- close operating surface of detector by moving the absorbing screen (see Fig. 1) in the top position. Place detector of instrument directly above surface to be surveyed at (3-5) mm distance;
- place the instrument under any certainly clean area of the surface (or place the dosimeter in air at not less than 1 m distance from the floor surface, ground and any surrounding objects);
- place the instrument by the back side directly above the surface to be surveyed, in a way that the distance between detector and surveyed surface was not more than (1-2) mm;
- cover the surveyed surface with a thin paper sheet used for printing on laser or ink printers;
The bank has no idea where they could have obtained the radioactive money, and suspect that it came from an organization working with nuclear materials, said the president of the Association of Regional Banks, Anatoly Aksakov. He also said the money could have been received from a medical institution that works with X-ray equipment.
It is not rare to find radioactive money in Moscow. In the summer of 2010, 380 notes of various denominations were contaminated with Iodine-131. This isotope’s half-life is eight days, and the money was not considered dangerous to people.
Because all the notes on that occasion were discovered in just one city, experts assumed that they were put into circulation locally.
But small amounts of radioactive money appear regularly. In the last 10 days of September, Radon radiation specialists discovered several “dirty” notes. They were all destroyed.
“For now, I do not feel that my health has deteriorated in any way,” Kryzhanovskaya said. “But I am constantly nervous. I am very worried.”
The pensioner is also worried when her money will be returned, and aims to write to the State Duma to get her money back and to get compensation for moral and physical damages.