Talk:Positron
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The number is 1.022 Mev, a little over one Mev, not one thousand Mev. pstudier 20:50, 2003 Dec 8 (UTC)
- Yes, that was a mistake. - Patrick 00:24, 9 Dec 2003 (UTC)
Correct me if I'm wrong – I'm not a particle physicist – but isn't the positron supposed to have a spin of ±1/2?
No, you mistake the positron for the neutrino
How could the positron have spin +or- half, if so it could never be responsoble for the annihalation of it's anti-particle the electron
Electrons and Positrons both have spin of 1/2. To annihalate, an electron must meet a positron with opposite spin, that is, an electron with spin +1/2 must meet a positron with spin -1/2. This event gives off two photons, each of which have spin of 1. So one photon will have spin of +1 and the other -1. See Spin (physics). pstudier 23:14, 2004 Dec 3 (UTC)
- If a particle has "spin" 1/2, this means that the spin quantum number s = 1/2. The spin magnetic quantum number ms can have values -s, -s+1, ..., s-1, s. Thus, if s = 1/2, ms can be ±1/2. David Missing image
Da_Vit_in_Chu_Nôm.jpg
Da Vit
17:41, 8 Jun 2005 (UTC)
Publicity
At the Christie Hospital North West Medical Physics Open Evening last night, the speaker was talking about PET scanning and running a slide show, and on one of the slides was, in big(~20cm on a ~1m high screen) letters http://en.wikipedia.org/wiki/Positron. Boffy b 12:35, 2005 Mar 18 (UTC)