There have been many interesting developments in the field of nuclear radiation detectors, especially in those using semiconduct ing materials. The purpose of this book is to present a survey of the developments in semiconductor detectors along with discus sions about gas counters and scintillation counters. These discus sions are directed to detector users, usually scientists and technicians in different fields such as chemistry, geology, bio chemistry, and medicine. The operation of these detectors is discussed in terms of basic properties, such as efficiency, energy resolution, and...