At the dawn of the Universe, the ions of the light elements produced in the Big Bang nucleosynthesis recombined with each other. In our present study, we have tried to mimic the conditions in the early Universe to show how the recombination process would have led to the formation of the first ever formed diatomic species of the Universe: HeH, as well as the subsequent processes that would have led to the formation of the simplest triatomic species: H . We have also studied some special cases: higher positive charge with fewer number of hydrogen atoms in a dense atmosphere, and the formation of unusual and interesting linear, dicationic He chains beginning from light elements He and H in a positively charged atmosphere. For all the simulations, the nanoreactor () dynamics method has been employed.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8249737 | PMC |
| http://dx.doi.org/10.3389/fchem.2021.679750 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Low temperature dynamics of H + HeH+→ H2+ + He reaction: On the importance of long-range interaction.
J Chem Phys
October 2024
Laboratoire Univers et Particules de Montpellier, Université de Montpellier, UMR-CNRS 5299, 34095 Montpellier Cedex, France.
While the growing realization of the importance of long-range interactions is being demonstrated in cold and ultracold bimolecular collision experiments, their influence on one of the most critical ion-neutral reactions has been overlooked. Here, we address the non-Langevin abrupt decrease observed earlier in the low-energy integral cross-sections and rate coefficients of the astrochemically important H + HeH+→ H2+ + He reaction. We attribute this to the presence of artificial barriers on existing potential energy surfaces (PESs).
View Article and Find Full Text PDFA kernel-based machine learning potential and quantum vibrational state analysis of the cationic Ar hydride (ArH).
Phys Chem Chem Phys
February 2024
Institute of Fundamental Physics (IFF-CSIC), CSIC, Serrano 123, 28006 Madrid, Spain.
One of the most fascinating discoveries in recent years, in the cold and low pressure regions of the universe, was the detection of ArH and HeH species. The identification of such noble gas-containing molecules in space is the key to understanding noble gas chemistry. In the present work, we discuss the possibility of [ArH] existence as a potentially detectable molecule in the interstellar medium, providing new data on possible astronomical pathways and energetics of this compound.
View Article and Find Full Text PDFHeH under Spatial Confinement.
Molecules
December 2022
Department of Physical and Quantum Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
In the present study, the influence of spatial confinement on the bond length as well as dipole moment, polarizability and (hyper)polarizabilities of HeH+ ion was analyzed. The effect of spatial confinement was modelled by cylindrically symmetric harmonic oscillator potential, that can be used to mimic high pressure conditions. Based on the conducted research it was found that the spatial confinement significantly affects the investigated properties.
View Article and Find Full Text PDFInsights Into Chemical Reactions at the Beginning of the Universe: From HeH to H.
Front Chem
June 2021
Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory (CSIR-NCL), Pune, India.
At the dawn of the Universe, the ions of the light elements produced in the Big Bang nucleosynthesis recombined with each other. In our present study, we have tried to mimic the conditions in the early Universe to show how the recombination process would have led to the formation of the first ever formed diatomic species of the Universe: HeH, as well as the subsequent processes that would have led to the formation of the simplest triatomic species: H . We have also studied some special cases: higher positive charge with fewer number of hydrogen atoms in a dense atmosphere, and the formation of unusual and interesting linear, dicationic He chains beginning from light elements He and H in a positively charged atmosphere.
View Article and Find Full Text PDFDynamics of HeHHe Rotational State Changes Induced by Collision with He: A Possible New Path in Early Universe Chemistry.
J Phys Chem A
May 2021
Institut fur Ionen Physik und Angewandte Physik, Leopold-Franzens-Universitat, Technikerstrasse 25, 6020 Innsbruck, Austria.
Ab initio calculations are employed to generate the rigid rotor (RR) potential energy surface (PES) describing the interaction of the linear molecular cation HeHHe, at its equilibrium geometry, with the neutral He atom. The resulting interaction is employed to investigate the efficiency of rotational state-changing collisions at the temperatures relevant to the early universe conditions, where the latter molecule has been postulated to exist, albeit not yet observed. The inelastic rate coefficients are found to be fairly large and are compared with those found for another important cation just recently observed in the interstellar medium: the HeH polar molecule.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!