1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Proton proton annihilation

  1. Aug 22, 2015 #1
    How much force (<10kN) is needed to compress two protons into each other? When it happens, when they are annihilated, the energy of the released gamma rays E=Mp *c^2 ? or some are carried away by short-lived byproducts?

    Regards Karoly
  2. jcsd
  3. Aug 22, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Two protons cannot annihilate, that would violate baryon number conservation.
  4. Aug 23, 2015 #3


    User Avatar
    Science Advisor
    Gold Member


    Above will help.
  5. Aug 23, 2015 #4


    User Avatar
    Science Advisor
    Gold Member

    It's a matter of Energy rather than Force in discussions about this sort of collision / fusion. This link is short and says it in a nutshell. It was originally thought that protpn proton fusion would need too high a temperature (i.e. high enough energies) for it to happen in a normal Star. There has to be a tunnelling effect for it to happen and to form deuterium (along with other products). It is a very rare occurrence, which is why man-made fusion reactors use 'ready made' deuterium and tritium, which fuse more readily.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Proton proton annihilation
  1. Electrons and protons (Replies: 31)

  2. Shrinking Protons? (Replies: 1)

  3. Proton creation (Replies: 1)

  4. Electron &proton (Replies: 2)