Pressure Dependence of Wall Relaxation in Polarized 3He Gaseous Cells
Abstract
We have observed a linear pressure dependence of longitudinal relaxation time (T1) at 4.2 K and 295 K in gaseous 3He cells made of either bare pyrex glass or Cs/Rb-coated pyrex due to paramagnetic sites in the cell wall. The paramagnetic wall relaxation is previously thought to be independent of 3He pressure. We develop a model to interpret the observed wall relaxation by taking into account the diffusion process, and our model gives a good description of the data.
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