3He atoms dissolved in superfluid 4He may form dimers (He)2 in two-dimensional (2D) geometries. We study dimer formation in films of dilute 3He–4He mixture. After designing a schematic 3He–3He interaction potential we calculate the dimer binding energy for various substrates. It is shown that 3He impurity states localized near the substrate give rise to the largest magnitudes of the binding ene...

K. Matsumoto,* J. V. Porto, L. Pollack, E. N. Smith, T. L. Ho, and J. M. Parpia Laboratory of Atomic & Solid State Physics and Materials Science Center, Cornell University, Ithaca, New York 14853 (Received 14 January 1997) We present evidence for a nonzero pressure, T ­ 0 superfluid phase transition of 3He in 98.2% open aerogel. Unlike bulk 3He which is a superfluid at T ­ 0 at all pressures (d...

Ionizing radiation increases the nuclear spin relaxation in the target chamber. Also known as “beam depolarization,” it is essentially a two step process. First, the beam ionizes an 3He atom which results in an free electron and an atomic ion 3He+. There is also the possibility that the atomic ion bonds with an neutral 3He atom to form an molecular ion He2 . Second, interactions with 3He ions i...

The effect of inhomogeneous perturbations created by a nematic aerogel in liquid 3He on the form order parameter arising at transition to superfluid state is studied. It shown that stability boundary distorted polar Anderson–Brinkman–Morel phase can arise just line certain characteristics aerogel. A symmetry-based argumentation for choice aerogels most suitable stabilizing given.

Eggleton et al. (Reports, 8 December 2006, p. 1580) reported on a deep-mixing mechanism in low-mass stars caused by a Rayleigh-Taylor instability that destroys all of the helium isotope 3He produced during the star's lifetime. Observations of 3He in planetary nebulae, however, indicate that some stars produce prodigious amounts of 3He. This is inconsistent with the claim that all low-mass stars...

Abstract The low-temperature properties of a wide range many-fermion systems spanning metals, quantum gases and liquids to nuclear matter are well understood within the framework Landau’s theory Fermi liquids. low-energy physics these is governed by interacting fermionic quasiparticles with momenta energies near surface in momentum space. Nonequilibrium described kinetic equation for distributi...

We have investigated the dissipation (Q-1) using the torsion pendulum technique for pure 3He and 3He-4He mixtures in silica aerogel near the 3He superfluid transition (T(c)) in aerogel. With pure 3He the Q-1 decreases at the onset of superfluidity. When phase separated 3He-4He mixtures are introduced into the aerogel, the Q-1 does not decrease as rapidly and eventually increases for the highest...