Half-life measurements of 87Rb by liquid scintillation counting.
The specific activity of natural 87Rb was measured by means of 4pibeta liquid scintillation counting in a two-photomultiplier-tube spectrometer. 3H-efficiency tracing was used together with the CIEMAT/NIST method to obtain the detection efficiency. For this purpose a new parameterization of the shape factor for the third forbidden non-unique beta-transition was performed. The hygroscopic behaviour of the salts used for sample preparation was studied. The half-life of 87Rb was found to be T1/2 = 4.967(32) x 10(10)y.
Kossert
K
K
Department 6.1, Physikalisch-Technische Bundesanstalt, Bundesallee 100, Braunschweig D-38116, Germany. karsten.kossert@ptb.de
D006207:Half-Life; D012414:Rubidium Radioisotopes / Q000032:analysis*; D012588:Scintillation Counting / Q000295:instrumentation / Q000379:methods*
D012414:Rubidium Radioisotopes