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[en] The paper describes an electronic circuit of a spectrometer of recoil nuclei based on telescopes of semiconductor Δ E - E detectors operating on-line with BESM-4 computer. The spectrometer makes it possible to obtain simultaneously eight two-dimensional histograms Δ E,E - Δ E, i.e., to measure the differential cross-section in eight corners, to identify the recoil nuclei and measure their energy. The spectrometer electronic circuit, the detector number coding logic, operation of the amplitude-digital converters are described briefly. Illustrations of spectrometer operation in studying elastic α-α -scattering on the LVEh synchrophasotron are presented

[en] The spectrometer of recoil nuclei operating at the Dubna synchrophophasotron is briefly described. The method of cooling semiconducting detector telescopes and preamplifiers of the spectrometer, placed inside a vacuum chamber of the accelerator, by means of heat pipes (HP) is described. The HP basic properties and the peculiarities of their design are presented. The design and technology of making the heat pipes used in the spectrometer are described in detail. The conduction of the heat pipes (6O cm long, 12 mm in diameter, having freon-22 as a heat-transfer agent) is 20-30 times higher than that of copper. The use of the spectrometer in experiments has shown a reliable and effective operation of HP

[en] Inclusive cross sections for the emission of ⁶He and ^6,7,8Li at laboratory angles of 45 deg, 90 deg and 135 deg in ⁴He collisions with Ag and Au targets at a beam kinetic energy of 3.33 GeV/nucleon are presented. Assuming the existence of an intermediate object emitting secondary particles, its velocity and temperature for different fragment energies have been founded. The ratios of the spectra of ⁶He to ⁶Li and ⁷Li to ⁶Li are considered. It has been shown that the inclusive cross sections can be successfully described assuming the existence of two mechanisms of fragment emission: the evaporation of slow fragments from the residual nucleus and the decay of fireball-like objects. No qualitative difference has been found between the production processes of the lightest (A_f=1-4) and medium-mass (A_f=6-8) fragments

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[en] A search for nuclei with anomalous interactions (anomalons) having a lifetime of more than 5x10^-8 s and for fractionally charged fragments among the products of interaction of oxygen nuclei accelerated up to a momentum of 4.5 GeV/c per nucleon is made. The primary beam traverses a thin target placed inside the accelerator chamber. The fragments are detected by means of a telescope of semiconductor detectors placed at 18 m from the target. The free path in silicon of accelerated ₃⁷Li, ₅¹⁰B, ₆¹²C nuclei and of fragments with charges from 2 to 7 and momentum of 4.5 GeV/c per nucleon are measured. The admixture of anomalons and fractionally charged nuclei among the normal fragments with charges 2≤Z≤7 is estimated. The upper limit of the anomalon fraction is 0.8% and of fractionally charged fragments is 2x10^-4 (at the 95% confidence level)

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[en] The experimental results on the differential cross sections of the elastic d-d scattering at deutron momentum of 4.6 GeV/c in the range of 4=momentum transferred squared 0.0275<=|t|<=0.146 (GeV/c)² are presented. The data are analysed using the Bethe differential formula and are compared with the calculations by Glauber's model. A good accord is stated

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No abstract available