辐射与物质的相互作用英文.pdfVIP

Radiation Interactions with Matter LIU Yi-Bao　Wang Ling School of Nuclear Engineering and Technology East China Institute of Technology Contents • Introduction • Interaction of Heavy Charged Particles • Interaction of Fast Electrons • Interaction of Gamma Rays • Interaction of Neutrons • Radiation Exposure and Dose Introduction The radiation detections based on: 1. Radiations interact with matter; 2. Radiations lose their energy in matter. Four major categories of radiations: Charged Particulate Uncharged Radiations Radiations Heavy charged particles  Neutrons (characteristic distance~10-5m) (characteristic length ~10- 1m) Fast electrons  X-rays and Gamma rays (characteristic distance~10-3m) (characteristic length ~10- Detect for neutrons by the secondary heavy charged particles Charged Particulate Uncharged Radiations Radiations Heavy charged particles  Neutrons (characteristic distance~10-5m) (characteristic length ~10- Fast electrons 1m) (characteristic distance~10-  X-rays and Gamma rays 3m) (characteristic length ~10- 1m) Detect for X-rays or -rays by the secondary electrons 2.1 Interaction of Heavy Charged Particles A. Nature of the Interaction  electron Sufficient E to create