Proton-proton chain reaction

URI: https://gptkb.org/entity/Proton-proton_chain_reaction
GPTKB entity
Statements (27)
Predicate Object
gptkbp:instanceOf nuclear fusion process
gptkbp:alternativeBranch gptkb:proton-proton_III_chain
gptkb:proton-proton_II_chain
gptkb:proton-proton_IV_chain
gptkbp:competitor gptkb:CNO_cycle
gptkbp:discoveredBy gptkb:Hans_Bethe
gptkbp:discoveredIn 1939
gptkbp:dominantIn main-sequence stars
https://www.w3.org/2000/01/rdf-schema#label Proton-proton chain reaction
gptkbp:importantFor stellar nucleosynthesis
solar neutrino production
gptkbp:launched fusion of two protons
gptkbp:netReaction 4 protons → helium-4 + 2 positrons + 2 neutrinos + energy
gptkbp:numberOfStages proton + proton → deuterium + positron + neutrino
gptkbp:occurredIn stars
gptkbp:powerSource gptkb:the_Sun
low-mass stars
gptkbp:produces gptkb:neutrinos
gptkb:gamma_rays
gptkb:helium-4
positrons
gptkbp:releasesEnergy 26.7 MeV per cycle
gptkbp:step deuterium + proton → helium-3 + gamma ray
helium-3 + helium-3 → helium-4 + 2 protons
gptkbp:temperature ~4 million Kelvin
gptkbp:bfsParent gptkb:Proton
gptkbp:bfsLayer 5