p43 069

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69. The dose equivalent is the product of the absorbed dose and the RBE factor, so the absorbed dose is

(dose equivalent)/(RBE) = (250

×10

6

Sv)/(0.85) = 2.94

×10

4

Gy. But 1 Gy = 1 J/kg, so the absorbed

dose is



2.94

× 10

4

Gy

 

1

J

kg

·Gy



= 2.94

× 10

4

J/kg .

To obtain the total energy received, we multiply this by the mass receiving the energy: E = (2.94

×

10

4

J/kg)(44 kg) = 1.29

× 10

2

J.


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