measurement with old tennelec specAmps, do not use for efficiency!

Detector: 90
Source: Ba-133 strong source
Distance: 167.5mm
Start time: 13:28:42 15.03.2020
Stop time:13:38:16 15.03.2020

file name: run031_xxxx.lmd
avrg. rate: 2.7kHz
dead-time:  25%