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When using a proportional counter tube for the simultaneous measurement of Alpha and Beta radiation, one has to keep in mind that Alpha particles, due to their double positive charge and their 8000 times greater rest mass than Beta particles, will generate an ion avalanche which is greater by several orders of magnitude (specific ionization) in the vicinity of the counting wires; thus, Alpha particles create a much greater analog signal in the amplifier.

Simultaneous Alpha && Beta Determination

When using a proportional counter tube for the simultaneous measurement of Alpha and Beta radiation, one has to keep in mind that Alpha particles, due to their double positive charge and their 8000 times greater rest mass than Beta particles, will generate an ion avalanche which is greater by several orders of magnitude (specific ionization) in the vicinity of the counting wires; thus, Alpha particles create a much greater analog signal in the amplifier.

Long-term stability of a detector

The long-term stability of a detector is extremely important for a consistently high quality measurement performance and accuracy during the entire operation. Long-term drifts of detectors sensitivity can be caused by temperature changes and aging. If they go unnoticed and uncompensated, they can cause considerable loss in production yields and product quality.

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