Chronology of Milestone Events in Particle Physics - ELLIS 1927B
Chronology of Milestone Events in Particle Physics

ELLIS 1927B

Ellis, C.D.; Wooster, W.A.;
Average Energy of Disintegration of Radium E
Proc. Roy. Soc. A117 (1927) 109;

Abstracts
The experiments described in this paper show that the average energy of disintegration of Ra E is about 350000 volts, and this energy is liberated in such a form that the major portion, 344000 volts, is stopped by 1.2 mm of lead and the remainder has an absorption coefficient in lead of 5.9 cm -1. The interpretation of this result is as follows. The main energy is due to the disintegration electrons, and the small extra radiation is probably continuous -radiation of a relatively hard type, emitted by a few of the disintegrated electrons which suffer close collisions with the planetary electrons in their escape from the atom. These results have been confirmed by independent methods. The authors generalize the results obtained for RaE to all ray bodies, thereby settling a long controversy. We must conclude that in a ray disintegration the nucleus can break up with emission of an amount of energy that varies within wide limits. A simple hypothesis is put forward to explain this curious result. (Science Abstracts, 1928, 664. A. B. W.).

Accelerator SOURCE Detectors IONIZATION, CALO

Related references
More (earlier) information appears in
Proc. Camb. Phil. Soc. 22 (1925) 400, 849;
C. D. Ellis and W. A. Wooster, Nature 119 (1927) 563;

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Further confirmation that the spectrum is continuous.
    
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