โ Scribed by C.
No coin nor oath required. For personal study only.
over whether such is the case. Now Dr. Fermi has bombarded the element thorium in a similar manner and discovered two radioactive substances of thorium having periods of one and fifteen minutes during which they disintegrate to half their amount. These new products would be classed as isotopes of thorium or actinium.
A paradoxical action of gamma rays was reported by DR. R. A. MILLIKAN at the International Conference of Physics. He and his colleagues found that the higher the energy of a gamma ray the more it is absorbed. A record was made when the maximum energy of the gamma rays was measured as between twelve to thirteen million electron-volts. PROF. J. JOLIOT and his wife, the former Irene Curie, predict the artificial production of radioactive elements superior in intensity to radium and exceedingly useful in medicine. A very important characteristic of these new active elements is that when introduced into the body they will disintegrate without leaving a radio-active residue. Thus a new kind of cancer treatment is forecast, in which artificial radioactive substances produced cheaply can be introduced directly into the cancerous tissue to" do their work and then become harmless.
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