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[[ICRP Publication 116]], 2010
'''Return to [[ICRP Glossary|Glossary]]'''
== Previous glossary entries ==
=== from [[ICRP Publication 131103]], 2015 2007; [[ICRP Publication 110]], 2008; [[ICRP Publication 119]], 2012 === The quotient of <math>dN</math> by <math>da</math>, where <math>dN</math> is the number of particles incident on a small sphere of cross-sectional area <math>da</math>, thus: