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We report heat capacity measurements of confined films of
He. These studies were undertaken to test predictions of correlation-length scaling. They are the first measurements for completely confined films over a range of confinements, and represent a geometry where criticality changes from...
We report on the results of a search for superconductivity in Li. We find no evidence for the predicted transition to superconductivity at any temperature down to 5 mK in magnetic fields down to 0.4 μT. However, an unexpected Curie–Weiss temperature dependence in the magnetic susceptibility is...
Ortho-para conversion in solid hydrogen doped with small concentration of molecular oxygen (100 and 1000 ppm) was studied by pulsed NMR in the temperature range 4.2–10.9 K. Conversion rate was mainly determined by the paramagnetic oxygen impurities. The catalyzed conversion rate constant...
We have constructed a large new dilution refrigerator for use with the new Lancaster nuclear cooling facility. The machine is housed in a purpose-rebuilt suite of rooms and has been designed to have a very low base temperature, a very low heat leak environment and to run for long periods between...
We present an analysis of the small amplitude shape oscillations of a superfluid helium drop surrounded by saturated helium vapor. The equations of the two-fluid model are used to describe the liquid motion within the drop. The calculations are performed for two different sets of boundary...
The thermal activation or quantum tunneling is believed to be necessary for the vortex nucleated near a wall to escape from its vicinity, and for the vortex nucleated in the bulk to reach the critical size above which it can increase according to its own dynamics. This paper suggests the idea...
Decay mechanism of H
anions in X(γ)-irradiated solid para-H2
) has been studied using high-resolution ESR spectroscopy in the temperature range between 1.3–6.6 K. The results are summarized as follows. First,the decay rate constant of the
anions is not proportional to initial...
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