A position sensitive germanium detector for the measurement of angular deviation of annihilation radiation

16th International Conference on Positron Annihilation

Löwe, Benjamin^1 ; Reiner, Markus^2 ; Egger, Werner^1 ; Hugenschmidt, Christoph^2 ; Dollinger, Günther^1

Universität der Bundeswehr München, Institut für Angewandte Physik und Messtechnik (LRT2), Werner-Heisenberg-Weg 39, 85577 Neubiberg, Germany^1

Technische Universität München, FRM II, Lichtenbergstr. 1, 85747 Garching, Germany^2

关键词: Analogue to digital converters;    Angular correlation of annihilation radiations;    Annihilation radiations;    Coincidence Doppler broadening spectroscopies;    Data acquisition system;    Planar germanium detector;    Position sensitivity;    Position-sensitive germanium detectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/443/1/012098/pdf
DOI  :  10.1088/1742-6596/443/1/012098

来源: IOP

【 摘 要 】

To improve electron momentum sensitivity in Coincidence Doppler Broadening Spectroscopy (CDBS) measurements it is envisaged to measure the angular correlation of annihilation radiation along with the energy of both annihilation photons. For this purpose two position sensitive 36-fold pixelated, planar germanium detectors will be utilized. The position sensitivity of one of those detectors has been tested with a collimated gamma source. A data acquisition system consisting of 37 sampling analogue-to-digital converters with PC based online/off-line processing has been installed. A position sensitivity of 1.6 mm has been achieved.