There is a growing demand for experiments on calorimetric and thermal transport measurements at ultra-low temperatures below 1 mK high magnetic fields up to 16 T. Particularly, milligram-sized solid samples are of great interest. We present the development scalable thermometers based quartz tuning fork resonators immersed in liquid 3He adapt hydrodynamic models provide an improved description t...

We demonstrate spin-exchange optical pumping of 3He using a "hybrid" K-Rb vapor mixture. The Rb atoms absorb light from a standard laser at 795 nm, then collisionally polarize the potassium atoms. Spin-exchange collisions of K and 3He atoms then transfer the angular momentum to the 3He with much greater efficiency than Rb-3He. For a K-rich vapor, the efficiency of the hybrid spin-exchange colli...

We study a two-phase sample of superfluid 3He where vorticity exists in one phase (3He-A) but cannot penetrate across the interfacial boundary to a second coherent phase (3He-B). We calculate the bending of the vorticity into a surface vortex sheet on the interface and solve the internal structure of this new type of vortex sheet. The compression of the vorticity from three to two dimensions en...

A magnetometer using spin-polarized K and 3He atoms occupying the same volume is used to search for anomalous nuclear spin-dependent forces generated by a separate 3He spin source. We measure changes in the 3He spin precession frequency with a resolution of 18 pHz and constrain anomalous spin forces between neutrons to be less than 2x10(-8) of their magnetic or less than 2x10(-3) of their gravi...

The equation of state of two-dimensional 3He at zero temperature has been calculated using the diffusion Monte Carlo method. By means of a combination of the fixed-node and released-node techniques, it is shown that backflow correlations provide a very accurate equation of state. The results prove unambiguously the non-self-bound character of two-dimensional 3He due to its Fermi statistics. We ...

Angular distrihutions of the ‘rC(d, 6Li)8Be reaction at i& = 78.0 MeVand the 1’B(3He, ‘Li)*Be reaction at E,,, = 71.8 MeV were measured. Transitions leading to ‘Be in the ground state and the 3.04, 16.63, 16.92, 17.64 and 18.15 MeV excited states were observed. A DWBA analysis was performed regarding the (d, 6Li) and (3He, 6Li) reactions as direct LY particle or triton transfers, respectively. ...

Nuclear effects in Deep Inelastic Scattering of polarized electrons off polarized 3He are analyzed in terms of a spin dependent spectral function taking into account S′ and D waves in 3He, as well as Fermi motion and binding effects. A simple and reliable equation relating the neutron and 3He spin structure functions is proposed. The spin structure functions (SSF) of the nucleon g 1 and g N 2 p...

Between 0.65 K and 3.2 K, the temperature dependence of the vapor pressure P of 3He is defined by the International Temperature Scale of 1990 (ITS-90). However, the ITS-90 vapor pressure equation was not designed to be consistent with the scaling law required for the second temperature derivative of the vapor pressure in the vicinity of the liquid-vapor critical point. In this paper, two scalin...

The bound state of a 3He atom at the interface between coexisting crystalline and superfluid phases 4He is studied theoretically by means first principle Quantum Monte Carlo simulations. We consider both case solid/superfluid interface, as well that few solid layers forming on an attractive substrate. It observed sharply localized in well-defined, quasi-2D layer region intermediate liquid. whic...