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Bremsstrahlung
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When electrons are absorbed in matter they are decelerated and emit Bremsstrahlung braking radiation. Consequently any source emitting b particles will have a Bremsstrahlung spectrum superimposed on the gamma ray spectrum.

The presence of this radiation causes a considerable increase in peak background at low energy and reduces the precision of measurement.

Bremsstrahlung radiation
 

The University of Liverpool
1999, 2000 The University of Liverpool, Department of Physics

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