Radiation Protection Glossary

A radiation protection glossary for Radiation Protection Supervisors (RPS), Radiation Protection Advisers (RPA) and anyone else interesting in radiation safety terms and definitions. The glossary is a mixture of health physics , phrases related to radiation protection legislation, transport, practical safety, technical terms and similar.

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Dead Time

Dead Time is used in counting / detector systems to describe the time between two recorded events (e.g. where an Ionisation event has been recorded), where either the detector, or its electronics, are unable to detect other incoming events. A counting system which has a large dead time will more than likely miss true events that occur at intervals less than the dead time.

Atoms are very special: they like certain particular partners, certain particular directions, and so on. It is the job of physics to analyze why each one wants what it wants.

– Richard P. Feynman -