Nuclear and Radiation

The synthesized 4-hydroxy Coumarin was investigated for the purpose of developing a new chemical ?-radiation dosimeter. The compound was exposed to 60Co ?-radiation source at room temperature. The compound dosimeter exhibited good sensitivity to ?-radiation of dose less than 30 Gy and a fairly good linearity of response in dose range 0-25Gy. The present compound may be used as sensitive, and as well as cost-effective dosimeter in 0-25Gy ?-radiation environment.

This work is devoted to see how the phosphors concentration (N_P) effect on the band gap value in Light Dependent resistance (LDR) doped with phosphors. This effect is studied using visible light. The variation of the band gap with the different concentration is also studied in this work. In this work the dependence of the band gap on the phosphors concentration (N_P) and the magnetic field is discussed. We show that the gap width decreases with magnetic field approaching the critical value. The decrease in gap width has been calculated for (7 samples) Light Dependent Resistance (LDR) with different concentration ( N_P ) . From our results we found that the band gap in the light dependent resistance (LDR) doped with phosphors (P) depends not only on the donor’s concentration but also on the magnetic field, and the wave lengths of the visible light. The result of this work should provide useful guidance for the optical absorption in semiconductors.

The aim of this current article is to illustrate in detail Armenian relativistic formulas and compare them with Lorentz relativistic formulas so that readers can easily differentiate these two theories and visualize how general and rich our Armenian Theory of Special Relativity really is with a spectacular build in asymmetry. Then we are going behind this comparison and illustrating that build in asymmetry inside Armenian Theory of Special Relativity is reincarnating the aether as a universal reference medium, which is not contrary to relativity theory. We mathematically prove the existence of aether and we show how to extract infinite energy from the time-space or sub-atomic aether medium. Our theory explains all these facts and peacefully brings together followers of absolute aether theory, relativistic aether theory or followers of dark matter theory. We also mention that the absolute aether medium has a very complex geometric character, which has never been seen before. We are explaining why NASA's earlier "BPP" and DARPA's "Casimir Effect Enhancement" programs failed. We are also stating that the time is right to reopen NASA's BPP program and fuel the spacecrafts using the everywhere existing aether asymmetric momentum force.

The diffusion of slow electrons in Nitrogen ,Argon and Helium gases in uniform electric fields has been verified for ratios of electric field to pressure from 1.611 to 16.115,0.0322 to 0.3223 and 3.9131×10-3 t0 0.9767 (V/cm .Torr-1 ) respectively. These are calculations lead to a determination of the ratio of electron drift velocity to diffusion coefficient . By assuming a distribution in velocity of the electrons in the swarm, the Townsend energy factor KT and the mean electron velocity can be computed as a function of E/P, where E is electric field and P is the gas pressure, where the mean free path at unit pressure, the average energy loss per collision, and the gas kinetic cross section can be calculated. The results are presented in Figures forms. The obtained results appeared a good agreement with the experimental and theoretical data.

The occupational radiation doses for medical staff at the Sheri Kashmir Institute of Medical Sciences (SKIMS) Hospital's departments of diagnostic radiology, nuclear medicine, radiotherapy, cardiology, gastroenterology, radiological physics, and bioengineering were monitored and evaluated. To ascertain the status of their average yearly effective dosage and average cumulative lifetime exposure, 250 medical radiation employees were observed. The Radiation Safety Lab of the Department of Radiological Physics and Bioengineering at SKIMS was where the analysis for this study was completed. Based on their clinical responsibilities and expertise, the observed personnel were divided into two subgroups: technical professionals and physicians. Thermo luminescent dosimeters (TLD-BARC (CaSo4:Dy)) were used to measure the whole body doses in all categories of workers, with the exception of those in the cardiology lab and gastroenterology, for whom the TLD was worn under the lead apron (0.5millimeter lead thickness). Additionally, an extremities dosimeter was given to each of the three departments—nuclear medicine, cardiology, and gastroenterology. Radiological physics, nuclear medicine, radiation, cardiology, gastroenterology, BE, and SKIMS Medical College employees' annual average effective doses were found to be 0.26, 0.60, 0.18, 0.35, 1.37, 0.17, and 0.25 mSv, respectively. The average hand/extremity dose recorded by the department of nuclear medicine utilising the unsealed radioisotopes was 1.06mSv. Cardiology and gastroenterology, two departments that use fluoroscopic guidance for a variety of procedures, were also given an extra extremity dosimeter, and the average dosages were discovered to be 0.42 and 5.57 mSv, respectively. The measured annual dosage resulted in levels that were significantly lower than the international recommended occupational dose limit.

