5.10 Liquid Geiger–Müller Counter
77
5.10 Liquid Geiger–Müller Counter
Unlike the End-Window G.M. counter, a specially designed counter can be used to
count liquid samples also. A typical design of a liquid G.M. counter along with a
typical assembly of various electronics instruments are shown in Fig. 5.14.
The liquid G.M. counter consists of two coaxial glass cylinders. Space between
the two glass walls is used for keeping radioactive liquid for counting. The inner glass
cylinder contains ionizing gas, the anode and cathode of the counter. The cathode is
either a spiral metal wire or the inner wall of this glass cylinder is coated with thin
film of silver to act as a cathode. At the center of the inner glass cylinder, there is a
Fig. 5.14 A schematic block
diagram of Geiger–Müller
counter (end window and
liquid type) with its various
electronic units
77
5.10 Liquid Geiger–Müller Counter
Unlike the End-Window G.M. counter, a specially designed counter can be used to
count liquid samples also. A typical design of a liquid G.M. counter along with a
typical assembly of various electronics instruments are shown in Fig. 5.14.
The liquid G.M. counter consists of two coaxial glass cylinders. Space between
the two glass walls is used for keeping radioactive liquid for counting. The inner glass
cylinder contains ionizing gas, the anode and cathode of the counter. The cathode is
either a spiral metal wire or the inner wall of this glass cylinder is coated with thin
film of silver to act as a cathode. At the center of the inner glass cylinder, there is a
Fig. 5.14 A schematic block
diagram of Geiger–Müller
counter (end window and
liquid type) with its various
electronic units