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