[en] The fine structure of the L-group of Roentgen lines and emission bands of tantalum in its metastable high-pressure nitrides in initial products is investigated. More considerable changes in relative integral intensity at transition from Ta to ε-TaN, τ-TaN and TaN_cub are shown to be observed in the L-line corresponding to the 2p_3/2 → 4f_5/2,7/2 transition

[en] The results of a beam test of a prototype of the BELLE CsI(Tl) calorimeter are reported. The test used beams of photons with energies spanning the range from 20 MeV to 5.4 GeV, produced at ROKK-1M facility of the Budker Institute of Nuclear Physics. The single-counter energy-equivalent noise was measured to be ∼200 keV. The design goals for the energy resolution, e.g. 4% at 20 MeV and 1.7% at 5.4 GeV, were achieved using the sum of energy deposits in a 5x5 crystal matrices with a single crystal energy threshold of 0.5 MeV; the summed energy deposit measured in the array corresponds to 97±2% of the incident photon energy over the entire energy range. The average position resolution for 470 MeV energy photons was measured to be 8 mm

[en] The results of the BELLE barrel calorimeter prototype test with the tagged photon beam are presented. The prototype consisted of 36 CsI(Tl) counters with the same readout system as the BELLE calorimeter. The measurements were carried out at the VEPP-4 collider with the tagged photon beam provided by the ROKK-1M facility. The energy resolution for photons was measured in the energy range 40-800 MeV. The results are in good agreement with the Monte-Carlo simulation. (orig.)