Abstract

Spin-aligned hydrogen (H \ensuremath{\uparrow}) and deuterium (D \ensuremath{\uparrow}) are generally predicted to be stable for $\frac{\mathcal{H}}{T}\ensuremath{\gtrsim}{10}^{6}$ G/K. Magnetic-field-dependent resonances (inverse to field-induced predissociations of high vibrational-rotational levels of HD and ${\mathrm{D}}_{2}$) provide exceptions to this general rule. Their existence suggests 50 kG (H \ensuremath{\uparrow} + D \ensuremath{\uparrow}) and 19 kG (D \ensuremath{\uparrow} + D \ensuremath{\uparrow}) should be avoided for stable H \ensuremath{\uparrow} and D \ensuremath{\uparrow}. Induced predissociation observations should yield ultraprecise resonance information and dissociation limits.

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