исходный пост со ссылками:
Helmut Wabnig wrote in GeigerCounterEnthusiasts:
I managed to finish the USB port for my German Democratic Republic
Communist Party Secret Service STASI Staatssicherheitsdienst
Radiation Scintillation Sensor.
That unit contains a 100x100 mm Natrium-Jodid crystal.
(Why do you folks say "Potassium"?
Get rid of that bad habit, will you!)
The sensor produces about 350 counts per second here in my room.
That is about 21000 CPM. As a comparison, my Gamma-Scout with its
LND712 tube yields about 15 CPM. The average dose rate here is about
0,2µSv/h as measured with various geiger counters.
An old wrist watch put aside the sensor drives the hartbeat up
for about 3000 CPM, while the Gamma-Scout stays quiet
and does not seem to react at all.
The question arouses: what to do with such a super sensitive
equipment? I am not going to do secret observations, because
I don't have the radioactive marker substances which the devilish
communists used on civilians:
Probe into that book here: