Rutherford (unit)
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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]]
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[[ja:ラザフォード (単位)]]