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| observable | unit (electrons) | unit (X-rays) | description |
|---|---|---|---|
| dose | MGy (106 J kg–1) | MGy (106 J kg–1) | energy absorbed per unit mass |
| fluence | e– Å–2 | γ μm–2 | particles delivered per unit area |
| flux | e– s–1 | γ s–1 | particles delivered per unit time |
| flux density | e– Å–2 s–1 | γ μm–2 s–1 | fluence delivered per unit time |
