Geiger-Muller detector

The Geiger-Muller detector is a radiation detector which operates in the G-M region. 

In 1946, George Moore, a neurosurgeon at the University of Minnesota, used a radio-labeled dye, iodofluorescein, to localize brain tumors with a Geiger-Muller detector during surgery. 

DESCRIBE the operation of a Geiger-Muller (G-M) detector to include ... 

A locally resolved detection of radioactive samples after chromatographic separation can be performed by imaging techniques which work either indirectly with Eu3+- or P-doped sensor plates and laser activated emission or directly by a micro channel array detector which works like an open Geiger-Muller counter. 

The Berthold 4-pi thin-layer scanner (Fig.3.20) also uses a Geiger—Muller gas-flow detector. Use of the gases methane or argon-methane (9 1) is suggested. The 4-pi system... 

Alpha-particle detector Beta-particle detector Gamma-ray detector proportional counters silicon (Si) diode with spectrometer proportional counters Geiger-Muller counters liquid scintillation (LS) counters thallium-activated sodium iodide (Nal(Tl) detector with spectrometer germanium (Ge) detector with spectrometer... 

In-line detection. In the treatment of solutions containing americium the americium 241 content of solutions leaving the chromatography columns is continuously monitored. The gamma detector is a miniature Geiger-Muller tube placed in contact with the solution outlet pipe. The unit is shielded from ambient irradiation by lead. 

Kind of radiation Ionization chambers Proportional counters Geiger-Muller counters Scintillation detectors Semiconductor detectors... 

Finally, the influence of the dead time D in eq. (7.3)) has to be taken into account, particularly if the dead time of the detector is high (as in the case of Geiger Muller counters) and if the counting rates of the sample and the calibration source are markedly different. 

Contamination on the hands can be detected with Geiger Muller or proportional counters. For detection and measurement of air-borne contamination, filters may be used. The activity on the filters can be measured continuously by passing the filters througli a proportional counter. Radioactive contamination on laboratory benches, instruments or floors can be detected by the simple method of wiping the surface to be checked for contamination is wiped with a piece of filter paper, and the filter paper is measured with a suitable detector for a, p or y activity. 

Geiger-Muller counter. If a very high electric potential is applied across the electrodes of a gas-filled detector, the gas amplification achieves a maximum value ... 

This last type of gas detector is currently the most used in X-ray diffraction. It has several advantages compared to the Geiger-Muller counter ... 

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