Abstract
The ratio of longitudinal polarization values of Tl204 and P32 β-particles was measured by the method of double scattering. The result obtained is P(Tl204)/P(P32)=0.993±0.036 at 540 keV.
The low specific activity of the available Tl204 sources caused a considerable depolarization ofβ-particles by scattering in the source. The influence of depolarization was eliminated by using sources containing both nuclei in a chemical compound. The ratio of polarization values can then be calculated from the time dependence of the scattering asymmetry, as the half-lives of Tl204 and P32 differ considerably. An estimate is presented of the influence of inelastic scattering processes in the source on electron depolarization.
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Herrn Prof. Dr. O.Haxel und Herrn Dr. J.Heintze danken wir für Anregung und Förderung dieser Arbeit. Zu Dank verpflichtet sind wir ferner den Herren cand. phys. R.Löhken, G.Ackermann und W.Gramm für ihre Hilfe bei der Durchführung der Messungen und bei der Präparatherstellung. Das Bundesministerium für wissenschaftliche Forschung hat die Arbeit durch Sachmittel unterstützt.
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Rebel, H., Schatz, G. & Bühring, W. Relativmessung der Elektronenpolarisation beimβ-Zerfall: Tl204 und P32 . Z. Physik 180, 392–406 (1964). https://doi.org/10.1007/BF01380524
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DOI: https://doi.org/10.1007/BF01380524