TM-91N
EN-9
Press
more than 1 second to exit
and return to measurment mode.
The Geiger-mueller tube is located behind
the slots in the upper edge of the case. The
surface of the tube is very thin .This allows
beta radiation to penetrate and to be
detected with greater efficiency. (Beta rays
and other types of radiation will be
discussed in the next section). This thin
surface is fragile and poking sharp objects
through the slots will damage the tube.
Your Geiger Counter is designed to be
sensitive to:
1. Gamma radiation (which includes X-rays).
2. Beta radiation.
Gamma radiation and X-rays can
penetrate the plastic case with
comparative ease.
Beta radiation can most efficently enter
the case through the slots. Although Beta
radiation is easily detected. It is difficult to
measure accurately. Therefore, when a
radioactive object is being searched for
Beta radiation, the open slots in the case
should be positioned in such a way that
