1946 May 2 1, in the experiment, he accidentally dropped a hemispherical beryllium on another, and quickly triggered a critical reaction (the core of the sphere is plutonium). Scientists in his lab witnessed the "blue light" emitted by air ionization and felt a "heat wave" coming. Slotin reacted quickly and then rushed out of the lab. He hurried to the hospital, but to no avail, he died nine days later.

2. Maria Curie (1867- 1934) died of radiation exposure.

On July 1937, Madame Curie died of illness. She eventually died of pernicious anemia. She created and developed radiation science all her life, studied strongly radioactive materials fearlessly for a long time, and finally contributed her life to this science.