An isotope is one of two or more atoms of the same element that have the same number of protons in their nucleus but different numbers of neutrons. This two-volume book set and CD-ROM contains information about the emitted radiation (x-rays, x-ray particles, etc) from all known isotopes. This information is of interest to scientists wanting to detect radiation, protect people from it, or work with radioactive materials. This edition contains nuclear structure and decay data for approximately 3138 isotopes and isomers. Summary drawings, convenient tables of structure and decay data, and extensive appendices expedite the retrieval and use of nuclear information. The CD-ROM that comes with the books makes searching quick, easy and portable. The CD also has hyperlinked indices; 20,000 pages of the full Nuclear Safety Regulatory committee references; easy to read tables; data is color coded and appendices have been expanded since the last edition.