[en] The analysis of inclusive prompt muons production in the proton beam-dump experiment is performed. On the basis of this analysis the model-dependent estimates of the cross-section for charmed particles production in pFe-collisions at √=11.5 GeV are obtained

[en] In the IHEP proton beam-dump experiment muon yields were measured. Possible contribution to these yields of the muons from charm decays was evaluated and an estimate of the charm production cross section was obtained

[en] Direct muon yields measured in pFe-collisions at 70 GeV are compared with the expected contribution from the dimuon production. This contribution is shown to be equal to (82+-4+-12)% on the average for the xsub(F) region of 0.09 < or approximately xsub(F) < or approximately 0.6 (where xsub(F) is the Feynman variable). Model-dependent limits on charm particle production cross section are obtained

No abstract available

[en] Inclusive yield of prompt muons has been measured in the new beam-dump experiment. Production cross sections of charmed particles in pA interactions have been estimated at √s=11.5 GeV/c. 5 refs.; 2 figs

[en] The further results on direct muon production in the proton-nuclear interactions on an iron target at 70 GeV are presented. Muon to pion ratio was found to be independent of the transverse muon momentum Psub(T) at fixed longitudinal muon momentum Psub(L)> 7 GeV/c within 15 percent. At the Feynman variable Xsub(F) approximately equal to 0 and Psub(T) approximately equal to 1 GeV/c (μ⁺ + μ^-)/2π⁺ ratio is equal to (7.0 +-1.1)x10^-5, thus indicating constant μ/π value over the Psub(T) range from about 1 to 3 anti GeV/c. Total direct muon yield in the center of mass forward hemisphere is equal to (3.6 +- 0.5)x 10 ^-4 per interacting proton

[en] A sonic signal, produced in a steel rod irradiated by a pulsed muon beam, has been studied. Its agreement with the predictions of the thermo acoustic mechanism of generation in the geometric approximation of linear cylindric antenna has been shown. The expected sonic signals from the neutrino beam of multi TeV machines have been estimated with the view to define possibilities to use them in geophysics to forecast earthquakes. 11 refs.; 6 figs.; 2 tabs

[en] Methods and results of absolute calibration of ionization chambers using nuclear emulsions are described. The absolute calibration consists in determination of the coefficient, which relates the chamber signal with a number (or flux density) of particles passing through it. The sensitivity of the reference chamber is measured with 3% accuracy and is equal to (2.22+-0.07)x10₆ muons/cm₂xV. It is shown that the dependence of the calibration coefficient on the depth and radial chamber position in a filter has not been revealed within the errors of every definite measurement (+-4%). The results of several calibration exposures during three years (1979-1981) are described by a straight line. The experiments carried out have just shown independently on proton beam intensity monitor a direct proportionality of ionizaiton chamber signals to muon flux density and the absence of any direct component, which might cause a systematic error during muon flux measurement

[en] Results on the limitations of inclusive νsub(μ) → νsub(x) oscillation parameters have been derived from the analysis of the IHEP-ITEP data on quasi-elastic neutrino and antineutrino scattering obtained in the IHEP neutrino beams. The mixing parameter sin² 2theta does not exceed 9x10^-2 .(90% CL) at Δm² > or approximately 15 eV²

[en] The operation of narrow gap, wide gap and multigap resistive plate chambers in an avalanche mode was studied. No advantage in avalanche-streamer separation was found for the wide gap and multigap chambers operating with Ar-based mixture as compared with the narrow gap chamber. For dense tetrafluoroethane-based mixture, proportionality was observed between streamer-free plateau width and total gas thickness, in rough agreement with corresponding shift of the maximum of avalanche charge distributions from zero. The best result was obtained for double-gap chamber with the read-out electrode located between two subgaps