Transportable accelerator sources of epithermal neutrons are crucial for the development of hospital-based boron neutron capture therapy (BNCT) as a treatment modality for brain cancers. One method for producing such epithermal neutrons is near-threshold (p,n) reactions as studied by our group, as well as several other investigators. As part of this e€ort, we have developed accurate methods for...

We analyze the flux of epithermal neutrons from the Martian surface recorded by the Russian HighEnergy Neutron Detector (HEND) from February 19 through December 19, 2002. The HEND was installed onboard the NASA 2001 Mars Odyssey spacecraft and is designed to measure neutron fluxes with energies above 1 eV. Over the period of observations, statistically significant variations in the flux of epit...

PURPOSE This report addresses the incidence of vascular endothelial cell apoptosis in the mouse small intestine in relation to the radiation-induced gastrointestinal (GI) syndrome. METHODS AND MATERIALS Nonanesthetized mice received whole-body irradiation at doses above and below the threshold for death from the GI syndrome with 250 kVp X-rays, (137)Cs gamma rays, epithermal neutrons alone, o...

Abstract The role of nanoparticle gold in the formation deposits has long been debated. Evidence support this process is generally limited to epithermal-, Carlin- and seafloor massive-sulfide-type where nanoparticles are associated with primary fluid related processes. At Kenty orogenic deposit Ontario, Canada, remobilized from early pyrite through secondary coupled dissolution-reprecipitation ...

In order to improve our understanding of the mineral potential of northern Vancouver Island beyond the wellknown intrusion-related Cu-Au-Ag(-Mo) porphyry deposits (e.g., Hushamu, MINFILE 092L 240 and the former Island Copper mine, MINFILE 092L 158) and base and precious-metal skarns (e.g., Merry Widow, MINFILE 092L 044), we need a better understanding of the stratigraphy of the Bonanza island a...

Using the standard tight binding model of 2D graphite with short range electron repulsion, we predict a gapless spin-1, neutral collective mode branch below the particle-hole continuum with energy vanishing linearly with momenta at the Gamma and K points in the Brillouin zone. This spin-1 mode has a wide energy dispersion, 0 to approximately 2 eV, and is not Landau damped. The "Dirac cone spect...

Abstract The spatial distributions of neutrons and gamma rays in the epithermal mode Kyoto University Reactor were measured using a MAGAT-type polymer gel detector doped with LiCl at 6 Li concentrations 0, 10, 100 ppm. Reasonable for thermal obtained 0 100ppm.

The epithermal neutron beam model of the Finnish boron neutron capture therapy (BNCT) facility (FiR 1) was created using the two-dimensional (2D) discrete ordinates transport (DORT) code. The final design of the beam was achieved using the DORT model: the optimal thickness of the neutron moderator and the length and the thickness of the bismuth collimator of the beam were calculated. The final ...