Efficiency calibration in the lab

Detector: GEM1800 - 90 deg
Source: 210Pb
Distance: 167.5mm
Start time: 11:04:03 - 30.04.2021
Stop time:  11:53:59 - 30.04.2021

file name: e127b_run0006.lmd
avrg. rate: 50Hz
dead-time:  1%

Now with blocking gate to get rid of multiple triggers.
Dead time determination using: adt/bdt

Threshold at ~20keV

Last seconds of run may not be usable: DAQ node2 has been deactivated shortly by mistake.