Kinetic Theory–Memory Equation Approach to Nuclear Magnetic Relaxation in Molecular Gases. II. Application to Hydrogen

Abstract

The kinetic theory–memory equation kernel obtained in the preceding paper is evaluated for molecular hydrogen at 296 K in a 'single relaxation time' approximation and the low density T1 vs. ρ curve in the region of the T1 minimum (as predicted by a fit of the theoretical expression for the high density linear slope T1/ρ) is compared with the most recent and accurate experimental results. Excellent agreement is found over the entire nonlinear region. The cross sections extracted for the spin-rotation and dipolar contributions to the relaxation time T1 are found to have the values σsr = 0.493 Å2 and σd = 0.457 Å2, consisting in the main of pure reorientation contributions (~90% in each case).