Rutherford (unit)
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The rutherford (Rd) is an obsolete unit of radioactivity which was superseded withby the introduction of the becquerel in 1975. One rutherford was equivalent to 1,000,000 nuclear disintegrations per second, or alternatively one becquerel equated to one microrutherford.
History and etymology
The rutherford was introduced to replace the curie which was felt to be an impractical unit. It was introduced by I F Curtis and E U Condonin 1946, and in 1949 its official use was ratified by the National Research Council of the USA 3.
It was named after the New Zealand physicist, Ernest Rutherford ((1871–1937)2.
-<p>The <strong>rutherford</strong> (<strong>Rd</strong>) is an obsolete unit of radioactivity which was superseded with the introduction of the <a title="Becquerel" href="/articles/becquerel">becquerel</a> in 1975.</p><h4>History and etymology</h4><p>It was introduced in 1946 </p><p>It was named after the New Zealand physicist, <strong>Ernest Rutherford</strong> ()</p>- +<p>The <strong>rutherford</strong> (<strong>Rd</strong>) is an obsolete unit of radioactivity which was superseded by the introduction of the <a href="/articles/becquerel">becquerel</a> in 1975. One rutherford was equivalent to 1,000,000 nuclear disintegrations per second, or alternatively one becquerel equated to one microrutherford. </p><h4>History and etymology</h4><p>The rutherford was introduced to replace the <a href="/articles/curie-unit">curie</a> which was felt to be an impractical unit. It was introduced by <strong>I F Curtis</strong> and <strong>E U Condon</strong> in 1946, and in 1949 its official use was ratified by the National Research Council of the USA <sup>3</sup>. </p><p>It was named after the New Zealand physicist, <strong>Ernest Rutherford</strong> (1871–1937) <sup>2</sup>. </p>
References changed:
- 1. Lind SC. New Units for the Measurement of Radioactivity. (1946) Science (New York, N.Y.). 103 (2687): 761-2. <a href="https://doi.org/10.1126/science.103.2687.761-a">doi:10.1126/science.103.2687.761-a</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/17836457">Pubmed</a> <span class="ref_v4"></span>
- 2. Henry Colin Gray Matthew, Brian Howard Harrison. Oxford dictionary of national biography. (2018) <span class="ref_v4"></span>
- 3. Herbert Arthur Klein. The Science of Measurement. (2012) <a href="https://books.google.co.uk/books?vid=ISBN9780486144979">ISBN: 9780486144979</a><span class="ref_v4"></span>
Sections changed:
- Imaging Technology
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