Nuclear relaxation of 3He in the presence of O2.

Summary of contents for the five cells.Cell no. Volumecm 0. 8995 + 0. 003 0. 884 + 0. 003 0. 881 + 0. 003 0. 9435 + 0.003 0. 840 + 0. 003['He](amagat)5.31 + 0. 055. 23 + 0. 055. 25 + 0. 054.84 + 0. 054.90 + 0. 05 [02](amagat) 0. 969 + 0. 0047.92 + 0. 02 3. 97+ 0. 01 1. 856 + 0. 0060intermolecular interaction length, it is straightforward to show that this condition holds for total gas densities up to at least several tens of amagats.For our experiment, a set of five sealed cells ( 1 cms)made of Corning 7740 (Pyrex™) glass were prepared on a high-purity gas-handling system using techniques sim-ilar to those detailed in [7, 8]. The contents of each cellare summarized in Table I. The cells were filled suc-cessively through a single glass manifold attached to thegas-handling system. Before filling, each cell was firstcooled to & 20 K by a small Bowing-liquid-helium De-war. The appropriate quantity of oxygen, admitted &om a calibrated volume at a known temperature and pres-sure, was then allowed