DATE: 2022-01-31
TIME: 16:39UTC

Found yesterday a nice volcanic rock in my backyard. Never noticed it!
It's quite large and also a little bit radioactive, as expected.
I've measured it with the SBT-11 probe, that is alpha sensible and
it gave me 82CPM (where 10/30 is the background) and next with the
Anri 01 Sosna, that is Beta and Gamma sensitive only but the 4 
probes SBM-20 generates a large surface than the little SBT11 pancake.
Results rised up to 117CPM of Beta+Gamma and about 60CPM of Gamma only
(plus background obviously).
It is quite a nice rock, it was given as a present to an uncle by a man
from Naples, to use it in front of a fire place to heat up and use next
in the bedroom, when at time there was no heating system but a stove...
my father told me.

Ok, so... now I put that stone into the acquarium and fishes seems 
to enjoy it very much. 
I also want to measure radioactivity out of the acquarium
to see if glass and water blocks all the beta particles and some 
gamma rays. 

I think that's all for today.

Have a nice life!