Characteristics of Several Types of Ionizing Radiation




APPROXIMATE RANGE


Type of Radiation
Approximate Energy
In Air
In Soft Tissue
Origin
PARTICULATE




Alpha particles
4-7 MeV
1-10 cm
Up to 0.1 mm
Heavy radioactive nuclei
Beta particles
0-7 MeV
0-10 m
0-2 cm
Radioactive nuclei
ELECTROMAGNETIC




X-rays
0-25 MeV
0-100 m
0-30 cm
Electron cloud
Gamma rays
0-5 MeV
0-100 m
0-30 cm
Radioactive nuclei

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