Quantum mechanics is an extremely successful theory that agrees with every experimental
test. However, the principle of linear superposition, a central tenet of the theory, apparently …

Diffuse interstellar clouds have long been thought to be relatively devoid of molecules,
because of their low densities and high radiation fields. However, in the past ten years or so …

Observations of H+ 3 in the Galactic diffuse interstellar medium have led to various
surprising results, including the conclusion that the cosmic-ray ionization rate (ζ 2) is about …

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Within the precise cosmological framework provided by the Λ-cold dark matter model and
standard Big Bang nucleosynthesis, the chemical evolution of the pregalactic gas can now …

Multipole radiofrequency ion traps are a highly versatile tool to study molecular ions and
their interactions in a well-controllable environment. In particular the cryogenic 22-pole ion …

Context. The high degree of deuteration observed in some prestellar cores depends on the
ortho-to-para H 2 ratio through the H $ _3^+ $ fractionation. Aims. We want to constrain the …

The history of H3+ is a succession of inspiring discoveries, grueling hard work, big surprises,
and many puzzles and mistakes with their unexpected resolutions. It is a showcase …

This review covers the work of the three decades since the first spectroscopic identification
of the H 3+ molecular ion outside of the laboratory in 1988, in the auroral atmosphere of the …

The article presents calculated dissociative recombination (DR) rate coefficients for H 3+⁠.
The previous theoretical work on H 3+ was performed using the adiabatic hyperspherical …