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The electromagnetic radiation most capable of ionizing is the radiation with the

highest energy per quantum. That in turn implies the radiation with the highest

frequency (shortest wavelength).

The highest-energy end of the electromagnetic spectrum is the region we call

"gamma rays". We can't generate these, and the gamma rays we observe all

originate in radioactive nuclear processes.

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Wiki User

12y ago
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Wiki User

13y ago

Alpha radiation is the most ionising however it is also the least penetrative. Gamma radiation is the least ionising but is the most penetrative.

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Anonymous

Lvl 1
4y ago

Alpha

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Q: What type of radiation causes most ionisation?
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