Production Asymmetry Measurement of High Xt Hadrons in pp Collisions at 40 GeV

Single-spin asymmetries for hadrons have been measured in collisions of transversely-polarized 40 GeV/c proton beam with an unpolarized liquid hydrogen target. The asymmetries were measured for pi+-, K+-, protons and antiprotons, produced in the central region (0.02 < Xf < 0.10 and 0.7 < Pt < 3.4 GeV/c). Asymmetries for pi+-, K+- and antiprotons show within measurement errors the linear dependence on Xt and change a sign near 0.37. For protons negative asymmetry, independent of Xt has been found. The results are compared with those of other experiments and SU(6) model predictions.Comment: 25 pages (Latex), 12 Postscript figure

Thermodonor activation energy and mechanisms of tensoeffects in transmutation-doped y-irradiated silicon

Activation energy of high temperature technological thermodonors (TD) has been determined in transmutation-doped n-Si(P) using the data analysis of the Hall-effect temperature dependence. Physical mechanisms of tensoeffects in n-Si(P) crystals doped by neutron irradiation and doped at growth were studied by the tensoeffects measurements and by analysis of the pressure dependencies of the electron concentration ratio in "upper" and "lower" L1-valleys of uniaxially strained samples. Comparison of the some parameters for the crystals doped either by neutron transmutation method or in the melt is carried out