The present work contains some results of observations of neutron flux variations near the Earth’s surface. The Earth’s crust is determined to be a significant source of thermal and slow neutrons, originated from the interaction between the nuclei of the elements of the Earth’s crust and the atmosphere and α−particles, produced by decay of radioactive gases (Radon, Thoron and Actinon). In turn,...

Abstract In this study, samples of building material additives were analyzed for naturally occurring radioisotope activity such as uranium, radium, and radon. The radon exhalation the annual effective doses, also calculated. activities samples, determined using HPGe gamma spectrometry ionization detector. results used to calculate dose values by RESRAD BUILD code. concentration ranges between 9...

We use a nuclear technique based on the determination of detection efficiencies solid state track detectors CR-39 and LR-115 type II (SSNTDs) for alpha particles emitted from series uranium-238 thorium-232 in phytotherapeutic sample measurement densities registered these to assess activities due uranium-238; thorium-232; radon thoron samples preparations consumed by Moroccan adult patients. For...

The bulk of bricks made worldwide are burnt clay bricks, and this volume manufacture requires 230 - 242 million m3 agricultural land. This corresponds to 25,500 hectares rich farmland at a depth 1 meter. type exploitation will have substantial detrimental impact on national food security. According the present need, efficient use industrial waste, such as fly ash, is necessary. So it becomes ve...

A computer program named TRIAC written in MATLAB has been developed for track recognition and track parameters measurements from images of the Solid State Nuclear Track Detectors CR39. The program using image analysis tools counts the number of tracks for dosimetry proposes and classifies the tracks according to their radii for the spectrometry of alpha-particles. Comparison of manual scanning ...