Abstract :
Basic data necessary for the calculation of the thermal neutron scattering cross-section of magnesium were defined. The calculation scheme is the standard one used in reactor physics. For this purpose, the NJOY code is the main piece of software. Small modifications were needed in the NJOYʹs module LEAPR to take into account the specific lattice structure of magnesium. As a result we obtain a ENDF-6 standard conforming thermal data evaluation containing both coherent elastic scattering and incoherent inelastic scattering. The calculated values were checked against experimental values. Finally, a comparison of transmission coefficients through magnesium annular structure was done using the free gas and crystal models.
