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Fusion in sun

  1. Nov 10, 2007 #1
    does the fusion reaction in sun produce neutrons or neutrinos? i read websites of which one is saying neutron is produced but the other one says neutrino is produced..which one is correct..what other things would be produced when hydrogen fuses to produce helium in the core of sun?
  2. jcsd
  3. Nov 10, 2007 #2


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    Firstly, this isn't cosmology! Secondly, in answer to your question, I'd say both are produced. Perhaps this link will help you.
  4. Nov 10, 2007 #3
    i thought this would be the right place to post my doubt,if its wrong,then sorry...the link which u gave says neutrinos are produced but u said both are produced..
  5. Nov 10, 2007 #4


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    Well, yes, but Helium contains neutrons, doesn't it?
  6. Nov 10, 2007 #5
    what i mean is, which one is emitted from sun,neutrinos or neutrons?
  7. Nov 10, 2007 #6


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    Neutrinos are emitted from the Sun in large quantities. However there are many many different nuclear processes occurring in the Sun and I would think that at least some of these also lead to neutrons coming from the Sun, though I have no idea of the flux of them (if there is any at all).

    Isolated Neutrons are unstable however, and therefore would likely decay before they get very far. Therefore I wouldn't think that there would be an appreciable amount of Neutrons emitted from the Sun that reach the Earth.
  8. Nov 10, 2007 #7


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    Because the density of hyrogen in the sun is much like that of water, few neutrons would likely escape the sun. If they didn't decay (half-life ~ 10.23 min) they are readily absorbed by protons form deuterons, and deuterons are part of the pp-chain, and p + d => He3. Since free neutrons would readily decay, if there was a large quanity leaving the sun, the we'd measure a flux of anti-neutrinos from the beta decay.
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