Author Archives: paguyu

Conversion factor

The following table shows how different people use different conversion factors for the same tube. Who is right ? Geiger Tube Isotope CPM * conversion factor = μSv/h Used by LND 712 60Co 137Cs 1/107 = 0.00926 1/120 = 0.00833 … Continue reading

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Lesson Learnt: EMI

For the whole month of July I had been concerned with my measurements being too high, about 3 times what everybody else seems to measure. I never had 100% confidence that my instruments was telling me the truth, probably because I … Continue reading

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High Resolution Histogram

After looking at the picture in the Histogram page, I was getting concerned about the first bin on the left, which was basically saying that 8% of the readings had a value less than 0.049 μSv/h. I wanted to achieve … Continue reading

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Extraordinary radiation ?

A big dilemma now is knowing whether the current readings are normal or they are affected by the Fukushima accident. There is a way finding out, regardless of the fact that my graph shows higher values than the official sources. … Continue reading

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Safe levels ?

Is the level of radiation indicated by the time plot in the Home page safe ? According to http://en.wikipedia.org/wiki/Background_radiation the world’s annual average is 1.26 mSv/h, which divided by 365 days and 24 hours gives 0.143 μSv/h, so it appears … Continue reading

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Discrepancy of Results

The values in my Home page graph seem to be about four times higher than what is reported in the official documents. Compare it for example to http://mextrad.blob.core.windows.net/page/01_Hokkaido_en.html I am really anxious to find out why there is such a … Continue reading

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