- Access by Xinjiang University
On the Half-Lives of Potassium, Rubidium, Neodymium and Samarium
Phys. Rev. 48, 151 – Published 15 July, 1935
DOI: https://doi.org/10.1103/PhysRev.48.151
Abstract
The long apparent half-lives of K, Rb and Nd are in striking disagreement with theory. To relieve this discrepancy, at least in part, the suggestion has often been made that their activities are due to isotopes of small abundance, having half-lives small in comparison with the apparent ones. Using data on the relative abundance of the elements, it is shown that the half-life of the active fraction of K is greater than years, and that the active fractions of Rb, Nd and Sm have half-lives greater than years. It is pointed out that these activities may be caused by small radioactive fractions of well-known isotopes; RaD and stable Pb(210) constitute a similar case. Data are presented which show that it is possible for the active portions of Nd and Sm to be genetically connected.
References (12)
- Hevesey, Pahl and Hosemann, Zeits. f. Physik 83, 43 (1934)
- Bearden and Kanne, Phys. Rev. 47, 639 (1935) Ortner and Schintlmeister, Zeits. f. Physik 90, 698 (1934)
- Beck and Sitte, Zeits. f. Physik 86, 105 (1933) Fermi, 88, 161 (1934)
- Hevesy and Logstrup, Zeits. f. anorg. Chemie 171, 1 (1929) Hevesy, Seith and Pahl, Zeits. f. physik. Chemie, Bodenstein-Festband 309 (1931) Biltz and Ziegert, Physik. Zeits. 29, 197 (1928)
- Hevesy, Nature 135, 86 (1935)
- Ruark, Science Leaflet 7, 16 (1934) Gamow, Nature 133, 833 (1934)
- Aston, Nature 133, 869 (1934)
- Klemperer, Proc. Roy. Soc. A148, 638 (1935)
- Hevesy, Chemical Analysis by X-Rays and its Applications, McGraw-Hill, p. 277
- Libby, Phys. Rev. 46, 196 (1934)
- Libby, [10] Lyford, Thesis, The Johns Hopkins University, 1934 Hevesy, Pahl and Hosemann, [1] Hertzfinkiel and Wroncberg, Comptes rendus, 199, 133 (1934)
- Goldschmidt and Thomassen, Kristiania Videnskapsselskapet Skrifter, I, Klasse, No. 5 (1924)