0.0
0.5
1.0
1.5
2.0
2.5
3.0
11.0
11.5
12.0
12.5
13.0
13.5
In
itia
l a
sy
m
m
e
try
(%)
Time (
µ
s)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
11.0
11.5
12.0
12.5
13.0
In
itia
l a
sy
m
m
e
try
(%)
Time (
µ
s)
1.5
2.0
2.5
3.0
0.0
0.5
1.0
11.0
11.5
12.0
12.5
13.0
13.5
Initial asy
m
m
e
try
(%)
Time (
µ
s)
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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14
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