Synthesis and characterization of a new compound K6Ti2Nb14O42 in K2O-TiO2-Nb2O5 system

A new compound K6Ti2Nb14O42 was found in the ternary system K2O-TiO2-Nb2O5. The compound was characterized and investigated by electron probe, X-ray powder diffraction and differential thermal analysis. The transparent crystal of light yellow color in form of hexagon-thin plate can be grown by flux method. Further, its crystal structure was determined by four-circle diffractometer. K6Ti2Nb14 O-42 crystallizes in hexagonal system with unitcell parameters a = 9.1106 (5) X 10(-10) m, c = 12.0136 (9) X 10(-10) m, Z = 1 and space group P6(3)/mcm (193)

Transverse-momentum fluctuations in π+p\pi^{+}p and K+pK^{+}p collisions at 250 GeV/c

We report results on event-by-event fluctuations of transverse momentum, Phi (p/sub t/), in pi /sup +/p and K/sup +/p collisions at 250 GeV/c. For the first time, their dependence on rapidity region, transverse momentum acceptance, multiplicity, mean transverse momentum per event, and on the correlation between transverse momentum and multiplicity are systematically presented. The results are compared with those from the PYTHIA Monte Carlo generator. The fluctuations under the same acceptance cuts as used in current heavy- ion experiments are also presented

Search for emission of gamma-ray bursts with the ARGO-YBJ detector

The ARGO-YBJ experiment has been designed to decrease the energy threshold of tipical Extensive Air Shower arrays by exploiting the high altitude location (Tibet P.R. China, 4300 m a.s..l.) and the full coverage. The lower energy limit of the detector (a few GeV) is reached with the single particle technique, recording the counting rate at fixed time intervals. We present the first results concerning the search for emission from Gamma-Ray Bursts in coincidence with satellite detections