Physics Questions People Ask Fermilab
Pure Antineutron Beams
I am a physics student in Germany. I haven't had particle physics yet, so I'd be glad if you answered me one question:
How do you create more or less pure anti-neutron beams in your accelerator??
I'm sure it's possible somehow but I just don't know the way to relize that.
The "options" I got to know by now:
- collision of anti-protons with carbon nuclei can result in anti-neutrons
- decay of lambda-particles (how would you create them?)
I really thank you very much for helping me!
It is nice to see an enthusiastic student asking questions like this, it made me stop and think for a while. My answer is based upon an article in Physics Letters, Vol 23, page 160-163, "Further Results on the charge exchange pbar p -> nbar n at 5, 6, 7 and 9 GeV/c. The basic idea would be to take a beam of relatively low energy antiprotons such as we have stored in the Accumulator (8.9 GeV/c) and interact them with a hydrogen target (either a liquid target or a gas jet) . By looking in the forward direction you would get mainly antineutrons since the the angular distribution of the antineutrons is very strongly peaked in the forward direction. A sweeping magnet after the target would get rid of charged particles produced in other unwanted interactions. I hope this helps.
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