gamma-rays emitted from the ground surface relate to the primary mineralogy and geochemistryof the bedrock, and the secondary weathered materials. this information can contribute significantly to anunderstanding of the geochemical and pedogenetic history of a region. the main aim of this paper was to study the relationship between ground gamma-ray data and basement geochemistry in the lese catc...

background: natural radioactivity, though natural requires concentration monitoring, especially for the health/ environmental checks of the populace. materials and methods: the activity concentrations of 40k, 238u and 232th in the waters from wells with depths ranging between 141.0 - 214.0 feet were randomly sampled and determined from 20 locations in ago-iwoye town in south western, nigeria. r...

Neutronics calculations have been performed of the MYRRHA ADS Reactor with a thorium-based fuel mixture, using simulation programs MCNPX (Waters, 2002) and Geant4 (Agostinelli, 2003). Thorium is often considered for systems, this first evaluation possibilities thorium based fuels reactor design which has developed in detail. It also extends application widely-used program to geometry thorium. A...

This paper includes the measurement of concentrations natural radioactive isotopes 238U, 232Th, and radiation dose rates for selected areas Wasit province.GR-460 system has been used radiological survey operations, it is a portable system, installed inside minibus there Sodium Iodide Detector (NaI), that ability to measure in (ppm) unit µR/h unit. The results showed absence any significant incr...

High concentrations of natural radionuclides in building materials can result in high dose rates indoors, from both internal and external exposure. In dose calculations, the main radionuclides of interest are 226Ra, 232Th and 40K. Usually much attention is paid to 226Ra due to 222Rn exhalation and the subsequent internal exposure. Other radionuclides of the uranium series such as 238U and 210Pb...

Usually, phosphate deposits contain 238U and 232Th in addition to their decay products. Due to their different pathways in the environment, the 238U/232Th activity concentration ratio usually found to be greater than unity in phosphate sediments. The presence of these radionuclides creates a potential need to control exposure of workers in the mining and processing activities of the phosphate m...

Doğada yaşayan tüm canlılar sürekli olarak doğal ve yapay radyasyon kaynaklarından yayınlanan iyonlaştırıcı radyasyona maruz kalmaktadır. Bu nedenle, yaşam alanları ziyaret edilen bölgelerde radyoaktivite düzeylerinin belirlenmesi önemlidir. çalışmada, Rize ili İkizdere ilçesine bağlı İkizdere-İspir karayolu üzerinde bulunan Ovit Dağbaşı Gölünden alınan su örneklerinde 226Ra, 232Th 40K konsantr...

The radioactive background of the eastern side Lesvos Island in Greece, an island rich natural radioactivity, was studied by means gamma ray spectroscopy. Dose rates and concentrations radionuclides (232Th series, 226Ra 40K) 137Cs were measured in-situ laboratory, respectively. A total twenty soil samples ten beach sand collected processed according to IAEA protocol. For measurement dose rate d...