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.
The form also estimates the expected levels of neutron activation for typical neutron flux used at the NIST BT-1 Neutron Diffractometer assuming a 24 hour irradiation. (This computation only performed when all elements are isotopically at their natural abundance).
This form is offered for estimation purposes. The NCNR does not keep records of samples evaluated with this form.
Note that use of this form is not a substitute for consulting with a Health Physicist. All samples must be cleared by a NIST Health Physicist before removal from the NCNR.
Last modified 27-October-2005 by website owner: NCNR (attn: Craig Brown)