8±1.5)x10^-5 was observed. (orig.)

[en] Published in summary form only

[en] First results of a series of studies on gas microstrip chamber prototypes prepared on sapphire substrates are presented. The sapphire substrates were prepared by ion-assisted deposition technique in one of the chambers and by placing an approximately 1 μm boro-silica glass film on a second chamber. Responses to X-rays and beta electrons and high rate performance were studied with argon-isobutane and argon-DME gas mixtures. Counting rates of 6x10⁵ counts/mm²s) were achieved for X-rays from an X-ray generator with similar 50% change in gas gain. The timing response (relative to a fast plastic scintillator) of ultraviolet-light-ionized photoelectrons were studied with an argon-ethane gas mixture. Timing peaks having widths of less than 85 ns (σ) were obtained. Details of the experimental setup and results are presented. ((orig.))