Quadrature Fourier transform NMR detection has been employed to study the disorder-order transition in high J=1 concentration solid hydrogen and deuterium. In solid ${\mathit{H}}_2$, where the ortho-para conversion is rapid, quick measurements were made possible by computer batch files containing pulse programs. Newly obtained order parameters were compared with those from the so-called quadrupole glass phase. In addition, peculiar emission of power was detected and regarded as characteristic of the long-range order which distinguishes it from the local order in the quadrupole glass phase.

• Received 1 July 1994

DOI:https://doi.org/10.1103/PhysRevB.50.15602