THE IONIC PATHWAYS OF LITHIUM CHEMISTRY IN THE EARLY UNIVERSE: QUANTUM CALCULATIONS FOR LiH{sup +} REACTING WITH H
- Department of Chemistry and CNISM, University of Rome 'Sapienza', P.le A. Moro 5, 00185 Rome (Italy)
- Insitute de Sciences Moleculaires, University of Bordeaux, 351 Cours de la Liberation, 33405 Talence, Cedex (France)
To better understand the overall role of lithium chemistry in the early universe, reactive quantum calculations involving LiH{sup +} have been carried out and rate coefficients have been obtained. The reactive quantum calculations have been performed using a negative imaginary potential method. Infinite-order sudden approximation and the coupled state approximation have been used to simplify the angular coupling dynamics. Rate coefficients are obtained from the reactive cross sections by further integration over Boltzmann distribution of velocities. The results from the present calculations suggest that, at low redshifts (z), LiH{sup +} should be amenable to observation as imprinted on the cosmic background radiation, in contrast with its neutral counterpart. At higher z, the ionic species may disappear through both depletion reaction and three-body break-up processes.
- OSTI ID:
- 21392251
- Journal Information:
- Astrophysical Journal, Vol. 708, Issue 2; Other Information: DOI: 10.1088/0004-637X/708/2/1560; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
Similar Records
State-to-state quantum wave packet dynamics of the LiH + H reaction on two AB initio potential energy surfaces
Rotationally inelastic collisions of LiH with He. II. Theoretical treatment of the dynamics
Related Subjects
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
BACKGROUND RADIATION
CROSS SECTIONS
LITHIUM
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
RED SHIFT
SUDDEN APPROXIMATION
THREE-BODY PROBLEM
UNIVERSE
ALKALI METALS
APPROXIMATIONS
CALCULATION METHODS
ELEMENTS
MANY-BODY PROBLEM
METALS
RADIATIONS
SYNTHESIS