Configuration I

The 40 germanium detectors are placed at 27 cm from the target position and cover a total solid angle of 10% corresponding to a total absolute photopeak efficiency of 3% at a gamma-ray energy of 1332 keV.
For the ⁶⁰Co source the Compton suppressed spectra have a mean P/T ratio of 60--65 %.
The average energy resolution at 1332 keV is better than 2.3 keV and the average relative efficiency about 82%..
A BGO multiplicity filter, made of 80 BGO cristals acts as a active collimator and measures the total energy and multiplicity of the gamma cascade.