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

Detector: 90
Source: Am-241
Distance: 167.5mm
Start time: 13:06:55 15.03.2020
Stop time:  13:24:57 15.03.2020

file name: run030_xxxx.lmd
avrg. rate: 650Hz
dead-time:  7%