dose rates to a reference time only if the decay exponent *n *is 1.2. Normalization using the RADIAC

calculator is accomplished by aligning the dose rate on the outer disk with the time of the reading on the

intermediate scale. The H + 1 mark on the intermediate scale is then aligned with the dose rate at H + 1.

The same principle would apply if normalizing to H + 48. In Figure 5-3, a dose rate of 70 cGyph at H + 3

is normalized to 250 cGyph at H + 1.

250 cGyph

at H + 1

70 cGyph

at H + 3