Boca Research Muon Liquid Handling System None User Manual
Page 14
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Initial asy
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a) b)
c)
Figure 1 Muonium precession signal at 2G in n-hexane after a) 4, b) 7 and c) 10 freeze-
pump-thaw cycles.
For the second experiment, all of the n-hexane used in the first experiment was
recovered into a sample bottle and dried using a small piece of clean sodium. The
liquid was carefully poured back into Vessel 1 and remounted on the rig. After
freezing and subsequent evacuation and re-pressurisation with helium, the dry n-
hexane was exposed to six freeze-pump-thaw cycles. Between each cycle, helium
was bubbled through the liquid for several minutes. Again, the sample cell was
attached to one of the sample delivery tubes and pumped for 1 hr before being loaded
with n-hexane.
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