Motivated by the observation of the predissociation of H2
triplet states in low vibrational levels, we evaluate the contribution of triplet
dissociative states to the low-energy dissociative recombination of H2+ in vibrational levels where
v = 0, 1.
The triplet states contribute mainly via radial couplings between monoexcited
Rydberg configurations without curve crossings. The total contribution of the six
triplet states leading to dissociation in H(n = 1) + H(n = 2)
is found to be smaller by at least one order of magnitude than the contribution of the
lowest doubly excited singlet state, (2pσu)2 1 Σ
g+.
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