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Re: antimatter

William J. Larson <Bill_Larson@compuserve.com> wrote:

I'm not aware of experimental evidenve of the gravitational properties
of antimatter. Since gravity is so weak this is a very hard experiment
to do. Has it been done and I missed it?

Yes, it has. Jim Lockhart and Bill Fairbank did this experiment at
Stanford in
the mid-1970s. The positrons fall down, not up.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++

Roger A. Freedman

I memory serves me correctly, the Stanford experiment was
inconclusive owing to induced currents in the superconducting walls of the
chamber.

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