Ein Universelles Verfahren Zur Stabilisierung Von Szintillations-Spektrometer-Anordnungen†

The gain of a scintillation-spectrometer can be held constant for long measuring times by including the spectrometer in a regulation circuit. All devices of this kind which have been described as yet are dependent on specific features of the spectrum and many situations arise where none of them can be used. The introduction of a pulsed source of light makes such stabilization devices universally applicable. This paper describes a light source and a suitable stabilization circuit with which a stability better than 0.5 per cent has been achieved for a 14 hour period, starting immediately after turning on the electronic circuits. The static and dynamic regulation properties are given as well as a method for evaluating all the effects due to the statistical character of the pulse height distribution produced by the light source and the photomultiplier.