Quantitative measurement of lung microstructure is of great significance in assessment of pulmonary disease, particularly in the earliest stages. The technique for MRI-based 3He lung morphometry was previously developed and validated for human lungs, and was recently extended to ex vivo mouse lungs. The technique yields accurate, quantitative information about the microstructure and geometry of...

Kaon photoproduction on 3He, γ + 3He −→ K+ + ΛH, is studied in the framework of the impulse approximation. Realistic 3He wave functions obtained as solutions of Faddeev equations with the Reid soft-core potential are used along with a simple ΛH wave function. Results are compared for several elementary operator models, which can successfully describe the elementary kaon production off the proto...

For backward elastic scattering of deuterons by 3He, cross sections σ and tensor analyzing power T20 are measured at Ed = 140 − 270 MeV. The data are analyzed by the PWIA and by the general formula which includes virtual excitations of other channels, with the assumption of the proton transfer from 3He to the deuteron. Using 3He wave functions calculated by the Faddeev equation, the PWIA descri...

Schuberth, Bakalyar and Adams (SBA) [1] have supercurrents may imply that magnetization can be recently reported evidence for a phase transition on supplied rapidly enough to allow solid to form with the 3He melting curve near the A 1 —A2 superfluid tranequilibrium polarization. Using the following expressitions in high magnetic fields. The phenomenon was sion for the entropy of the solid [5]: ...

Ripplons – gravity-capillary waves on the free surface of a liquid or at the interfaces between two superfluids – are the most favourable excitations for simulation of the general-relativistic effects related to horizons and ergoregions. The white-hole horizon for the “relativistic” ripplons at the surface of the shallow liquid is easily simulated using the kitchen-bath hydraulic jump. The same...

We present experimental observations of the suppressed superfluid transition temperature, Tca, superfluid fraction, ρs/ρ and Leggett frequency of 3He-B in aerogel, ΩBa. We determine Tca from mass decoupling and the vanishing of the frequency shift away from the Larmor frequency in our different samples and different laboratories. We find that the suppressed transition temperature for 3He in aer...

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 o...

The search for phase transitions is a hot topic in atomic and nuclear physics. Several different phase transitions are observed/or expected to be observed like 3He to 4He superfluid, Bose-Einstein condensation, liquid to gas nuclei and hadronic matter to Quark Gluon Plasma (QGP). The QGP phase transition is predicted by lattice QCD and several QGP signals have been suggested[1], although no con...