[en] The new measurement algorithm for the converter of time to digital with the high time resolution is proposed. The time measurement is based on the multiphase direct transformation method. The new algorithm permits one to achieve the time resolution of ±T_e/2M, for a clock-period of T_e

[en] New results of measurements of a relative light output in typical polystyrene scintillators and fibers at continuous (4 years) cyclic irradiations with γ rays are presented. The record time (10 hours) of spontaneous recovery of the samples, to which antioxidants and photostabilizers were added instead of antirads, is obtained. Extrapolation of these results to the area of 'gigarad radiation levels' indicates the possibility of using cheap scintillating fibers in future 'spaghetti' calorimeters instead of quartz fibers. In this case, the energy resolution of hadrons improves from 150 % √E O+ 6 % to 54 % √E O+ 1.5 %

[en] Results of the development of an analogue readout electronics for the multicell drift chamber system of the HADES set-up are described. The electronics is based on the ASD-8 chip (ASIC). Main parameters of the final version are the following: the number of channels is 16, voltage supplies are ± 3 V, power dissipation is ∼ mW/ch., double pulses resolution < 100 ns, PCB dimensions are 40 x 90 mm. The second differential input of the amplifier is used for HF-noise suppression. A spatial resolution of ∼ 56 μm (σ) has been obtained with this electronics during beam test. About 32000 channels have been produced in industry in collaboration with GSI, Darmstadt

[en] Generalized virial theorems are written for rotating nuclear systems with intrinsic currents. A set of dynamical equations of motion for angular momentum, inertia and pressure tensors is obtained to study the collective vertical modes (e.g., modes including the Kelvin circulation) in nuclear excitation and reaction processes

[en] The present collection of letters from JINR, Dubna, contains six separate records on the DELPHI experiment at LEP, the Fermi-surface dynamics of rotating nuclei, production of large samples of the silica dioxide aerogel in the 37-litre autoclave and test of its optical properties, preliminary radiation resource results on scintillating fibers, a new algorithm for the direct transformation method of time to digital with the high time resolution and development and design of analogue read-out electronics for HADES drift chamber system

[en] 37-litre autoclave for the production of the silica aerogel used as the Cherenkov counter radiators has been put into operation at the Laboratory of Nuclear Problems of JINR. Some silica aerogel samples of rectangular shape 170 x 170 x 30 mm in size and cylindrical ones D = 214 mm, H = 30 mm in size with respective refractive indices n = 1.030 and 1.064 were fabricated. The measured mean number of the photoelectrons produced by the cosmic particles in the Cherenkov counter with n = 1.064 aerogel as a radiator turned out to be about 5

[en] This paper summarizes the current status of the DELPHI experiment, which is operating at the Large Electron Positron (LEP) Collider at CERN. The results from running at the energies around the Z resonance (LEP1) are based on the full available data, while the results obtained at higher energies (LEP2) are based on the data collected up to 1998. The analysis of the data collected at the highest centre-of-mass energies (above 200 GeV) is still in progress and new results are expected. We present briefly some of the most important DELPHI results paying a special attention to the contribution of JINR group to the detector construction and data analysis