✍ Scribed by K. Torizuka; J.P. Pekola; J.M. Kyynäräinen; A.J. Manninen; O.V. Lounasmaa; G.K. Tvalashvili
No coin nor oath required. For personal study only.
The first experiments on rotating sHe-A1 have been done using pulsed zero sound transmission techniques at several pressures in magnetic fields up to 1 T. Preliminary analysis of our data by a geometrical acoustics method suggests that the vortex cores in sHe-At are larger than in sHe-AZ. This result is based on the strong and highly non-linear rotation dependence of sound attenuation in sHe-At . Conclusions about the type of vortices in sHe-A, cannot be made at present owing to lack of theory.
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A nuclear demagnetization cryostat, capable of producing submillikelvin temperatures during rotational motion, was constructed. The apparatus has been used for NMR experiments on superfluid He 3 at angular velocities up to 1.5 rad s -~. The essential technical details and the operation of the cryost
We report pulsed nmr experiments on a 2.6% 10 mK and 1 K. 3He-4He solution at 347 MHz and at temperatures between By analysing the phase of the spin echoes we have determined the spin rotation parameter. The decay of the transverse magnetisation is not consistent with the Leggett-Rice theory.