In figure captions for Figs. 1.13, 1.19, 2.12, 2.23, 3.7, 3.13, 3.17, and 3.20, the words (Adapted from Ahrens, 1994) should be included.

Page 31, in subheading 1.6.2, Ppm should be replaced with ppm

Page 51, 10th line, 100° should be replaced with 100 °C

Page 282, in example 1, the first line, (½) should be (T½)

Page 282, in example 1, \(\acute{\eta}\) should be replaced with or. Therefore the phrase in parentheses in the second paragraph should read (disintegrations per second or Becquerel)

and the subsequent equation should read:

A (dps or Bq) = Nλ