Spin rotation effects and spin waves in gaseous 3He↑
نویسندگان
چکیده
2014 Spin polarized gases such as H~ or 3He~ can propagate damped spin waves at low temperatures; their origin is the so-called « identical spin rotation effect » in collisions between identical particles. We report here the observation of such effects in 3He~ in the temperature range 2 T 6 K, and preliminary measurements of the coefficient 03BC which characterizes the quality factor of the spin oscillations. The measurements are in agreement with the numerical calculations of C. Lhuillier. J. Physique Lett. 45 (1984) L-441 L-448 ler ~,~,11984, : -~
منابع مشابه
Thermodynamic properties of polarized liquid 3He along different isentropic paths
The dependence of some thermodynamic properties of spin-polarized liquid 3He such as velocity of sound, adiabatic index, isentropic compressibility and temperature on the spin polarization has been investigated along different isentropic paths. The Lennard-Jones potential has been used in our calculations. It has been found that for higher values of entropy, the spin polarization has greate...
متن کاملTemperature Increase of Highly-Polarized Fermi Liquids in Spin-Echo Experiments
We show that there are restrictions on the maximum tipping angle that can be used without significantly raising the temperature of the 3He distribution in high B/T spin-echo experiments with pure liquid 3He and 3He-4He solutions. The temperature increase occurs during the diffusion process as quasiparticles in mixed-spin states are scattered and converted into thermal excitations at the spin-up...
متن کاملDeep Inelastic Scattering of Polarized Electrons off Polarized He: Nuclear Effects and the Neutron Spin Structure Functions
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...
متن کاملTHE SLAC HIGH–DENSITY GASEOUS POLARIZED 3He TARGET*
A large-scale high-pressure gaseous 3He polarized target has been developed for use with a high-intensity polarized electron beam at the Stanford Linear Accelerator Center. This target was used successfully in an experiment to study the spin structure of the neutron. The target provided an areal density of about 7×1021 nuclei/cm2 and operated at 3He polarizations between about 30% and 40% for t...
متن کاملSpin-polarized 3He : liquid gas equilibrium
We study the effects of nuclear polarization M on the liquid-gas equilibrium phase diagram of 3He, in situations where the saturating vapour pressure increases or decreases as a function of M, and where a metamagnetic instability may occur in the liquid phase. Numerical predictions are given within the frame of a phenomenological model with parameters fitted to reproduce accurately the saturati...
متن کامل