High Background Radiation Rates - Is This Normal?

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SUMMARY

The forum discussion centers around the background radiation readings observed on a Ludlum Model 3 Survey Meter, specifically noting counts of 2-3K counts per minute (cpm). The user initially misconfigured the meter on the X0.1 scale, which contributed to the high readings. The probe used is a NaI(Tl) scintillator, which is primarily sensitive to low-energy gamma/X-rays. After recalibrating and checking the background radiation outdoors, the readings stabilized between 200-300 cpm, indicating that the initial high readings were likely due to misconfiguration rather than abnormal radiation levels.

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  • #31
gleem said:
Right so why the 2 - 3 Kcpm counts in the OP?

Don gave an answer to that in his first post, he has it on the wrong setting ...

Never mind, I was on the X0.1 scale. But that's still high, isn't it?
Ohhh and auroral activity isn't going to make a detector read anything extra... The aurora is produced by
mostly electrons and some protons being trapped in the Earth's magnetic field

And fortunately, because of our atmosphere's protection, reading a burst of x-rays, when they arrive, several days
before the auroral activity begins is unlikely to occur at ground level either.
 
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  • #32
davenn said:
Don gave an answer to that in his first post, he has it on the wrong setting ...
Looks like the half-life of my memory is about 1 post. :sorry:

davenn said:
Ohhh and auroral activity isn't going to make a detector read anything extra... The aurora is produced by
mostly electrons and some protons being trapped in the Earth's magnetic field
Admittedly that was a bit of a reach but x-rays and gamma rays are a small component of the radiation, and gammas from neutron activation have been observed and Don's NaI detector is quite sensitive to low-energy x-rays.
 
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