[aprssig] APRS Radiation sensor
alw.k9si at gmail.com
Thu Mar 24 09:53:14 CDT 2011
The Geiger Mueller detector is not the only way to detect ionizing
radiation or necessarily the best way. We might consider some sort of
scintillation counter that uses the principle of a weak flash of light
generated when a particle passes through certain media. Then this light
flash was amplified by a photomultiplier tube in the scintillation counter.
As I vaguely recall from growing up as a science nerd in the 1950's, the
scintillation counter was considered the ultimate in radiation detectors for
field and lab work, costing at least twice what the Geiger counters of the
time cost. However, the scintillation detector itself could be very
inexpensive, so much so that they were offered as premiums in cereal boxes.
(I remember sitting in a dark closet for hours gazing into one of these
hoping to see the passing of a cosmic ray.)
Since photo detectors are far more advanced than they were sixty years
ago, it seems to me to be an obvious avenue to pursue.
P.S: C.P.M. or counts per minute is a meaningless term without a volume or
at least an area term. One needs to know is this per cubic centimeter or
> All Geiger counters work on the same principle. When a particle enters
> tube it
> ionises the gas and generates a spike. Counting spikes per minute
> determines the radioactivity rate in CPM and that's what you want to
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