Stability of Spin-Aligned Hydrogen at Low Temperatures and High Magnetic Fields: New Field-Dependent Scattering Resonances and Predissociations

Spin-aligned hydrogen (H) and deuterium (D) are generally predicted to be stable for HT10^6 G/K. Magnetic-field-dependent resonances (inverse to field-induced predissociations of high vibrational-rotational levels of HD and D₂) provide exceptions to this general rule. Their existence suggests 50 kG (H + D) and 19 kG (D + D) should be avoided for stable H and D. Induced predissociation observations should yield ultraprecise resonance information and dissociation limits.