No abstract available

[en] An overview of the Japan Hadron Project is given. The project will open new intensity frontiers for nuclear and particle physics as well as muon and neutron sciences

[en] The weight loss of stainless steel in corrosion with iodine vapor was studied at 500 to 1000⁰C and an iodine vapor pressure range of 0.05 to 0.5 mm Hg, using a thermobalance. In the initial stage of corrosion, the weight loss rate is largely influenced by solution treatment or surface treatment; the induction period, observed for solution-treated samples, is shortened or eliminated by fission-fragment irradiation, ion-bombardment or mechanical polishing, and in some cases corrosion is even accelerated by the surface treatments. A constant weight loss region follows the initial stage of corrosion. In this region, the weight loss rate is not dependent on treatment to the samples, and has a linear relationship with the vapor pressure of iodine. The rate is the largest at about 800 and 750⁰C for AISI 316 s. s. and AISI 304 s. s. The rates in general are larger for AISI 304 s. s. than for AISI 316 s. s. below 700⁰C but almost the same above 800⁰C. Corrosion product layer is observed on the surface of the sample below 700⁰C. Based on these findings, the corrosion process is discussed. The deposition of corrosion product in a temperature gradient tube is also described

[en] We have been studying double-Λ hypernuclei by observing sequential pionic decays at BNL-AGS (E906). We describe the principle of the experiment and report the present status. (orig.)

[en] An offset of a straight step, called a kink, is occasionally formed on semiconductor surfaces. The motion of the kink on the Si(1 1 1) 7x7 surface in the [1-bar 1-bar 2] step was studied in detail by high-temperature scanning tunneling microscopy (STM), and thermal fluctuations of the kink displacement along the step edges was observed. The kink displacement did not diverge with time, suggesting that a restoring force acts on the kink. The displacement, however, could be clearly represented by the gaussian distribution and it was therefore considered to be a Brownian particle. The temperature dependence of the mean square displacement of the kink position showed that the displacement is a thermal activation process with an apparent activation energy of 1.54±0.1 eV. From the equation of motion on the kink displacement including an incoming and outgoing flux as a fluctuation source, the phenomenological Langevin equation was derived. The activation energy of the kink displacement is related to the diffusion coefficient of the two-dimensional adatom gas and the latent heat of the atoms from the kink site to the surface adatom

No abstract available

[en] We report the Shubnikov-de Haas (SdH) oscillations observed in the vortex liquid state of the organic superconductor κ-(BEDT-TTF)₂Cu(NCS)₂. Below the upper critical field H_c2 of about 7 T, the additional damping of the SdH oscillation amplitude appears, as well as that of the de Haas-van Alphen (dHvA) oscillations. In the quantum fluctuation region at lower temperature. The oscillation amplitude of the SdH effect shows a stronger damping than that of the dHvA oscillations. The different magnetic field dependence of the additional damping of the oscillation amplitude may come from the effect of the transport current on the short-range order of vortices in the quantum vortex slush state which appears in the quantum vortex liquid region

[en] A system is designed to measure the fluorescence light emitted from the transitions 1S-2P of L sub alpha line (lambda=1215 A) or 2P-2S or 2P-3D of H sub alpha line (lambda=6563 A), excited by the laser induced fluorescence method. The signal-to-noise ratio (S/N) is evaluated at the measurement in the parameter (n-bar sub e = 10 to the 12th to 10 to the 14th per cu. cm, T sub e = 10 eV - 1 KeV) of tokamak plasma. The light paths in JFT-2M and JT-60 tokamaks are proposed

No abstract available

[en] We describe recent experimental results of double-strangeness systems using visual detectors at KEK; the trapping probability of strangeness in nuclei in the (K^-,K⁺) reaction on an emulsion target and H search with a scintillating fiber detector. We also discuss future directions of the research. (orig.)