Non-Adiabatic Effects in Vibrational Excitation and Dissociative Recombination

1995 ◽  
pp. 227-237 ◽  
Author(s):  
Lesley A. Morgan
Keyword(s):  
Vibrational Excitation ◽  
Dissociative Recombination

Vibrational excitation and dissociative recombination of the LiH + ion

2007 ◽  
Vol 105 (11-12) ◽  
pp. 1565-1574 ◽  
Author(s):  
R. ČurÍk ◽  
C. H. Greene
Keyword(s):  
Vibrational Excitation ◽  
Dissociative Recombination

scholarly journals Dissociative recombination and vibrational excitation of BF+in low energy electron collisions

2016 ◽  
Vol 25 (5) ◽  
pp. 055022 ◽  
Author(s):  
J Zs Mezei ◽  
F Colboc ◽  
N Pop ◽  
S Ilie ◽  
K Chakrabarti ◽  
...  
Keyword(s):  
Vibrational Excitation ◽  
Dissociative Recombination ◽  
Low Energy ◽  
Energy Electron ◽  
Electron Collisions ◽  
Low Energy Electron

Theoretical study of dissociative recombination and vibrational excitation of the ${\mathrm{BF}}_{2}^{+}$ ion by an electron impact

2018 ◽  
Vol 27 (11) ◽  
pp. 115007 ◽  
Author(s):  
Viatcheslav Kokoouline ◽  
Mehdi Ayouz ◽  
János Zsolt Mezei ◽  
Khalid Hassouni ◽  
Ioan F Schneider
Keyword(s):  
Electron Impact ◽  
Theoretical Study ◽  
Vibrational Excitation ◽  
Dissociative Recombination

scholarly journals Reactive collision of electrons with CO+ in cometary coma

2018 ◽  
Vol 615 ◽  
pp. A53 ◽  
Author(s):  
Y. Moulane ◽  
J. Zs. Mezei ◽  
V. Laporta ◽  
E. Jehin ◽  
Z. Benkhaldoun ◽  
...  
Keyword(s):  
Cross Sections ◽  
Vibrational Excitation ◽  
Dissociative Recombination ◽  
Molecular Data ◽  
Molecular Ions ◽  
Rate Coefficients ◽  
Nuclear Dynamics ◽  
Cometary Coma ◽  
Reactive Collisions ◽  
The Cross

Context. In order to improve our understanding of the kinetics of the cometary coma, theoretical studies of the major reactive collisions in these environments are needed. Deep in the collisional coma, inelastic collisions between thermal electrons and molecular ions result in recombination and vibrational excitation, the rates of these processes being particularly elevated due to the high charged particle densities in the inner region. Aims. This work addresses the dissociative recombination, vibrational excitation, and vibrational de-excitation of electrons with CO+ molecular cations. The aim of this study is to understand the importance of these reactive collisions in producing carbon and oxygen atoms in cometary activity. Methods. The cross-section calculations were based on multichannel quantum defect theory. The molecular data sets, used here to take into account the nuclear dynamics, were based on ab initio R-matrix approach. Results. The cross-sections for the dissociative recombination, vibrational excitation, and vibrational de-excitation processes, for the six lowest vibrational levels of CO+ – relevant for the electronic temperatures observed in comets – are computed, as well as their corresponding Maxwell rate coefficients. Moreover, final state distributions for different dissociation pathways are presented. Conclusions. Among all reactive collisions taking place between low-energy electrons and CO+, the dissociative recombination is the most important process at electronic temperatures characterizing the comets. We have shown that this process can be a major source of O(3P), O(1D), O(1S), C(3P) and C(1D) produced in the cometary coma at small cometocentric distances.

Dissociative recombination of cold and its interstellar implications

2006 ◽  
Vol 364 (1848) ◽  
pp. 2953-2963 ◽  
Author(s):  
Benjamin J McCall
Keyword(s):  
Rate Constant ◽  
Vibrational Excitation ◽  
Dissociative Recombination ◽  
Ionization Rate ◽  
Ion Source ◽  
Interstellar Clouds ◽  
Chemical Models ◽  
High Ionization ◽  
Ion Storage ◽  
Diffuse Clouds

plays a key role in interstellar chemistry as the initiator of ion–molecule chemistry. The amount of observed in dense interstellar clouds is consistent with expectations, but the large abundance of seen in diffuse clouds is not easily explained by simple chemical models. A crucial parameter in predicting the abundance of in diffuse clouds is the rate constant for dissociative recombination (DR) with electrons. The value of this constant has been very controversial, because different experimental techniques have yielded very different results, perhaps owing to varying degrees of rotational and vibrational excitation of the ions. If the value of this rate constant under interstellar conditions were much lower than usually assumed, the large abundance could be easily explained. In an attempt to pin down this crucial rate constant, we have performed DR measurements at the CRYRING ion storage ring in Stockholm, using a supersonic expansion ion source to produce rotationally cold ions. These measurements suggest that the DR rate constant in diffuse clouds is not much lower than usually assumed and that the abundant must be due to either a low electron fraction or a high ionization rate.

Dissociative recombination and vibrational excitation of CO+: model calculations and comparison with experiment

2015 ◽  
Vol 24 (3) ◽  
pp. 035005 ◽  
Author(s):  
J Zs Mezei ◽  
R D Backodissa-Kiminou ◽  
D E Tudorache ◽  
V Morel ◽  
K Chakrabarti ◽  
...  
Keyword(s):  
Vibrational Excitation ◽  
Dissociative Recombination ◽  
Model Calculations ◽  
Comparison With Experiment

scholarly journals Theoretical study of ArH+ dissociative recombination and electron-impact vibrational excitation

2018 ◽  
Vol 479 (2) ◽  
pp. 2415-2420 ◽  
Author(s):  
A Abdoulanziz ◽  
F Colboc ◽  
D A Little ◽  
Y Moulane ◽  
J Zs Mezei ◽  
...  
Keyword(s):  
Electron Impact ◽  
Theoretical Study ◽  
Vibrational Excitation ◽  
Dissociative Recombination
Sign in / Sign up

Export Citation Format

Share Document