Induced Radioactivity of Fluorine and Calcium

  title={Induced Radioactivity of Fluorine and Calcium},
  author={O. R. Feisch},
  • O. Feisch
  • Published 1 August 1935
  • Physics
  • Nature
IN an earlier paper1, I have shown that sodium and phosphorus become radioactive under bombardment with alpha rays, presumably corresponding to the creation of Al26 and Cl34 respectively. In the case of phosphorus, chemical separation of the active body, kindly carried out by Prof. S. Sugden, gave strong support to this picture. Between these two unstable isotopes lies a third one, P30, found by Curie and Joliot2. It was pointed out that another link of that chain, Na22, should be produced by… 
9 Citations
First Nuclear Reactions
The discovery by Rutherford in 1919 that \(\alpha \)-particles could induce nuclear reactions and transform isotopes and elements opened up the possibility to produce new isotopes in the laboratory.
Discovery of the Isotopes with 11 Z 19
Energy Levels of Light Nuclei (Z=11 to Z=20). II.
The experimental material on energy levels published from December 1, 1953 to February 1, 1957 is covered along with the 1954 energy level compilation STAP. M. Endt and J. C. Wuyver, Revs. Mod. Phys.
A table is presented of a complete list of the radioactive and stable isotopes, with a number of their salient features, as recorded in the literature or by private communications up to February
Otto Robert Frisch, 1 October 1904 - 22 September 1979
  • R. Peierls
  • Physics
    Biographical Memoirs of Fellows of the Royal Society
  • 1981
R. R. Frisch brought to physics the approach of a craftsman, not only in his love for music and his skill and taste as a pianist and a violinist, but in the use of language, which made him an outstanding expositor.


Artificial Production of a New Kind of Radio-Element
The latest experiments have shown a very striking fact: when an aluminium foil is irradiated on a polonium preparation, the emission of positrons does not cease immediately, when the active preparation is removed, as for an ordinary radio-element.
Dr. E. W. Washburn
DR. EDWARD WIGHT WASHBURN, who died on February 6 at the age of fifty-two years, was the chief of the Division of Chemistry of the U.S. Bureau of Standards at Washington. He was well-known to a wide