The source was positioned in a container of the wheel type, where the wheel turns inside the casing to move the source between the storage and irradiation positions.A wheel type radiotherapy device which has a long collimator to focus the radiation into a narrow beam.*Prices in US$ apply to orders placed in the Americas only.Prices in GBP apply to orders placed in Great Britain only.Locations with continuous and essentially stable sedimentary environments were found in both lakes between water depths of 9 and 26 m.We used several different dating techniques, including C, and paleomagnetic dating, to provide accurate and secured sediment chronologies.
Based on AMS Cs chronologies, but not confirmed with other independent dating methods that extent beyond the last 50 years.In the cleanup operation, topsoil had to be removed from several sites, and several houses were demolished.All the objects from within those houses were removed and examined.This technique exploits the injection of radioisotopes into the atmosphere, which occurred during atmospheric nuclear testing, mainly in the late 1950s and mid 1960s.It uses this injection as a marker to identify soil and sediment particles laid down at that time.The specific activity of the active solid was about 814 TBq·kg).While the serial number of the device was unknown, thus hindering definitive identification, the device was thought to have been made in the United States at Oak Ridge National Laboratory and was used as a radiation source for radiation therapy at the Goiânia hospital.The caesium chloride radioactive source is the blue rectangle, and gamma rays are represented by the beam emerging from the aperture.The activity of the source was 74 terabecquerels (TBq) in 1971.Prices in € represent the retail prices valid in Germany (unless otherwise indicated). Prices do not include postage and handling if applicable. The sedimentary environment, sediment characteristics and age-depth models of sediment sequences from Arctic lakes Revvatnet and Svartvatnet, located near the Polish Polar Station in Hornsund, southern Svalbard (77°N), were studied with a view to establishing a basis for paleolimnological climate and environmental reconstructions.The results indicate that catchment-to-lake hydroclimatic processes probably affect the transportation, distribution and accumulation of sediments in different parts of lakes Revvatnet and Svartvatnet.