capture primarily fast neutrons absorbing them or thermalizing them these thermal neutrons being the ones that are captured by the boron contained in the mixture for shielding and or attenuation of x rays energies of up to about 500 kev energy range where the photoelectric effect predominates the utilization of barite baso 4 as aggregate has been envisaged since due to the atomic structure of the main component of the aggregate used barium is more effective than other aggregate components with lower z in the shielding effect which is intended to be generated since the photoelectric absorption cross section is proportional in first approximation to z 5 i e heavily dependent on the atomic number of the absorbent material 56 in the case of barium main component of barite its utilization as basis of this product is optimal for high energy photons above 500 600 kev which are subjected to the compton effect where the mass is a fundamental aspect for the attenuation and absorption of these particles the use of minerals such as magnetite hematite and even inclusion of steel shot has been envisaged reaching densities of 4 3 kg dm 3 on a regular basis u00b1 15 without the addition of shot using the same hydrocarbon as a binder finally it has been verified experimentally that in some cases for instance in mixtures corresponding to specific shields against neutrons x rays under 500 700 kev and gamma rays above this intensity and with regard to the main aggregates in the composition of the different corresponding materials.