Search results
27 paź 2005 · Compute Neutron Attenuation and Activation. This form estimates the neutron scattering and absorption cross sections for a given sample composition. Note that the calculation can significantly underestimate absorption due to resonance effects, but resonant neutron absorption rarely occurs in powder diffraction measurements.
- Neutron Activation Calculator
This calculator uses neutron cross sections to compute...
- Neutron Activation Calculator
4 lut 2011 · In neutron shielding calculations, we sometimes use the mass attenuation coefficient symbolized ER/D
The attenuation coefficient describes the extent to which the radiant flux of a beam is reduced as it passes through a specific material. It is used in the context of: X-rays or gamma rays, where it is denoted μ and measured in cm −1;
17 kwi 2013 · This calculator uses neutron cross sections to compute activation on the sample given the mass in the sample and the time in the beam, or to perform scattering calculations for the neutrons which are not absorbed by the sample.
1 sie 2021 · NGCal is a free online computation software for evaluating the shielding effectiveness of materials. Incoherent scattering and absorption are considered in calculations for thermal and fast neutrons. Compton scattering, photoelectric absorption and pair production are considered for photons.
Attenuation of Neutron Beam • From conservation of neutrons in beam: number scattered, absorbed, reacted removed from beam: dN = - dI •Since:N/I = n∆xσ-> N= Inσ∆x -dI= In σdx • Integrated, this yields attenuation formula in terms of total reaction cross section and foil density: I(x) = Ioexp(-nσx)
4 dni temu · Thus, to enable quantitative results based on the neutron attenuation coefficient it is crucial to be able to separate the attenuation signal from the phase effect. This can be done through ...
