[en] Deformation behavior of three dimensional glass fabric reinforced plastic (3D-GFRP) has been studied to determine their applicability for large scale superconducting magnet system as insulating and/or supporting materials. An experimental study was carried out to clarify the relationship between the construction of reinforcement and the mechanical properties of the composites. The results were compared with those of the usual GFRP (2D-GFRP). The tensile strength of 3D-GFRP does not depend on the fibers in the thickness direction, but the Young's modulus does. It is found that the fibers in thickness direction, which originate the superiority of 3D-GFRP to 2D-GFRP, have important roles on the deformation behavior in 3D-GFRP

[en] Fusion superconducting magnets are 'series machines' in the sense that the complete magnet may decrease in overall performance when even one component does not deliver the expected performance. Such magnets are often operated under severe conditions, such as radiation environments and those materials which are most prone to damage under such radiation environments demand particular attention. The component most sensitive to radiation damage in the fusion magnet is the organic composite material used for insulation, usually glass fibre reinforced plastic (GFRP). Radiation resistant GFRPs have been developed and these will be discussed in this work, together with other aspects of radiation damage of organic composite materials. (author)

[en] The insulating and/or structural materials for the fusion superconducting magnets are used under such strict environments as the cryogenic temperatures, high stresses and radiation environments. It is recognized that the usual laminated composite materials reinforced by glass clothes (2D-GFRP) are difficult to be used in such strict conditions. The three dimensional glass fabric reinforced composite materials (3D-GFRP) have high interlaminar shear strength due to the fibers in thickness direction. The cryogenic and radiation resistance properties of 3D-GFRP had been measured and the results compared with those of the 2D-GFRP

[en] Early morning and 24 h urine samples and serum were collected daily throughout the menstrual cycle in women. Urinary oestradiol-17-glucosiduronate (E₂-17G) was measured with a direct radioimmunoassay whose antiserum has been prepared against E₂-17-G-[C-6]-bovine serum albumin conjugate and was very specific. On the average, E₂-17-G in early morning and 24 h urine samples showed a prominent peak one day before the peak of urinary LH. The time relationship between these urinary E₂-17-G and serum E₂ levels and peaks was also investigated. (author)

[en] The three dimensional fabric reinforced plastics (3D-GFRP) for cryogenic use have been developed making the selection of matrix, the optimization of 3D- fabrics and the investigation of fabrication processes. The epoxy matrix has been selected considering the durability against thermal shock and easiness of fabrication. The three dimensional fabrics have been constructed varying the orientation and the tension of glass fibers. The possible combination of epoxy matrix and 3D-fabrics were decided and then 3D-GFRP were fabricated. The cryogenic performance of the 3D-GFRP were examined. In this work, particular attention has been paid to thermal properties and they have been measured down to cryogenic temperatures. The thermal contraction of GFRP is thought to be small enough in practical cryogenic application. The usual GFRP (2D-GFRP) were also made using the identical components of 3D-GFRP and their dimensional stability were compared each other. It is found that concerning the thermal contraction 3D-GFRP show much more isotropic characteristics compared with 2D-GFRP as expected

[en] Space Star (SS) anomaly in nd breakup cross section was first reported in 1989 at E_n = 13 MeV (Strate et al. in Nucl Phys A 501:51, 1989), but its origin has not been found yet. In order to obtain suggestions for its origin, we made systematic measurements of pd breakup cross section around SS. In SS configuration, three outgoing nucleons form an equilateral triangle and the triangle is perpendicular to the beam axis. Necessity of the equilateral and perpendicular conditions of SS anomaly was investigated by systematic experiments. Also energy dependence of SS anomaly is being studied at energies from E_p = 7.5 to 13 MeV. (author)

[en] The PANDORA (Particle Analyzer Neutron Detector Of Real-time Acquisition) system, which was developed for use in inverse kinematics experiments with unstable isotope beams, is a neutron detector based on a plastic scintillator coupled to a digital readout. PANDORA can be used for any reaction study involving the emission of low energy neutrons (100 keV–10 MeV) where background suppression and an increased signal-to-noise ratio are crucial. The digital readout system provides an opportunity for pulse shape discrimination (PSD) of the detected particles as well as intelligent triggering based on PSD. The figure of merit results of PANDORA are compared to the data in literature. Using PANDORA, $91\pm 1\text{\%}$ of all detected neutrons can be separated, while $91\pm 1\text{\%}$ of the detected gamma rays can be excluded, reducing the gamma ray background by one order of magnitude.

[en] We have measured a complete set of deuteron analyzing powers in deuteron–proton elastic scattering at 190, 250, and 294 MeV/nucleon. The obtained data are compared with the Faddeev calculations based on the modern nucleon–nucleon forces together with the Tucson-Melbourne’99, and UrbanaIX three nucleon forces. The data are also presented with the calculations based on the N4LO NN potentials of the chiral effective field theory. (author)

[en] In RIKEN RIBF, we are working on the experimental project to measure the fission barrier height and fission fragment distributions on unstable nuclei using intense RI (radioactive ion) beams. The (p,2p) direct reaction will be used as a clean reaction to populate the hole state in heavy unstable nuclei of interest. Experimentally, we will measure the excitation energy of the state and simultaneously will provide the information on whether fission occurs or not as well as what kinds of fission fragments are emitted with what momentum vectors. As a big advantage of the inverse kinematics, this set of the information would be given even by event as a set of correlated observables, which will, for the first time, lead to a 'complete set' of fission observables and enables a completely new approach to analyse this phenomenon. For example, combining the information of the excitation energy with the information on whether fission occurs or not, one could know the fission 'threshold' energy, which roughly speaking corresponds to the fission barrier height defined as the highest point of the potential energy surface. Around this point, we will be able to measure the fission fragment distributions as a function of the mass and charge number of both fragments. This will enhance the shell effect on the fission fragment pattern through the removal of the washout effect based on this excitation energy selection around the fission barrier height. The experimental programs are aiming to perform these measurements in neutron-rich / proton-rich sides of stable U isotopes, covering the transient region where the asymmetric fission pattern changes to symmetric ones. That will provide strong constraints on the nuclear models which can be used for predicting the role of fission recycling along the r-process path and the ending point of the path. The actual experiments have not yet still be done. In this talk, we will present the development of the new (p,2p) setup required for this project. This document is made up of an abstract and the slides of the presentation. (authors)

[en] The charge-exchange (p, n) reaction at 220 MeV has been measured to extract the strength distribution of Gamow-Teller transitions from the doubly magic unstable nucleus ¹³²Sn. A recently developed experimental technique of measuring the (p, n) reaction in inverse kinematics has been applied to the study of unstable nuclei in the mass region around A ∼ 100 for the first time. We have combined the low-energy neutron detector WINDS and the SAMURAI spectrometer at the RIKEN radioactive isotope beam factory (RIBF). The particle identification plot for the reaction residues obtained by the spectrometer provides the clear separation of the CE reaction channel from other background events, enabling us to identify kinematic curves corresponding the (p, n) reaction. Further analysis to reconstruct the excitation energy spectrum is ongoing. (authors)