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<h3 class="section">38.14 Radioactivity</h3>
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<p><a name="index-radioactivity_002c-units-of-2338"></a>
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<dt><code>GSL_CONST_MKSA_CURIE</code><dd>The activity of 1 curie.
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<br><dt><code>GSL_CONST_MKSA_ROENTGEN</code><dd>The exposure of 1 roentgen.
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<br><dt><code>GSL_CONST_MKSA_RAD</code><dd>The absorbed dose of 1 rad.