Zeitschrift für Physik

, Volume 158, Issue 3, pp 347–358 | Cite as

Zerfallsschema und β-Spektrum des MsTh1 (Ra228)

  • Gerhard Goetze


Theβ-spectrum of MsTh1 (Ra228) has been measured in a proportional counter in 2π — and in 4π-geometry. Comparison of these measurements shows that there are no conversion electrons. Theβ-decay of MsTh 1 therefore leads in all cases to the ground level of MsTh2. The Kurie plot is straight from 15 keV up to the upper energy limit ofE0=55±3 keV (logft=5·6). The result has been checked by a search for photons emitted by the MsTh1. Noγ-rays and no X-rays have been found. The measurements had to be made with a relatively large amount of natural Ra226 in the sources. — The results do not agree with those ofLecoin, Perey, Teillac andRiou, who proposed a complex decay sheme for MsTh1.


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Copyright information

© Springer-Verlag 1960

Authors and Affiliations

  • Gerhard Goetze
    • 1
  1. 1.Physikalischen Institut der Universität MarburgDeutschland

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