Radon is one of the most important radioactive elements which are released by natural decay of available uranium and radium in the ground. The presence of the gas is common in various drinking water sources. As a way of prevention, we have measured the activities of radon for sixty-four (64) drinking water samples collected from boreholes and hand-dug wells. This study was conducted during the dry season (December-January) of 2016. The samples were collected from sixty-four (64) water sources (boreholes and hand-dug wells). The concentration of radon was evaluated using solid state nuclear track detector LR-115 type II, with an active layer of 12 ?m on a 100 ?m clear base. The minimum radon concentration in the water sources was 30.17 Bq/m3 (hand-dug well) and the maximum amount was calculated as 115.33 Bq/m3(borehole). Based on the results, radon concentration of the drinking water sources was below the permitted levels of EPA and WHO guidelines. These activities do not present any health risk to the community.

Water is the essential element in creating and sustaining conditions for human life Cell of the organism, and the medium in which we live. Water is one of the most important natural elements in our cart Ground is the secret of life, and is one of the most important components of living matter. Water accounts for 63% of the human body weight (Average) and human muscles contain about 83% of it. The human body needs about 5.2 liters Daily of water, and gets this amount of food and drink. Water plays a key role in the chemical processes in the body, and rid of waste, and contributes to the regulation of body temperature process Sweating. Due to the importance of drinking water in the preservation of life on the one hand, water is exposed to pollution by Many pollutants, including microorganisms, minerals, organic substances and radioactive materials, on the other hand Which called for the issuance of standards for the acceptance of drinking water, whether global or local standards. The focus will be on this study on the radiological side [1]. Although Kuwait does not have natural drinking water resources such as wells or rivers, most bottled water companies are directed to seawater in desalination, or resort to drill coastal beach wells. The coastal beach wells, are wells drilled near the coast of sea at depths of up to 50 meters, and are extracted from it salty sea water, but it is free of pollutants and impurities, or can be taken directly from the sea and thus work is a comprehensive desalination of water and adding Minerals such as magnesium and calcium, in addition to ensuring that it is free of any bacteria or viruses and detect its radioactive contamination or ensure that the concentration of natural radionuclides are not exceeded the international limit in this drinking water, after that water treatment and the addition of ozone gas for sterilization, then the final stage is manufacturing conservation bottles and bottling water in different sizes and processing for sale to the consumers. In this study, the concentration of radon gas in different samples of bottled mineral drinking water companies was measured in State of Kuwait. Concentration of (222Rn) in Bottled Mineral drinking water varies from 1.02 Bq/L to 6.05 Bq/L with the average value of 2.97±1.44 Bq/L. From these results it can be concluded that the majority of drinking water is safe to use from the stand point of concentration of radon in them. Mean values of effective dose per liter and annual effective dose from radon ingested with drinking water for an individual consumer are 29.72 nSv/L and 21.69 ?Sv/y, respectively. So, the level of Radon concentration in Kuwaiti bottled mineral drinking water is below the permissible limits for health purposes to drink.

The aim of the present study is to investigate the rectal dose during three different radiotherapy techniques of cervical cancer. The study was carried out using a Anderson Rando female phantom. The thermo-luminescent dosimeter (TLD) capsules and detectors of rainbow dosimeter were employed for rectal and target volume dose determination. Several techniques of external beam radiation therapy such as two-field (AP-PA), three-field and four-field with equal applied dose were planned. During application of different radiotherapy techniques, the maximum dose received by rectum is due to the two-field technique. The results of two dosimetry types were compared with each other, In three-field, four-field equal applied dose, rectal dose was lower than tumor dose. This study showed that using TLD and rainbow dosimetry during radiotherapy could have a useful role as a predictor of choosing appropriate technique for preventing future rectal complications. Dose limitation to the rectum could possibly be achieved by using three-field and four-field techniques with equal tumor dose while maintaining a high dose to the tumor.

