Very High Energy Neutron Scattering from Hydrogen

High Energy Neutron Scattering Benchmark of Monte Carlo Computations

Neutron scattering measurements are made using an array of proton recoil detectors surrounding a scattering sample, which is struck by a beam of neutrons. Detector signals are analyzed using a state of the art digital data acquisition system, and these measurements are compared with the expected detector response based on Monte Carlo simulation of the scattering experiment using existing nuclea...

Inelastic Profon - Proton Scattering at Very High Energy

High Energy Radiation from Neutron Stars

High Energy Radiation from Neutron Star Binaries

This paper surveys our current knowledge of the hard X-ray emission properties of old accreting neutron stars in low mass X-ray binaries. Hard X-ray components extending up to energies of a few hundred keV have been clearly detected in sources of both the Atoll and Z classes. The presence and characteristics of these hard components are discussed in relation to source properties and state. An o...

Maps of subsurface hydrogen from the high energy neutron detector, Mars Odyssey.

After 55 days of mapping by the High Energy Neutron Detector onboard Mars Odyssey, we found deficits of high-energy neutrons in the southern highlands and northern lowlands of Mars. These deficits indicate that hydrogen is concentrated in the subsurface. Modeling suggests that water ice-rich layers that are tens of centimeters in thickness provide one possible fit to the data.