High voltage x-rays have been used to redetermine the thresholds for the photodisintegration of beryllium and deuterium nuclei, giving 1.627±0.010 Mv and 2.183±0.012 Mv, respectively. The ratio of the two cross sections (
This paper describes an attempt to polarize a beam of 0-rays by transmission through two magnetized iron foils, the first being regarded as the polarizer and the second as the analyzer. Radium was used as the source of electrons and a Geiger counter to give the number penetrating both foils with varying angles between their directions of magnetization. The data, representing the transmission of some quarter of a million electrons, give no evidence of such polarization.
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