Ana María Cetto Atomic Energy Agency (IAEA) in Vienna, Austria. She has also been director of the Faculty of Sciences at UNAM, as well as a professor and researcher at the same institution. Ana Maria Cetto was Council member of the Pugwash Conferences when the International organization received the Nobel Peace Prize in 1995. Being Deputy Technical Director of the International Atomic Energy Agency, she was also participant of the Nobel Peace Prize in 2003. In 2003, she was named "Woman of the Year" and several other distinctions as member of the Third World Academy of Science (with headquarters in Italy), the Mexican
Uses of radioactivity in oil and gas wells high energy gamma rays. The attenuation of these gamma rays gives an accurate measure of formation density; this has been a standard oilfield tool since 1965. Another source is americium berylium (Am-Be) neutron source used in evaluation of the porosity of the formation, and this has been used since 1950. In a drilling context, these sources are used by trained personnel, and radiation exposure of those personnel is monitored. Usage is covered by licenses from International Atomic Energy Agency (IAEA) guidelines, SU or European Union protocols, and the Environment Agency in the UK. Licenses are required for access, transport, and