MULTIPLE SCATTERING OF ELECTRONS AND POSITRONS IN NITROGEN
The momentum dependence of multiple scattering and the positron-electron differences in dependence were investigated. A low-turbulence Wilson chamber was designed, in which the scattering could take place and be photographed. Radioactive sources providing electrons and positrons simultaneously were prepared. Since the chamber was completely automatic, a large number of tracks could be recorded in a reasonable time. N gas was used as the scattering medium. The films were then examined on a specially constructed scanner-comparator. The coordinates of successive points on satisfactory tracks were measured by the comparator and automatically punched out on IBM cards. The multiple scattering, after a considerable number of corrections are applied, is found from the deviations from the estimated unscattered path. Of the tracks measured by the comparator, 4537 were used in the analysis, 2650 were of electrons and 1887 were of positrons. Best-fit curves were computed and compared with the theories of Moliere, Williams, Bothe, Goudsmit and Saunderson, and Snyder and Scott. It was concluded that the theory of Williams with the limiting angles due to H. A. Bethe best fitted the experimental results. A study of the positronelectron differences strongly suggests that the difference exists but is of the order of only a few percent. (M.P.G.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-000905
- OSTI ID:
- 4154644
- Resource Relation:
- Other Information: Thesis. Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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