الوصفOne of the major projects undertaken by the International Atomic Energy Agency (IAEA) is a survey of the concentration of hydrogen and oxygen isotopes in water. The aims of this project are to study the circulation pattern of water vapour on a global scale and to measure the tritium concentration of rain water in different parts of the world which is necessary for the application of environmental tritium to local hydrological problems. The picture shows gas counting of tritium in the laboratory at IAEA headquarters. IAEA/April 1963/1182. Please credit IAEA
Photo - Positive
