Multiple sample radioactivity detector

Details Multiple sample radioactivity detector Multiple sample radioactivity detector

H - Electricity

01

J

358/21, 358/34

H01J 47/02 (2006.01) G01N 27/447 (2006.01) G01T 1/185 (2006.01) G01T 7/00 (2006.01)

Patent

CA 1236227

-19- MULTIPLE SAMPLE RADIOACTIVITY DETECTOR ABSTRACT A detecting head assembly is described which is capable of simultaneously detecting radio-active emissions (such as beta particles) from multlplicity of samples. The assembly lncludes a sample holder (1) defining a mult- iplicity of sample receiving zones (2) and structure defining a multiplicity of drift chambers (12). A beta particle emitted from a sample ionizes gas within the drift chamber (12) and negative ions are funnelled by the application of an electric field, through holes (7) in a mask (6) part of the structure for collection by anode wires (4). The anode wires are isolated from one another by walls (11), the latter walls and structure being grounded and the sample holder being connected to a high negative potential. Cathode strips (3) cross-over the anode wires (4) to form crossing points (5) which detect negative ions passing through the respective holes (7). The effect of the electric field is to increase the gain of the detecting head assembly. The assembly is useful in the field of medical diagnostics and biomedical re- search for providing information relating to radio-active samples.

495719

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