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"The proton–proton chain reaction is one of several fusion reactions by which stars convert hydrogen to helium, the primary alternative being the CNO cycle. The proton–proton chain dominates in stars the size of the Sun or smaller.
In general, proton–proton fusion can occur only if the temperature (i.e. kinetic energy) of the protons is high enough to overcome their mutual electrostatic or Coulomb repulsion.
In the Sun, deuterium-producing events are so rare (diprotons, the much more common result of nuclear reactions within the star, immediately decay back into two protons) that a complete conversion of the star's hydrogen would take more than 1010 (ten billion) years at the prevailing conditions of its core. The fact that the Sun is still shining is due to the slow nature of this reaction; if it went more quickly, the Sun would have exhausted its hydrogen long ago." [Proton–proton chain reaction. Wikipedia]
The nuclear reaction diagram example "Proton-proton chain reaction" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Physics solution from the Science and Education area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ science-education-physics
Proton-proton chain reaction diagram
Proton-proton chain reaction diagram,
The vector shapes library "Nuclear physics" contains 39 symbol icons of elementary particles for drawing diagrams of nuclear reactions and experiments in nuclear physics.
"Nuclear physics is the field of physics that studies the constituents and interactions of atomic nuclei. The most commonly known applications of nuclear physics are nuclear power generation and nuclear weapons technology, but the research has provided application in many fields, including those in nuclear medicine and magnetic resonance imaging, ion implantation in materials engineering, and radiocarbon dating in geology and archaeology.
The field of particle physics evolved out of nuclear physics and is typically taught in close association with nuclear physics." [Nuclear physics. Wikipedia]
The example "Design elements - Nuclear physics" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Physics solution from the Science and Education area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ science-education-physics
Elementary particles
Elementary particles, Rutherford, Bohr, atom model, Thompson, atom model, particle, gamma particle, electron neutrino, electron antineutrino, muon neutrino, muon antineutrino, positron, Mu-minus meson, muon, Mu-plus meson, muon, Pi-plus meson, pion, Pi-minus meson, pion, Pi-null meson, pion, K-plus meson, kaon, K-minus meson, kaon, K-null meson, kaon, Eta-meson, proton, nucleon, antiproton, nucleon, neutron, nucleon, antineutron, nucleon, Lambda-hyperon, Anti-Lambda hyperon, Sigma-plus-hyperon, Anti-Sigma-minus-hyperon, Sigma-null-hyperon, Anti-Sigma-null-hyperon, Xi-minus-hyperon, anti-Xi-minus-hyperon, Xi-null-hyperon, anti-Xi-null-hyperon, Omega-minus-hyperon, electron, nucleus model, Anti-K-null meson, antikaon, Anti-Sigma-minus-hyperon, Sigma-plus-hyperon, anti-Omega-minus-hyperon

physics charts Physics

physics charts
Physics solution extends ConceptDraw PRO software with templates, samples and libraries of vector stencils for drawing the physical illustrations, diagrams and charts.