A fixed-point measurement of cosmic-ray intensity has being continued at Chiba, near Tokyo in Japan to obtain the time-sequential data. High efficiency neutron rem counter and Multi-sphere neutron Spectrometer (Bonner Sphere: BS) were used for the measurement of cosmic-ray neutron components and for the evaluation of the cosmic-ray ionizing components, NaI(Tl) scintillation spectrometer was emp...

Sample load capacity, sample compatibility, influence of sample load on (3)H/(14)C counting efficiency, background count rate, figure of merit, quench resistance, and sample stability for nine selected, commercially available, liquid scintillation cocktails are presented in this study. The cocktails tested are Ecoscint A, Insta-Gel Plus, OptiPhase Hisafe 3, OptiPhase Trisafe, Ready Gel, SafeSci...

A 68 Ge source can be used to calibrate the positron detection eeciency of a liquid scintillation neutrino detector. A method to dissolve radioactive 68 Ge in pseudocumene-based liquid scintillator is described. The homogeneity of the source distribution has been studied and results for two Ge compounds are discussed. Light yield and light attenuation length of the liquid scintillator are not a...

stable isotopes of carbon, hydrogen, and nitrogen offer a number of advantages in clinical work: problems of preparation, storage, and disposal are negligible, health monitoring requirements are eliminated, and most significantly, the absence of radiochemical hazard to the patient permits their use in obstetric and pediatric measurements. It is our belief that the potential of stable isotope an...

The XENON experiment aims at the direct detection of dark matter in the form of WIMPs (Weakly Interacting Massive Particles) via their elastic scattering off Xe nuclei. A fiducial mass of 1000 kg, distributed in ten independent liquid xenon time projection chambers(LXeTPCs) will be used to probe the lowest interaction cross section predicted by SUSY models. The TPCs are operated in dual (liquid...

A dedicated test of the effects of Nitrogen contamination in liquid Argon has been performed at the INFN-Gran Sasso Laboratory (LNGS, Italy) within the WArP R&D program. A detector has been designed and assembled for this specific task and connected to a system for the injection of controlled amounts of gaseous Nitrogen into the liquid Argon. Purpose of the test is to detect the reduction of th...