SATELLITE PEAKS IN HIGH RESOLUTION ALPHA PARTICLE SPECTRA OF DECAY CHAIN MEMBERS MEASURED WITH SILICON SURFACE BARRIER DETECTORS
The origin of satellite peaks accompanying some of the alpha peaks in spectra from decay chain members measured with surface barrier detectors is discussed. It is shown by the example of the 228-Th series that these satellite peaks stem from alpha particle decay of nuclei which have been recoil implanted through the Au surface barrier layer of the detector and into the Si crystal. The energy separation between a given alpha- particle peak and its satellite peak corresponds to the fraction of energy lost by the recoiling atom to charge carriers in silicon. This fractional loss of energy for members of the 228-Th series has been measured. Results are consistently lower than values obtained from the theory of Lindhard et al.
Bibliographic Reference: NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH, VOL. 219 (1984), PP. 339-346
Record Number: 1989122083400 / Last updated on: 1987-01-01
Available languages: en