22/10/2017
Start: 01:26
Run: 037

Stop: 11:01
Run: 039

List mode: 171022_0126_bck_*.dlt
Root file: 171022_0126_1101_bck.root

Observations:
1. The noise in 3He tubes has been effectively suppresed 
(compare figure of BRIKEN spectrum in attachment with similar
figures of previous runs)
2. The 252 Cf source used immediately before has activated
something as can be deduced from the change of rate
in the D4 detector compared to G7 (standing on the floor)
see picture below. The effective half-life of the activation is
T1/2=71.8min
(see figures in attachment)