Abstract
SINCE the discovery of the radioactivity of samarium by Hevesy and Pahl in 19321, several experimenters have examined the emitted radiations in detail2. It is well established that the main radiation consists of α-particles of range 1.13 ± 0.02 cm., and the experiments of Wilkins and Dempster3 indicate that these particles are emitted by the isotope of mass 148. In addition, however, a number of experimenters claim to have detected particles of longer range, and present some evidence which suggests that they are protons4. Thus Taylor and Dabholkar5, using the photographic technique, found particles, of longer range than the 1.1 cm. group, continuously distributed in range up to a maximum of 3.5 cm. of air and producing a grain-spacing characteristic of protons.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Hevesy and Pahl, Nature, 130, 846 (1932). Hevesy, Pahl and Hoseman, Z. Phys., 83, 43 (1933). Curie and Takvorian, C.R. Acad. Sci., Paris, 196, 923 (1933).
Curie and Joliot, C.R. Acad. Sci., Paris, 198, 360 (1934). Ortner and Schintlmeister, Z. Phys., 90, 698 (1934). Libby, Phys. Rev., 46, 196 (1934). Hoseman, Z. Phys., 99, 405 (1936).
Wilkins and Dempster, Phys. Rev., 54, 315 (1938).
Taylor, Nature, 136, 719 (1935). Mäder, Z. Phys., 88, 601 (1934).
Taylor and Dabholkar, Proc. Phys. Soc., 43, 285 (1935).
Powell, Occhialini, Livesey and Chilton, J. Sci. Instr., 23, 102 (1946).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
CUER, P., LATTES, C. Radioactivity of Samarium. Nature 158, 197–198 (1946). https://doi.org/10.1038/158197a0
Issue Date:
DOI: https://doi.org/10.1038/158197a0
This article is cited by
-
Half-life for alpha-decay of147Sm
Il Nuovo Cimento A (1992)
-
Der Nachweis seltenen α-Zerfalls mit Hilfe der Photoplatte
Experientia (1951)
-
Some More Lower Limits of Half-Lives for α-Decay
Nature (1949)
-
An Examination of Praseodymium, Neodymium and Samarium for α-Activity
Nature (1949)
-
Die photographische Emulsion in der Kernphysik
Die Naturwissenschaften (1948)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
