Koichi Oyama's Map

Please check out the maps Just below his portrait photo on his blog  http://mak55.exblog.jp/

Alpha-ray Monitoring Map

Measured results of Scintillation survey meter meansurative for Alpha-ray 
Measuring instrument : Hitachi-Aloka Medical TCS-232B
■ Climate conditions 
Conditions in rainfall and snowfall were set aside because natural radioactive substances and shielding by rain water cause an effect on the measure.
Same for the condition in the ingering snow and after the rain.
Measurings were conducted only in the condition of fair weather or cloudy but dry.

■Condition for the measure
3mm from the surface of the target 
The value of the count of 5 minutes of measuring reduced to cpm.

Black Substance Distribution  Map
Measured results of High-purity Germanium Semiconductor detector 

Courtesy : Koichi Oyama

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