… and apparatus for measuring or detecting alpha, beta, gamma, X-ray, cosmic or other ionising radiations. …
Explanatory notes
… the resulting changes in the potential difference may be amplified and measured. (2) Geiger counters . A large … consist of several units such as a chamber or counter, an amplifier, a voltage supply unit for the chamber or counter, … time (e.g., 24 hours) do not require any auxiliary amplifiers, etc., but incorporate a very light moving …