Pressure Dependence of Wall Relaxation in Polarized ${}^3$He Gaseous Cells

Abstract

We have observed a linear pressure dependence of longitudinal relaxation time ($T_1$) at 4.2 K and 295 K in gaseous ${}^3$He 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 ${}^3$He 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.

References in corpus (4)

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Cited by in corpus (1)

• Gaseous ${}^3$He Nuclear Magnetic Resonance Probe for Cryogenic Environments