Abstract
We have investigated the NMR line shapes of superfluid 3He-B in a rotating cylinder. In the vortex-free state at sufficiently large angular velocity of rotation, Ω≳1 rad/s, the main feature of the absorption spectrum is a large frequency-shifted peak above the Larmor frequency. The shape of this counterflow peak is both measured and calculated as a function of external magnetic field strength, angular velocity, temperature, and number of vortex lines. The NMR spectrum is derived from the calculated order-parameter texture. Reasonable agreement with the measured line shape is obtained by including line-broadening effects due to the external field inhomogeneity and Leggett–Takagi relaxation.
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Kopu, J., Schanen, R., Blaauwgeers, R. et al. NMR Line Shape of Rotating 3He-B at Large Counterflow Velocity. Journal of Low Temperature Physics 120, 213–232 (2000). https://doi.org/10.1023/A:1004681626963
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DOI: https://doi.org/10.1023/A:1004681626963