Paper in the work presents the first comprehensive and complete report on the concentration of on natural radioactivity measurements, other fissionable isotopes and the hazard parameters in the NORM samples from different marine environment Samples of the Arabian Gulf region (Beach Muddy/Sands, Arabian Gulf Water, Shells and Different types of Marine Fish) collected along the eastern coastline of the State of Kuwait. All samples were measured using gamma spectrometry technique, with high purity germanium detector. The results show that the average activity concentrations of 226Ra, 232Th and 40K, 137Cs and 60Co for Kuwaiti Environmental Marine Samples are lower than the worldwide average value. The worldwide average values (32, 45 and 420) for 226Ra, 232Th and 40K, respectively. The activity concentration of 226Ra, 232Th and 40K, 137Cs and 60Co for Kuwaiti Environmental Marine Samples ranged between [(0.18 - 10.43) Bq/kg with average of 3.26 ± 0.80 Bq/kg, (-0.23 – 3.63) Bq/kg with average of 1.15 ± 0.67 Bq/kg, (1.27 - 110.92) Bq/kg with average of 43.62 ± 1.7 Bq/kg, (0.50 - 10.61) Bq/kg with average of 3.11 ± 0.34 Bq/kg and (ND – 0.35) Bq/kg with average of 0.01 ± 0.01 Bq/kg] respectively. Marine Environment Samples of the Arabian Gulf region in Kuwait have been investigated. Samples were collected along the eastern coastline of the State of Kuwait. All samples were collected from different beach sites in Kuwait. These samples were collected randomly from different locations in these sites (from north to south along the eastern coastline of Arabian Gulf). According to the Kuwaiti samples, the estimated range for (Radium Equivalent Rate, External Hazard Index, Internal Hazard Index, Absorbed Dose, annual effective dose, Gamma Index, Alpha Index) is [(0.79 – 21.80) Bq/kg with average of 8.26 ± 1.90 Bq/kg, (0.00 – 0.06) Bq/kg with average of 0.02 ± 0.01 Bq/kg, (0.00 – 0.09) Bq/kg with average of 0.03 ± 0.01 Bq/kg,(0.36 - 10.68) Bq/kg with average of 4.04 ± 0.86 Bq/kg, (0.44 – 13.10) Bq/kg with average of 4.96 ± 1.06 Bq/kg, (0.00 – 0.08) Bq/kg with average of 0.03 ± 0.01 Bq/kg and (0.00 – 0.05) Bq/kg with average of 0.02 ± 0.00 Bq/kg], respectively. The estimated hazard parameters in all Kuwaiti samples are lower than the recommended limits for occupationally worker. From this study, it was noticed that the average activity concentrations of 226Ra series, 232Th series, 40K, 137Cs and 60Co for Kuwaiti Environmental Marine Samples are lower than the worldwide average value. Results obtained are discussed and compared with the international recommended data.

In this study, the aim is the treatment of phosphogypsum and phosphate sample collected in the senegalese chemical industries and actions of management for the valorization of the phosphogypsum. The treatment of phosphogypsum and phosphate show that naturally impurities are present in the samples and this chemical analysis of the treated of the phosphogypsum established improvement of the quality of it. The values observed of MgO, SO3, P2O5, in the phosphogypsum were 24.811%, 57.054% and 1.763% respectively and 35.166%, 0.741%, 53.225% in the sample phosphate if the device is calibrated with standards type mining. The toxic elements found in our study were Mercury, Lead, Cadmium, and Arsenic if we calibrated by standards of mining type, thier activity is low than limit detection of the device for the gypsum, while in sample phosphate, we find a very low quantity of Arsenic and Cadmium equal to 08,860 ppm and 48,380 ppm respectively, when we calibrated with soil type standards, the concentrations of Mercury, Lead and Cadmium are not detectable, while for Arsenic the value was 09,550 ppm for Phosphogypsum and 03,040 ppm for Phosphate. The major phases Alite (C3S), Belite (C2S), Aluminatetricalcic (C3A), and Tetra-calcium aluminoferrite (C4AF), and control ratios Lime Saturation Factor (LSF), Aluminium/Iron ratio (AR), and Silica ratio (SR) were measured. These experimental results shown that the C3S, C2S, C3A, C4AF, LSF, AR and SR contents fulfilled the requirement of the Jordan Standards and European Standards. The acidity of samples, was an unfavourable parameter for geotechnical and mechanical properties due to the impurities, The data show that the evolution of densities as a function of compaction energies was not analogous to that of sand, mainly because of the fragility of phosphogypsum crystals as the compaction energy increases, the crystals break and the fragments fill the inter-granular voids.