The Lithium problem with Iram, Osse, and INTEGRAL

Signore, M.; Védrenne, G.; Bernardis, P. de; Дубрович, В. К.; Encrenaz, P.; Maoli, R.; Masi, S.; Mastrantonio, G.; Melchiorri, B.; Melchiorri, F.; Tanzilli, P.

doi:10.1086/192010

Cited by 36 publications

(25 citation statements)

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“…and the resulting products undergo ro-vibrational relaxations. These LiH/ LiH + molecules are proposed to have a significant role in the cooling process of the early universe and cosmic background radiation [3][4][5][6], though the very low abundance of these species raised several doubts on this claim [7][8][9][10]. The abundance of LiH + in the cosmic environment is expected to be relatively more than the neutral species because of the low ionization potential of LiH molecule [9].…”

Section: Introductionmentioning

confidence: 99%

H + LiH + collision dynamics at ultracold temperature conditions

Roy

Mahapatra

2015

Chemical Physics

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Section: Introductionmentioning

confidence: 99%

H + LiH + collision dynamics at ultracold temperature conditions

Roy

Mahapatra

2015

Chemical Physics

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“…[1][2][3][4][5][6] Many experimental and theoretical studies about the formation and depletion reaction of LiH and its ionic variants were reported.…”

Section: Introductionmentioning

confidence: 99%

Coriolis Coupling Influence on the H+LiH Reaction

Zhai¹,

Li²,

Liu³

2014

Bulletin of the Korean Chemical Society

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We have reported the reaction probability, integral reaction cross section, and rate constant for the title system calculated with the aid of a time-dependent wave packet approach. The ab initio potential energy surface (PES) of Prudente et al. (Chem. Phys. Lett. 2009, 474, 18) is employed for the purpose. The calculations are carried out over the collision energy range of 0.05-1.4 eV for the two reaction channels of H + LiH  Li + H2 and Hb + LiHa  LiHb + Ha. The Coriolis coupling (CC) effect are taken into account. The importance of including the Coriolis coupling quantum scattering calculations are revealed by the comparison between the Coriolis coupling and the centrifugal sudden (CS) approximation calculations.

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“…In addition to hydrogen, lithium is a key element in cosmology, galatic evolution and stellar models 10 . The reaction of hydrogen and lithium yields probably the first condensed structure in the early universe 11,12 , lithium hydride, which is also of relevance for neutron shielding 13 and hydrogen storage 14 .…”

Section: Introductionmentioning

confidence: 99%

On the Angular Distribution of the H+Li2 Cross Sections: a Converged Time-Independent Quantum Scattering Study

Vila

Ribeiro

Macedo

et al. 2018

Sci Rep

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A thorough time-independent quantum scattering study is performed on a benchmark potential energy surface for the H+Li2 reaction at the fundamental electronic state. Integral and differential cross sections are calculated along with thermal rate coefficients until convergence is reached. Our findings show that vibrational and rotational excitations of the reactant hinder reactivity, though for the latter a considerable reaction promotion was spotted as we increase the reactant rotational quantum number until the critical value of j = 4. Such a promotion then begins to retract, eventually becoming an actual inhibition for larger j. In a straightforward manner, the concept of time-independent methods implemented in this study allowed this accurate state-to-state analysis. Furthermore, a nearly isotropic behaviour of the scattering is noted to take place from the angular point of view. Remarkably, our computational protocol is ideally suited to yield converged thermal rate coefficients, revealing a non-Arrhenius pattern and showing that J-shifting approach fails to describe this particular reaction. Our results, when compared to previous and independent ones, reinforce the latest theoretical reference for future validation in the experimental field.

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The Lithium problem with Iram, Osse, and INTEGRAL

Cited by 36 publications

References 0 publications

H + LiH + collision dynamics at ultracold temperature conditions

H + LiH + collision dynamics at ultracold temperature conditions

Coriolis Coupling Influence on the H+LiH Reaction

On the Angular Distribution of the H+Li2 Cross Sections: a Converged Time-Independent Quantum Scattering Study

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