https://scholarlywiki.org/index.php?action=history&feed=atom&title=Physics%3A%28n-p%29_reactionPhysics:(n-p) reaction - Revision history2026-05-15T16:34:42ZRevision history for this page on the wikiMediaWiki 1.43.1https://scholarlywiki.org/index.php?title=Physics:(n-p)_reaction&diff=2239&oldid=prevWikiHarold: url2022-10-23T07:28:30Z<p>url</p>
<p><b>New page</b></p><div>The '''(n-p) reaction''', or '''(n,p) reaction''', is an example of a [[Physics:Nuclear reaction|nuclear reaction]]. It is the reaction which occurs when a [[Physics:Neutron|neutron]] enters a [[Physics:Atomic nucleus|nucleus]] and a [[Physics:Proton|proton]] leaves the nucleus simultaneously.<ref>{{cite book<br />
|title=Elements Of Nuclear Reactors<br />
|last=Jha<br />
|first=D. K.<br />
|isbn=978-81-7141-883-1<br />
|url=https://books.google.com/books?id=P9K9nbveFnkC&pg=PA65<br />
|year=2004<br />
|publisher=Discovery Publishing House<br />
|page=65<br />
}}</ref><br />
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For example, [[Physics:Sulfur-32|sulfur-32]] (<sup>32</sup>S) undergoes an (n,p) nuclear reaction when bombarded with neutrons, thus forming [[Physics:Phosphorus-32|phosphorus-32]] (<sup>32</sup>P).<br />
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The nuclide [[Physics:Nitrogen-14|nitrogen-14]] (<sup>14</sup>N) can also undergo an (n,p) nuclear reaction to produce [[Physics:Carbon-14|carbon-14]] (<sup>14</sup>C). This nuclear reaction <sup>14</sup>N (n,p) <sup>14</sup>C continually happens in the Earth's atmosphere, forming equilibrium amounts of the radionuclide <sup>14</sup>C.<br />
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Most (n,p) reactions have threshold neutron energies below which the reaction cannot take place as a result of the charged particle in the exit channel requiring energy (usually more than a MeV) to overcome the [[Physics:Coulomb barrier|Coulomb barrier]] experienced by the emitted proton. The (n,p) nuclear reaction <sup>14</sup>N (n,p) <sup>14</sup>C is an exception to this rule, and is exothermic – it can take place at all incident neutron energies.{{cn|date=August 2017}} The <sup>14</sup>N (n,p) <sup>14</sup>C nuclear reaction is responsible for most of the radiation dose delivered to the human body by thermal neutrons – these thermal neutrons are absorbed by the nitrogen <sup>14</sup>N in proteins, causing a proton to be emitted; the emitted proton deposits its kinetic energy over a very short distance in the body tissue, thereby depositing radiation dose.<br />
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==References==<br />
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{{DEFAULTSORT:Np reaction}}<br />
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{{Nuclear processes}}<br />
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[[Category:Nucleosynthesis]]<br />
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{{Sourceattribution|(n-p) reaction}}</div>WikiHarold