Effects of mechanical and thermal stresses on the absorption coefficient and penetration range of β particles in aluminium

Many results have been obtained in our previous studies on the effects of structural defects on the physical properties of crystalline materials. In this work, we are presenting our experimental results for the influence of the structural defects on the absorption coefficient and the penertration depth of β particles in aluminium metal. For this investigation, 3 pieces of Al foils, with different thicknesses were prepared. Then, one group of samples were annealed to show less defects. Other A1 samples were exposed to heavily defect creating work, such as: hammering, rolling, and thermal quenching treatments. Then, by the use of the conventional method, the penetration depth of P-particles of different energies from 90Sr, 36CI, and 13Cs sources were determined. Our results show that the measured R-values for the defected samples are higher than those of the annealed ones. Also, it was found that the penertration depth for the defected samples increases as the P-particle's energy increases