Close-Coupling Calculations of Spin-Polarized Hydrogen-Deuterium Collisions

Close-coupling calculations on the atomic collisions at cryogenic energies in a 100-kG magnetic field between spin-polarized hydrogen (H{↑}) and deuterium (D{↑}) have demonstrated the resonant spin-flip process postulated by Stwalley and the importance of minimizing the presence of D{↑} in the experimental preparations of bulk H{↑} currently in progress. Other interesting features are presented and briefly discussed including multiple Ramsauer-Townsend effects and direct electron and nuclear single- and double-spin-flip processes.