Modeling of paths and energy losses of high-energy ions in single-layered and multilayered materials

Abstract

Modern electronic systems and equipment used in aerospace and nuclear technology, as well as many scientific and medical devices, are used under the influence of a wide range of ionizing radiation (electrons, protons, heavy charged particles etc.). Protons or heavy charged particles exposure can lead to failures in the operation of spacecrafts electronic devices, which is associated with the radiation effects occurrence in an integrated circuits. One of the most effective ways to solve this problem is protection by radiation shields. Linear and mass paths of protons and Ar+ ions in Al, Al2O3, Bi, and W77, 7Cu22, 3 composite shields were calculated using a SRIM software package. It is shown that the protection efficiency against high-energy ions by materials with large atomic charge values (Z) is higher from the position of linear ranges of particles, and lower from the position of mass ranges than materials with low Z values. The dependence of the threshold energy on the serial number of particles for Al, Bi and W77, 7Cu22, 3 composite shields is determined. The effect of the sequence in the arrangement and layer thicknesses in the Bi/Al/Al2O3 multilayered structures on the protection efficiency against high-energy ions was studied.

The influence of the synthesis conditions on the magnetic behaviour of the densely packed arrays of Ni nanowires in porous anodic alumina membranes

“…So, the presence of Ni and NiO crystallites in the nanowires indicates the ferromagnetic and antiferromagnetic domains coexistence. 65 It is also noteworthy that the magnetic parameters of the samples for two different temperature ranges (4.2 and 300 K) are almost the same (Fig. 6 and 7).…”

Modeling of Nonlinear Optical Phenomena in Host-Guest Systems Using Bond Fluctuation Monte Carlo Model: A Review

“…The structural damages of the host-guest system modify the local free volume characteristics and, in consequence, the amplitude of various non-linear effects. The interaction of the ions with the system can be modeled using the dedicated software GEANT4 [ 231 , 232 , 233 ].…”

Trends in reinforced composite design for ionizing radiation shielding applications: a review

“…Ott [7] noted that appropriate shielding materials for gamma and x-radiations must have a high magnetic permeability for them to take up the radiation fields adequately. Tishkevich et al, [8] showed that materials with huge atomic charge values have higher shielding efficiency against high-energy ions from the locus of direct ranges of particles.…”