Abstract We report the gamma-ray shielding properties of five different lithium silicate glasses based on (40 − x ) Li 2 O–10Pb 3 O 4 –50SiO nominal composition. Transmission factor values and some basic parameters such as linear ( µ mass attenuation coefficients / ρ ), half-value layer, tenth value mean free path (MFP) investigated glass samples are determined in a large photon energy range. U...

This study aimed to perform an extensive characterization of a 74.75TeO2–0.25V2O5–(25 − x)B2O3-xNd2O3 glass system with (x = 0, 0.5, 1.0, and 1.5 mol%) for radiation shielding properties. Linear mass attenuation coefficients were determined using Phy-X PSD software compared the simulation Monte Carlo MCNPX (version 2.7.0). Half value layer, mean free path, tenth effective atomic number, exposur...

The experimental determination of the carrier multiplication (CM) time constant is complicated by the fact that this process occurs within the initial few hundreds of femtoseconds after excitation and, in transient-absorption experiments, cannot be separated from the buildup time of the 1p-state population. This work provides an accurate theoretical determination of the electron relaxation life...

The Advanced CCD Imaging Spectrometer (ACIS) on the Chandra X-ray Observatory is suffering a gradual loss of low energy sensitivity due to a buildup of a contaminant. High resolution spectra of bright astrophysical sources using the Chandra Low Energy Transmission Grating Spectrometer (LETGS) have been analyzed in order to determine the nature of the contaminant by measuring the absorption edge...

Abstract Gamma-ray shielding properties of eight different metallic glasses based on Cu x Zr100- : = 35 (Cu35Zr65) ? 70 (Cu70Zr30) were determined using Monte Carlo simulations and Phy-X/PSD software. A typical gamma-ray transmission setup has been modeled in MCNPX code. The general trend the linear attenuation coefficients ( ? ) was reported as Cu35Zr65 < Cu40Zr60 Cu45Zr55 Cu50Zr50 Cu55Zr45...

The coconut dust gypsums were fabricated and investigated through shielding radiation properties, energy absorption buildup factor (EABF), exposure (EBF). mass attenuation coefficient (mm) was by using the Compton scattering technique at 662 keV theoretical values of coefficients computed WinXCom software program different photon energies from 1 - 100 GeV. EABF EBF Geometric Progression (G-P) f...

Absorption of ultraviolet light energy by nitrogen dioxide results in its dissociation into nitric oxide and an oxygen atom. The oxygen atoms, for the most part, react with atmospheric molecular oxygen (O2) to form ozone (O3). In general, nitric oxide will react with ozone to reform nitrogen dioxide, completing the cycle. A buildup of ozone above the equilibrium concentration defined by the rea...