In this research, gamma radiation has been used to graft styrene and acrylic acid monomers onto marble (M) and granite (G) powder, with irradiation doses 30, 10 kGy, respectively. The grafted marble and granite powders were used as filler of epoxy composites. They added to an epoxy resin at 20, 60, and 100 wt% and then cured at room temperature. Ultrasonic velocities and attenuation measurements in epoxy composites at 4 MHz in the 25–300°C temperature range in addition to Fourier Transform Infrared (FTIR) analysis had been investigated. The ultrasonic compression wave velocity and the shear wave velocity measurements were performed using the pulse-echo technique, and then wecalculated elastic modulus, Young’s modulus, longitudinal and shear moduli, and Poisson’s ratio. In addition to attenuation at different temperatures of epoxy/granite composites, ultrasonic results indicated that the ultrasonic wave’s velocities V_L and V_s increased with the increase of (M, G) content and a linear relation was observed. Also, the attenuation of epoxy was stable and appeared to increase at temperature 385°C, while the addition M or G to epoxy composites increased the attenuation.

Percentage and radionuclides content in the brick material used in construction depends on the origin and the geological condition got from it. They makes manufacture and preparation of bricks used as building materials in Egypt of clay and rocks extracted from deposited sediments of Nile River. Aim of the study was to determine the radiation activity resulting from a different bricks kind, which manufactured from raw materials from the Nile River clay, used in the construction process in Egypt. In the present work, we have selected 20 samples of three types of bricks, clay brick (CB), making facade brick (MFB) and firebrick (FB), it has selected from different regions and plant in Egypt. It measured the activity concentration of 226Ra, 232Th and 40K in many brick under investigation using gamma ray spectroscopy system. Results showed that, the radium equivalent concentration (Raeq) calculated and compared well with the world reported values. As shown in the results, the mean values of radioactivity concentrations of 226Ra, 232Th and 40K for CB bricks, which represent the highest in many bricks in the present study with values (39, 38 and 199 Bq/kg), respectively.

This study explores the effects of gamma irradiation on the properties of polyvinyl chloride (PVC):(50 nm)/CeO₂:(10 nm)/TiO₂ nanocomposite films. Gamma irradiation significantly enhances the optical conductivity (σopt) of the films, signifying increased light‐to‐current conversion efficiency. This improvement is attributed to a reduction in the bandgap and increased light absorption induced by irradiation. X‐ray diffraction (XRD) analysis reveals a decrease in crystallinity due to disrupted atomic order within the nanocomposite. Williamson–Hall (W‐H) plots show a dose‐dependent reduction in crystallite size and a corresponding rise in lattice strain with increasing irradiation dose. Infrared (IR) spectroscopy suggests potential bond breaking of O‐H groups and modifications in C=O functional groups upon irradiation. The absorption coefficient and binding energy exhibit a nonmonotonic response with increasing dose, reaching an optimum at around 100 kGy. These findings demonstrate the potential of gamma irradiation for tailoring the optoelectronic properties of PVC:(50 nm)/CeO₂:(10 nm)/TiO₂ nanocomposites. This work paves the way for the development of next‐generation optoelectronic devices with optimized functionalities.