Experimental Ion Mobilities in Liquid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>below 1°K

Anderson, A. C.; Kuchnir, M.; Wheatley, J. C.

doi:10.1103/physrev.168.261

Cited by 128 publications

(19 citation statements)

References 31 publications

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“…2) agrees well with the earlier results of Anderson et al 4 in the region of overlap, but the scatter of our data points appears to be smaller. The temperature dependence of /1 + (Fig.…”

Section: Discussionsupporting

confidence: 93%

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Measurement of Ionic Mobilities in Liquid 3He by a Space Charge Method

McClintock

1974

Low Temperature Physics-Lt 13

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“…2) agrees well with the earlier results of Anderson et al 4 in the region of overlap, but the scatter of our data points appears to be smaller. The temperature dependence of /1 + (Fig.…”

Section: Discussionsupporting

confidence: 93%

“…relative to its value at 1.0 o K is therefore indicated by the scatter of the data points and the systematic error in its absolute magnitude will be the ± 10% quoted by Anderson et a/. 4 …”

Section: Field Emission and Field Ionization In Liquid 3hementioning

confidence: 83%

Measurement of Ionic Mobilities in Liquid 3He by a Space Charge Method

McClintock

1974

Low Temperature Physics-Lt 13

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“…From (2) it follows that these principal axis components/Zll and/z, are given by and e= y~ (Pz-P'z)2(-anp]ltp'~'p~122rr6(Ep-Ep') (6) where the z axis is parallel to /, and the x and y axes lie in a plane perpendicular to it. We find it useful to define the spin-averaged differential scattering cross …”

Section: Ion Mobility Tensormentioning

confidence: 99%

“…5 In normal 3He the mobility of electron bubbles has been found to approach a constant value below temperatures of the order of 100 mK, in the Fermi liquid regime. 6 Recently these measurements were extended from 17 mK right down to To, the superfluid transition temperature, and the normal state ion mobility was observed to remain remarkably temperature independent. 7<~ The value of the constant is a function of pressure only, although early theoretical papers had predicted a strongly temperature dependent mobility for the negative ion.…”

Section: Introductionmentioning

confidence: 99%

Mobility tensor of negative ions in superfluid 3He-A

1980

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The mobility tensor of negative ions in the A phase of superfluid 3He is calculated for temperatures close to To. In this regime the scattering of superfluid quasiparticles from an electron bubble is practically elastic and the mobility tensor is expressed in terms of momentum transfer cross sections for an ion at rest. These generalized transport cross sections are obtained from the quasiparticle-ion scattering T-matrix, which we evaluate in terms of the normal state scattering amplitude. The p-wave pairing correlations in the intermediate states result in important interference effects among all partial waves in the scattering process, and, in addition, for the low-energy quasiparticles they lead to resonant states below the gap edge. These phenomena modify the scattering amplitude in the superfluid in an essential way and the differential quasiparticle-ion cross section is found to display strongly anisotropic, energy-dependent variations on the scale of the superfluid energy gap. We find that, in contrast to simple approximations, for low quasiparticle energies the parallel and perpendicular momentum transfer cross sections are very different from one another. Close to To, the calculated mobility remains rather isotropic, but at lower temperatures the anisotropy is considerably larger than predicted by simple approximations for the cross section. The computed results are compared with the available measurements.

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“…6 the radius normalized to the zero-pressure radius. Equation (10) was used in calculating R from the measured mobility.…”

Section: Mobility Of Negative Ions In Normal 3hementioning

confidence: 99%

Negative ion motion in normal and superfluid 3He

et al. 1978

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We report the first measurements of negative ion motion in the superfluid phases of 3He and in the normal phase below 17 inK. Refrigeration was achieved with nuclear demagnetization of copper and we used a pulsed NMR platinum powder thermometer immersed in the liquid. In the A phase the longitudinal resonance frequency provided an additional high-resolution thermometer. In the normal phase we observed a strictly temperatureindependent mobility. In the superfluid phases we found two velocity regimes. For small applied electric fields the velocity is a linear function of the field and the corresponding mobility increases monotonically toward lower temperatures. At high electric fields the velocity is a nonlinear function of the field as a result of the pair-breaking effect of the moving ion. Available theoretical calculations are only in partial agreement with our results.

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Experimental Ion Mobilities in LiquidHe3below 1°K

Cited by 128 publications

References 31 publications

Measurement of Ionic Mobilities in Liquid 3He by a Space Charge Method

Measurement of Ionic Mobilities in Liquid 3He by a Space Charge Method

Mobility tensor of negative ions in superfluid 3He-A

Negative ion motion in normal and superfluid 3He

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