Dose/ Equivalent dose

Dose : energy absorbed per kg  absorbing material

D  = Eabs/m        

  • D     dose in Gy  or  J kg-1 
  • Eabs  energy absorbed in J
  • m    mass  in kg

The effect of the ionizing radiation depends  among others on radiation type

This is represented   by the quality factor Q.

Q  for α-radiation is 20 and for  β-radiation is 1.

H = Q  Eabs/m                  

  • H    equivalent dose in Sv of J kg-1
  • Q    quality factor (no dimension)  
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