The radioactive processes are spontaneous and uncontrollable, and are entirely unaffected by physical and chemical agencies.
Radioactivity And Radioactive Substances by James Chadwick (1921), Chapter 1, p. 5
The radioactive processes are spontaneous and uncontrollable, and are entirely unaffected by physical and chemical agencies.
Radioactivity And Radioactive Substances by James Chadwick (1921), Chapter 1, p. 5