Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Thirty-minute coherence in free induction decay signals in superfluid He-3-B.
AU - Fisher, Shaun N.
AU - Guénault, A.M.
AU - Hale, A. J.
AU - Pickett, George R.
AU - Reeves, P. A.
AU - Tvalashvili, G.
PY - 2000/12
Y1 - 2000/12
N2 - The persistent induction signal (PIS) is an extremely long lived NMR mode in, the B-phase of superfluid He-3. The first signals observed lived for zip to 25s following a moderate NMR tipping pulse, but were found to be highly irreproducible. Here we present new measurements obtained in, a smooth sapphire cell designed to achieve the lowest possible temperatures. The signals observed in this cell are quite reproducible but are only excited over a restricted range of magnetic field gradients. The free induction signals exceed 30 minutes at the lowest temperatures.
AB - The persistent induction signal (PIS) is an extremely long lived NMR mode in, the B-phase of superfluid He-3. The first signals observed lived for zip to 25s following a moderate NMR tipping pulse, but were found to be highly irreproducible. Here we present new measurements obtained in, a smooth sapphire cell designed to achieve the lowest possible temperatures. The signals observed in this cell are quite reproducible but are only excited over a restricted range of magnetic field gradients. The free induction signals exceed 30 minutes at the lowest temperatures.
KW - helium-3
KW - superfluid
KW - spin precession
U2 - 10.1023/A:1017520806966
DO - 10.1023/A:1017520806966
M3 - Journal article
VL - 121
SP - 303
EP - 308
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 5-6
ER -