On the other hand, simply climbing in altitude gives you less atmosphere above you to protect you from solar radiation. For example, in Denver,
Colorado at an elevation of 5000 feet, you can expect background radiation around 35 uR/hr. It isn't dangerous and it's more than anything I've
measured just driving around.
35uR/hr would equal 122.5cpm on that detector.
That is what you would call…….Um……. Normal!!!!!!!!
What a shocker...................!!!!!!!!!!
And next time, he shouldn’t sit a alpha/beta window right on a rock because granite and other rocks normally have some radioactive material in them.
So, if there is any alpha/beta emitters in the rock it will push up the reading.
And just after a radon rainout, you will also see a higher alpha/beta reading from any exposed surfaces because of the decay products breaking down
that was deposited by the radon rainout.
And another thing that has also got me is….. Since they haven’t been able to detect any increase in radiation in the US after the disaster, people
are now trying to say that “Normal Geiger counters are not capable of detecting that type of radiation. That is why you are not detecting the
So, they are basically saying, “Don’t believe the equipment in front of your eyes, believe me!”
What utter freaking BS!!!!!!!!
The decay products from the reactor emit gamma rays which is the primary particle that Geiger counters are calibrated to detect!!!!!!!
If you have to have a Geiger that can detect alpha/beta particles to detect an increase, then you are not detecting radiation from the reactor. You
are detecting radiation from radon rainout!
That is another thing that has got me when looking at conversations. When they are looking at data from a ground monitoring site, they see a spike in
beta rays, but none in gamma, so the people say, “you have to pay attention to the beta reading that is the one that is important in this
situation” Um…… NO GAMMA IS! If you don’t see a spike in gamma, then there is nothing to talk about!!!!!!
Originally posted by bob365
"Geiger counters commonly use a conversion ratio of 1,000 CPM = 1 mR."
Um……. No they don’t………….
I can’t believe that even after how many times this subject has been covered that people are still quoting that statement. The conversion depends on
the Geiger tube used in that detector. Nothing else.
The counter in question has a tube with a calibration of 3,500CPM for a level of 1mR/hr
(Breath in, breath out)
I feel better now…
edit on 27-4-2011 by Mr Tranny because: (no reason given)