Hostname: page-component-cd9895bd7-mkpzs Total loading time: 0 Render date: 2024-12-28T14:47:13.306Z Has data issue: false hasContentIssue false
  • English
  • Français

The relative absorbing powers of the L-levels for radiation of varying wave-length

Published online by Cambridge University Press:  24 October 2008

H. W. B. Skinner
H. W. B. Skinner
Affiliation:
Coutts-Trotter Student of Trinity College
Get access Rights & Permissions [Opens in a new window]

Extract

1. Changes in the relative intensities of the lines in the fluorescent L-spectrum of Cerium excited by radiation of various wave-lengths have been observed.

2. These results imply a change in the relative absorbing powers of the three L-levels as the wave-length of the absorbed radiation diminishes from a value just below the absorption wave-length of the L-levels to a value considerably below. The absorbing power of the LI-level becomes increased relative to the absorbing powers of the other L-levels as the wave-length diminishes. The results agree with those published by H. Robinson in a recent paper.

3. These results imply a breakdown of the law that μ/λ3 is a constant (where μ is the absorption coefficient of X-rays of wave-length λ) as applied to the individual L-levels of an element.

4. A comparison is made between the above results, and some results on the relative absorbing process of the L-levels obtained by Ellis and Skinner from β-ray spectra.

Type
Research Article
Information
Mathematical Proceedings of the Cambridge Philosophical Society , Volume 22 , Issue 3 , 20 September 1924 , pp. 379 - 392
Copyright
Copyright © Cambridge Philosophical Society 1924

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

* Ellis, C. D., Proc. Camb. Phil. Soc., vol. 21, p. 121 (1922)Google Scholar. (See also further Ellis, and Skinner, , Proc. Roy. Soc., A., vol. 105, p. 185 (1924))CrossRefGoogle Scholar.

† I am informed by Dr Ellis that Dr D. Coster also had the idea, about the same time, of comparing the results obtained from β-ray spectra with those of experiments on X-rays to be tried.

* See e.g. Duane, and Patterson, , Proc. Nat. Acad., vol. 6, p. 477 (1920)CrossRefGoogle Scholar; Dauvillier, A., Comptes Rendus, t. 178, p. 477 (1924)Google Scholar.

† Robinson, H., Proc. Roy. Soc., A., vol. 104, p. 445 (1923)CrossRefGoogle Scholar.

* Phil. Mag., vol. 42, p. 419 (1921)Google Scholar.

* Proc. Roy. Soc., A., vol. 104, p. 248 (1923)Google Scholar.

* Einstein, , Phys. Zeit., vol. 18, p. 121 (1917).Google Scholar

* See e.g. Ellis, and Skinner, , Proc. Roy. Soc., A., vol. 105, p. 165 (1924).CrossRefGoogle Scholar

† Ellis, and Skinner, , Proc. Roy. Soc., A., vol. 105, p. 185 (1924)CrossRefGoogle Scholar.

‡ See the last quoted paper, p. 185, where the possibility of the “radiationless” ejection of an electron, from the radioactive atom, as suggested by Rosseland, is discussed.

* See the last quoted paper of Ellis and Skinner, p. 187.

* It should be stated that for the purpose of drawing the diagram we have assumed, without any direct evidence in the region of such short wave-lengths, that the λ3 law still holds for the L-levels taken as a whole.