Beyond quantum mechanics
This topic is good. But it is beyond the scope of quantum mechanics. Field theory is used to look into such topic where particle does not remain the same, as in nucleus.
Pair Production and Annihilation / Discussion
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Oh, do you think so? That makes sense, but I think, the concept of "wave-particle duality" is some kind of basic for quantum mechanics, and this topic is a good evidence for "wave-particle duality" like photoelectric effect and the Compton effect. That's the reason I select this topic. thank you.
Hi, I agree with goimsuconn. It is a very special topic. There is one thing I do not understand. Although the energy is conserved before and after annihilation, the mass seems to be not conserved, considering the particles disappear after annihilation. But as we know, Mass is conserved is also a general law in the world. So could you explain to me about it? Thank you very much.
Good question. I think during those two process, the most important thing is the conservation of all kind of energy. During the entire process of pair annihilation, total energy of pair convert into photon energy. That is, if both particles have kinetic energy, photon’s energy would be larger than 0.511 MeV, and its wavelength might be shorter than 0.024Å. Would it be answer for you? thank you
Hello, Thanks for explaining pair-production. I would like to cite your page in mine for introducing pair-production clearly.
Hi, Good to hear you. Your topic, Compton scattering, is also a very affinitive topic to this one. So, I hope that other student refer to Kuoting's "Compton effect" page and Zengmin's "Photoelectric effect" page for their full understanding. It is helpful to understand three kind of energy lose process of photon.
I add the link of you two, as we are all talking about light-matter interaction , however, the light energy is different.
For your information, I link one of my reference below.
It's flash animation, so it may be easy to grasp the concept.
http://www.upscale.utoronto.ca/PVB/Harrison/Flash/Nuclear/PairProduction/PairProduction.html
/forum/t-138768/pair-production-and-annihilation#post-
