Rutherford (unit) 3559678 220335194 2008-06-19T10:40:31Z 84.221.236.119 The '''rutherford''' (symbol '''rd''') is an obsolete unit of [[radioactivity]], defined as the [[activity (radioactivity)|activity]] of a quantity of radioactive material in which one million [[atomic nucleus|nuclei]] decay per [[second]]. It is therefore equivalent to 1 [[megabecquerel|MBq]]. ==Origin== It was named after [[Ernest Rutherford, 1st Baron Rutherford of Nelson]], known as the "father" of [[nuclear physics]]. [[Category:Units of radioactivity]] [[Category:Radioactivity]] [[de:Rutherford (Einheit)]] [[it:Rutherford (unità di misura)]] [[ja:ラザフォード (単位)]]