Now playing · 01 Therapy

Electron range rules of thumb

R_p = 4.500 cm

Rp≈E/2,R90≈E/3.2,R50≈E/2.33 cmR_p\approx E/2,\quad R_{90}\approx E/3.2,\quad R_{50}\approx E/2.33\ \mathrm{cm}

Rp ≈ E/2, R90 ≈ E/3.2, R80 ≈ E/2.8, R50 ≈ E/2.33 (cm, MeV, water).

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