Hostname: page-component-586b7cd67f-tf8b9 Total loading time: 0 Render date: 2024-11-23T15:46:49.488Z Has data issue: false hasContentIssue false
  • English
  • Français

The Intensity of the γ-Rays emitted by the Active Deposit of Thorium

Published online by Cambridge University Press:  24 October 2008

F. Oppenheimer
Get access Rights & Permissions [Opens in a new window]

Extract

1. Ellis(1) has proposed energy level systems for the bodies of the Thorium series, but the values of the γ-ray intensities forming the basis of this system fail to account satisfactorily for the total energy of the γ-rays emitted by Th C and its products. This is a serious discrepancy which needs examination. Since the publication of these level systems, we have obtained new values for the intensities of the γ-rays from Th C and Th Pb. The details of these measurements are given in the second part of this paper. These γ-ray intensities are, of course, deduced from the intensities of the discrete β-groups by dividing by the appropriate internal conversion coefficient. The changes which we have made in the γ-ray intensities are due first to revised values of the β-ray intensities from Th Pb and secondly to a revised set of values of the internal conversion coefficient (2). We have not however found it necessary to make any change in Ellis and Mott's (3) allocation of lines to dipole or quadripole type. The contributions of the two factors are made clear in Table I.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 32 , Issue 2 , May 1936 , pp. 328 - 335
Copyright
Copyright © Cambridge Philosophical Society 1936

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

(1)Ellis, , International Conference on Physics,London (1934).Google Scholar
(2)Mott, , Taylor, , Hulme, and Oppenheimer, , Proc. Roy. Soc. (in the press).Google Scholar
(3)Ellis, and Mott, , Proc. Roy. Soc. A, 139 (1933), 339.Google Scholar
(4)Gray, . Unpublished.Google Scholar
(5)Shenstone, and Schlundt, , Phil. Mag. (6), 43 (1922), 1039.Google Scholar
(6)Skobelzyn, , Comptes rendus, Paris, 194 (1932), 1486.Google Scholar
(7)Gamow, , Proc. Roy. Soc. A, 146 (1934), 217.Google Scholar
(8)Lewis, and Bowden, , Proc. Roy. Soc. A, 145 (1934), 235.Google Scholar
(9)Ellis, , Proc. Roy. Soc. A, 143 (1934), 350.Google Scholar
(10)Henderson, , Proc. Roy. Soc. A, 147 (1934), 572.Google Scholar
(11)Gurney, , Proc. Roy. Soc. A, 112 (1926), 380.Google Scholar