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physical phenomena > energy source > exothermic fusion process > hydrogen burning > proton-proton chain > PP I
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PP I
subjectfact 
PP Ihas reaction 1H(p, β+v)2D(p, γ)3He(3He, 2p)4Hehas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:42.0
has definition A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei producing 4 × 10-5 ergs of energy. Although the neutrinos from this reaction are detectable, they have not been observed.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:29:42.0
is an instance of proton-proton chain2001-09-27 09:29:42.0
proton-proton chainhas required reactant concentration high2001-09-27 09:29:42.0
has optimum temperature 5 million Kelvin2001-09-27 09:29:42.0
has part intermediate product deuterium2001-09-27 09:29:42.0
has part intermediate product tritium2001-09-27 09:29:42.0
has part product helium2001-09-27 09:29:42.0
has part reactant proton2001-09-27 09:29:42.0
has next higher temperature reaction carbon cycle2001-09-27 09:29:42.0
has temperature dependence E ∝ T42001-09-27 09:29:42.0
has minimum temperature 107 K2001-09-27 09:29:42.0
has synonym p-p chain2001-09-27 09:29:42.0
has location the center of the Sun an other stars2001-09-27 09:29:42.0
hydrogen burninghas minimum mass 0.08 solar masses2001-09-27 09:29:41.0
has product helium2001-09-27 09:29:41.0
has catalyst2001-09-27 09:29:41.0
has reactant hydrogen2001-09-27 09:29:41.0
exothermic fusion processliberates energy2001-09-27 09:29:41.0
fusionhas antonym fission2001-09-27 09:29:41.0
produces energy2001-09-27 09:29:41.0
has reaction probability2001-09-27 09:29:41.0
physical processhas domain physics2001-09-27 09:29:38.0

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