Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

At the superconducting LINAC ELBE [1] at Research Centre Dresden-Rossendorf the new facility for Gamma-induced Positron Spectroscopy (GiPS) is successfully running [2] and first measurements were done. Two AMOC (Age Momentum Correlation) spectrometers (each consisting of a barium fluoride timing detector and a high purity germanium detector for measuring the energy) and a detector setup for Coincidence Doppler Broadening Spectroscopy allow to measure standard positron techniques simultaneously.
Influences from the surroundings (e.g. randomly scattered photons) disturb the recorded energy and lifetime spectra (increase of background, several peaks in lifetime spectra). Therefore it is of great importance to avoid such disturbing influences and to get clear and corrected spectra.
Recent efforts to optimize the setup and to eliminate the negative influences of the surroundings are presented. Selected results of first measurements with GiPS show the great potential of this unique facility.