Results 1 - 10 of 20351
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[en] Radioactive isotope beam (RIB) can enhance an application field of a conventional radioactive isotope (RI), because RIB technique can control detail characteristics of RI such as a polarization or a penetration depth. For example, 8Li is should be polarized and the energy. The fundamental design study for TIS to produce 8Li beam is conducted in this study. 8Li is produced by the 100-MeV proton accelerator with the beryllium oxide target. The optimum target thickness, which can achieve enough 8Li production rate and avoid unnecessary neutron production, is determined by FLUKA simulation. The optimum thickness is about 24 mm. 8Li production rate with the optimum thickness is about 1010 pps by 1 μA of the 100-MeV proton beam. Also, the lithium ionization efficiency of the several surface ion source materials. The rhenium is adopted to enhance the selective ionization effect. This paper includes very fundamental results of the design study. More detail design study and computational analysis has been conducted. The TIS for 8Li beam will be fabricated and examined by further experimental study.
[en] The RARF proposes 'RIKEN RI Beam Factory' as a next facility-expanding project. The factory takes the aim at providing RI (Radioactive Isotope) beams of the whole mass range with the world-highest intensities in a wide energy range up to several hundreds MeV/nucleon. This paper describes a conceptual design of an accelerator complex most suitable for realizing the factory, and briefly presents Multi-USe Experimental Storage rings (MUSES) proposed as a new type of experimental facility. (J.P.N.)
[en] The stopping powers of gases have been measured for incident 24 MeV/u 238U and 29 MeV/u 208Pb projectiles, using the LISE spectrometer at GANIL. The results show the persistence of the 20% gas-solid effect observed at lower energy. The effective charges derived from these measurements depend on the atomic number of the target in a way very similar to that observed for solid degraders. (author)
[en] Results of a low power survey of axial sputtering, to test sputtering efficiency at incremental radial offsets from on axis position, is reported. Also, prototype axial sputtering hardware has been tested in the SuSI ion source and the uranium ion production results is discussed. The paper is followed by the associated poster. (authors)
[en] The 3H/3He mass spectrometry experiment features two hyperbolical Penning traps and an external ion source in order to measure the Q-value of the 3H to 3He beta decay. The setup is designed to allow fast switching between 3H and 3He ions. This will enable us to decrease the dead time between cyclotron frequency measurements on the different ion species, which will in turn decrease the influence of magnetic field drift and other time dependent perturbations on the measured Q-value. This talk will focus on the challenges of single ion transport in a precision trap with high impedance electrodes.
[en] Fission cross sections resulting from a 120 MeV/nucleon 238U beam incident upon Be, Al, Cu, Ag, and U targets have recently been measured by Justice et al. [Phys. Rev. C 49, R5 (1994)]. The electromagnetic contribution to these experimental cross sections have been compared to Weizsaecker-Williams theory which is based on first-order perturbation theory. The present work calculates the contribution to these cross sections due to higher-order excitations. Our results show that these corrections are insignificant in comparison to experimental error
[en] In early June 1992 the original CERN 50 MeV proton Linac accelerated its last beam after nearly 33 years of loyal service. Although conceived as a proton machine and commissioned in 1959 as an injector for the 26 GeV Proton Synchrotron, it finished its life as a light-ion source for the Super Proton Synchrotron (SPS) and as a cheap source of particles for tests in the Low Energy Anti-Proton Ring (LEAR). Highlights in its recent history were the installation of RFQs and the upgrading with an ECR source for O6+ and S12+ ions. The early parameters and the subsequent modifications as well as the performance are reviewed in this paper. (Author) 8 refs., 3 figs., tab
[en] Glass detectors, viz. sodalime, phosphate and quartz, were irradiated at GSI heavy ion facility at Darmstadt, Germany and at heavy ion Cyclotron facility at JINR, Dubna, USSR using 238U(5.9 and 15.0 MeV/u), 131Xe (5.9,11.56 and 14.5 MeV/u)197Au (11.4,11.67 and 15.96 MeV/u), 56Fe (4.0 MeV/u) and 48Ti(4.0 MeV/u) beams. Heavy ion ranges are measured in glass detectors using appropriate conditions. The calibration curves are obtained for all these glass detectors using different ion beams. The present study may be used for particle identification. (author)