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1,4

192

Ir

The Dose Rate Constant Λ

(Dose Rate per Unit Source Strength at 1cm & 90

°

)

0,8

0,9

1,0

1,1

1,2

1,3

131

Cs

169

Yb

137

Cs

198

Au

125

I

103

Pd

Λ

(cGy.h

-1

.U

-1

)

(r , θ ) = (1cm, 90

°

)

10

100

1000

0,5

0,6

0,7

Photon Energy (keV)

0 0