• DOI:10.1038/136220a0
• Corpus ID: 4122655

Induced Radioactivity of Fluorine and Calcium

@article{Feisch1935InducedRO,
  title={Induced Radioactivity of Fluorine and Calcium},
  author={O. R. Feisch},
  journal={Nature},
  year={1935},
  volume={136},
  pages={220-220}
}

• 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 bombarding fluorine with alpha rays. Since the periods of the three above-mentioned bodies decrease rapidly with atomic number, a very short period was anticipated for Na22. The search for this substance was unsuccessful, however, although periods so short as one tenth of a second would have been detectable by the method applied.