LB 124 Scint 1. The Principle of Operation of the LB 124 Scint
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1. The Principle of Operation of the LB 124 Scint
1.1 Overview
The portable contamination monitor LB 124 Scint is used for de-
tecting and measuring radioactive alpha, beta and gamma con-
tamination on various surfaces such as floors, walls, desks, ob-
jects, clothes or the skin. It consists of a display unit with micro-
processor electronics, the photomultiplier, and a ZnS scintilla-
tion counter with an effective window size of 118 mm x 145 mm,
which can easily be replaced, and which is inserted in the bot-
tom of the instrument.
The LB 124 Scint is able to distinguish alpha nuclides from be-
ta/gamma nuclides and measure them simultaneously.
The data can alternatively be displayed as count rate (cps =
counts per second) or as area activity (Bq/cm²).
The device is protected as much as possible against environ-
mental conditions such as humidity, dust or extreme tempera-
tures, and is therefore also suited for outdoor use and rough
operating conditions. The entrance window of the detector is
protected against damage by a metal grid.
Since not only professionals will work with the Contamination
Monitor, we would like to give you some quick information on
the working method of scintillators and on how to perform ra-
dioactivity measurements.
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