Abstract
EXPERIMENTS recently carried out in this Institute1 have shown that, by bombarding silver disks with beams of ions of neon isotopes obtained from a high-intensity mass-spectrograph2,3, it is possible to prepare targets, containing the separated neon isotopes, that are suitable for certain investigations in nuclear physics. Due to the high energy of 60 keV., the ions penetrate into the silver surface to a depth of about one hundred atomic diameters, and to this depth a high concentration of neon atoms can be obtained. The experimental results (loc. cit.) indicate that a maximum concentration is approached when the surface has been hit by about 6 × 1016 ions per cm.2, corresponding to the collection of 2 μ gm. of neon per cm.2, if all the neon atoms remain in the surface.
Similar content being viewed by others
References
Brostrøm, K. J., Huus, T., and Koch, J., Nature, 160, 498 (1947).
Koch, J., and Bendt-Nielsen, B., Kgl. Danske Vid. Selsk. Mat.-Fys. Medd., 21, 8 (1944).
Koch, J., Phys. Rev., 69, 238 (1946).
Franck, J., Phys. Rev., 70, 561 (1946).
Daunt, J. G., Probst, R. E., Johnston, H. L., Aldrich, L. T., and Nier, A. O., Phys. Rev., 72, 502 (1947).
Daunt, J. G., Probst, R. E., and Johnston, H. L., J. Chem. Phys., 15, 759 (1947).
Loeb, L. B., "Processes of Electrical Discharges in Gases" (J. Wiley and Sons., New York).
Bohr, N., Kgl. Danske Vid. Selsk. Mat.-Fys. Medd. (in the press).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
KOCH, J. Mass-Spectrographic Separation of Isotopes of Gaseous Elements. Nature 161, 566–567 (1948). https://doi.org/10.1038/161566b0
Issue Date:
DOI: https://doi.org/10.1038/161566b0
- Springer Nature Limited
This article is cited by
-
Penetration of hydrogen ions H1 + in to the surface of stainless steel
Soviet Atomic Energy (1965)
-
Electric absorption of a gas by a metal with a vaporizing surface
Atomic Energy (1958)
-
Production of Electromagnetically Enriched Stable Isotopes at Harwell
Nature (1955)
-
Reduction of Optical Reflectivity of Glass Surfaces Resulting from Ion Bombardment
Nature (1949)
-
Gamma-Rays from Proton Bombardment of Separated Argon Isotopes
Nature (1948)