Geiger counter/Definition

This article contains just a definition and optionally other subpages (such as a list of related articles), but no metadata. Create the metadata page if you want to expand this into a full article.

Geiger counter [r]: A instrument for measuring ionizing radiation, built around a Geiger-Mueller tube, electronics for powering it and counting ionization events, and possibly filters to adjust the energy and type of radiation hitting the detector tube