[en] In cosmic rays and in accelerators there were observed single inelastic processes with densely produced (azimuthally isotropic) groups of particles exhibiting spikes in the pseudorapidity plot of an individual event (i.e. ringlike events). Theoretically the existence of such processes was predicted as a consequence of Cerenkov gluon radiation or, more generally, of deconfinement radiation. Nowadays some tens of such events have been accumulated at 400 GeV and at 150 TeV. Analyzing ringlike events in proton-nucleon interactions at 400 GeV/c, it is shown that they exhibit striking irregularity in the positions of pseudorapidity spikes centers which tend to lie mostly at 55, 90 and 125 deg in cms. It implies rather small deconfinement lengths of the order of some fermi

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[en] The event 2+3+40 p with primary energy about 10¹³ eV in photoemulsions radiated at the altitude 12 km is analysed. There are four groups of secondary particles clearly separated in the pseudorapidity plot of the event. Two of them are especially specific because they are formed by hadrons with almost identical (and rather large) polar angles but with widely distributed azimuth angles. Such a ring structure of the target diagram can be explained as a manifestation of some new kind of hadron emission processes similar to Cherenkov electromagnetic radiation

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[en] An analysis of angular distributions in hadron-nucleon interactions at 200-400 GeV shows that considerable part of events (approximately 20%) have two maximum structure. Comparison such events with multicluster model reveals that this effect is due to production and decay of two or more clusters

[en] The experimental data on multiplicities of charged particles of different type produced in incoherent interactions of 800 GeV protons with emulsion nuclei are reported and discussed. The data are compared with the results of other experiments on proton-nucleus collisions at lower energies. It is shown that the Lund model describes well the data on multiplicities of relativistic particles. (orig.)

[en] Emission of projectile and target fragments in inelastic interactions of ⁸⁴Kr nuclei with Ag (Br) at 0.95 GeV per nucleon is investigated with the aim of detecting collective flow. A transverse-momentum analysis is performed in the reaction plane. The bounce-off of projectile fragments is observed. This effect is found to become stronger with decreasing impact parameter

[en] This paper studies the average multiplicities of singly charged relativistic particles in oxygen-induced interactions with a nuclear emulsion target over the energy range 2.1-200 GeV. A similar energy dependence as for proton-induced interactions is observed. Both the number of participating nucleons and the number of binary collisions are shown to be of importance for the particle production