We have studied the superfluid behavior of liquid 4He confined in three samples of Gelsil glass, whose pore size distribution was examined by measuring N2 pressure isotherm. It was found that the superfluid transition temperature under the saturation vapor pressure is 1.37 K for one of the samples whose pore size ranges up to around 6 nm, while it is 0.83 K for another one in which the distribution of pore size is small above 4 nm. Both of the samples have a bottleneck structure of the same size. These results demonstrate that the suppression of superfluidity is related to the pore size distribution rather than the size of the neck.
|Journal||Journal of Physics: Conference Series|
|Issue number||PART 1|
|Publication status||Published - 2012 Jan 1|
|Event||26th International Conference on Low Temperature Physics, LT 2011 - Beijing, China|
Duration: 2011 Aug 10 → 2011 Aug 17
ASJC Scopus subject areas
- Physics and Astronomy(all)