Boca Research None manual Initial asymmetry

a)	13.5
	13.0
(%)	12.5
Initial asymmetry
	12.0
	11.5
	11.0
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

Time (µs)

b)	13.0
	12.5
(%)
Initial asymmetry	12.0
	11.5
	11.0
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

Time (µs)

c)	13.5
	13.0
(%)	12.5
Initial asymmetry
	12.0
	11.5
	11.0
	0.0	0.5	1.0	1.5	2.0	2.5	3.0

Time (µs)

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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