View source for Proton Proton Reaction

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'''Proton Proton Reaction'''
 
</dt><BR/>A [[Thermonuclear|thermonuclear]] 
reaction in which two [[Protons|protons]] collide 
at very high velocities and combine to form a [[Deuteron|deuteron]]. The 
resultant deuteron may capture another proton to form tritium and the latter 
may undergo proton capture to form helium. Compare [[Carbon Cycle|carbon 
cycle]]. 
</dd><BR/>''The proton-proton reaction is now believed to be the principal source 
of energy within the sun and other stars of its class. A temperature of the 
order of 5 million degrees Kelvin and high hydrogen (proton) concentrations 
are required for this reaction to proceed at rates compatible with energy 
emission by such stars. ''
</dd>
==References==
''This article is based on NASA's [[NASA SP-7|Dictionary of Technical Terms for Aerospace Use]]''
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