The dissociative recombination of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" display="inline" overflow="scroll"><mml:mrow><mml:msubsup><mml:mrow><mml:mtext>H</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msubsup></mml:mrow></mml:math> – a saga coming to an end?

Larsson, Mats; McCall, Benjamin J.; Orel, A. E.

doi:10.1016/j.cplett.2008.06.069

Cited by 39 publications

(34 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are two major reasons for the persistent attention to this subject. First, the understanding of the dissociation mechanisms is of crucial importance for determining the rate of dissociative recombination of H + 3 in interstellar clouds, which is decisive for the production rate of various molecules [13][14][15][16][17][18]. Second, H 3 represents an ideal prototype for the in-depth study of the fundamental predissociation mechanisms of polyatomic molecules [1,2,10,19].…”

Section: Introductionmentioning

confidence: 99%

Formation of fragment momentum correlations in three-body predissociation of triatomic hydrogen: The interplay of geometry-dependent nonadiabatic coupling and ground-state dynamics

Galster

2010

Phys. Rev. A

View full text Add to dashboard Cite

Momentum correlations in three-body predissociation of triatomic hydrogen are investigated by quasiclassical trajectory calculations. It is shown that nonadiabatic couplings that trigger predissociation of the 2sA 1 state of H 3 imprint their geometric properties on the momentum correlation structures observed after dissociation. A simple symmetry-based model of the geometric coupling properties succeeds in reproducing most of the experimentally observed patterns. The ground-state dynamics that transform the geometric properties of the coupling into the final momentum correlations are identified.

show abstract

Section: Introductionmentioning

confidence: 99%

Formation of fragment momentum correlations in three-body predissociation of triatomic hydrogen: The interplay of geometry-dependent nonadiabatic coupling and ground-state dynamics

Galster

2010

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…3 The search for the H 3 + DR rate coefficient has had a somewhat turbulent history, with values that varied by orders of magnitude. 4,5 The measurement of rotationally cold H 3 + at CRYRING in 2002, 6 together with complete dimensionality quantum mechanical calculations, 7 has finally brought some level of closure to the debate. In fact, the CRYRING data were recently used to observationally determine the cosmic ray ionization rate in diffuse clouds.…”

mentioning

confidence: 99%

Dissociative recombination of highly enriched para-H3+

Tom

Zhaunerchyk

Wiczer

et al. 2009

The Journal of Chemical Physics

View full text Add to dashboard Cite

The determination of the dissociative recombination rate coefficient of H(3) (+) has had a turbulent history, but both experiment and theory have recently converged to a common value. Despite this convergence, it has not been clear if there should be a difference between the rate coefficients for ortho-H(3) (+) and para-H(3) (+). A difference has been predicted theoretically and could conceivably impact the ortho:para ratio of H(3) (+) in the diffuse interstellar medium, where H(3) (+) has been widely observed. We present the results of an experiment at the CRYRING ion storage ring in which we investigated the dissociative recombination of highly enriched ( approximately 83.6%) para-H(3) (+) using a supersonic expansion source that produced ions with T(rot) approximately 60-100 K. We observed an increase in the low energy recombination rate coefficient of the enriched para-H(3) (+) by a factor of approximately 1.25 in comparison to H(3) (+) produced from normal H(2) (ortho:para=3:1). The ratio of the rate coefficients of pure para-H(3) (+) to that of pure ortho-H(3) (+) is inferred to be approximately 2 at low collision energies; the corresponding ratio of the thermal rate coefficients is approximately 1.5 at electron temperatures from 60 to 1000 K. We conclude that this difference is unlikely to have an impact on the interstellar ortho:para ratio of H(3) (+).

show abstract

“…Larsson et al [24] asked whether the 'saga' of H + 3 recombination had come to an end and conclude that it is not quite finished. Further surprises may indeed come, but I think we now have a better idea where the remaining pieces of the puzzle belong.…”

Section: Discussionmentioning

confidence: 99%