Nuclear Relaxation in Adulterated Hydrogen

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Abstract
The proton spin‐lattice relaxation time T1 has been measured in normal hydrogen and in mixtures with 12 other gases as a function of density and composition at room temperature. Cross sections for mJ transitions of the H2 molecule deduced from the Bloembergen—Schwinger formula are interpreted qualitatively on the basis of electric multipole moments as measures of the anisotropy of the intermolecular forces, using the transient approximation. This approximation is justified in the case of H2–CO2 mixtures on the basis of the temperature dependence of T1. The assumptions of the Bloemberger—Schwinger formula are discussed, and an experiment is proposed to determine the connection between two correlation times which appear in the theory.

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