Unimolecular processes in diatomic carbon anions at high rotational excitation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F24%3A00600197" target="_blank" >RIV/61388955:_____/24:00600197 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0357551" target="_blank" >https://hdl.handle.net/11104/0357551</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevA.110.042828" target="_blank" >10.1103/PhysRevA.110.042828</a>
Alternative languages
Result language
angličtina
Original language name
Unimolecular processes in diatomic carbon anions at high rotational excitation
Original language description
On the millisecond to second time scale, stored beams of diatomic carbon anions C<sub>2</sub><sup>− </sup>from a sputter ion source feature unimolecular decay of yet unexplained origin by electron emission and fragmentation. To account for the magnitude and time dependence of the experimental rates, levels with high rotational and vibrational excitation are modeled for the lowest electronic states of C<sub>2</sub><sup>−</sup>, also including the lowest quartet potential. Energies, spontaneous radiative decay rates (including spin-forbidden quartet-level decay), and tunneling dissociation rates are determined for a large number of highly excited C<sub>2</sub><sup>−</sup> levels and their population in sputter-type ion sources is considered. For the quartet levels, the stability against autodetachment is addressed and recently calculated rates of rotationally assisted autodetachment are applied. Non-adiabatic vibrational autodetachment rates of high vibrational levels in the doublet C<sub>2</sub><sup>−</sup> ground potential are also calculated. The results are combined to model the experimental unimolecular decay signals. Comparison of the modeled to the experimental rates measured at the Croygenic Storage Ring (CSR) gives strong evidence that C<sub>2</sub><sup>− </sup>ions in quasi-stable levels of the quartet electronic states are the so far unidentified source of unimolecular decay.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
<a href="/en/project/GA21-12598S" target="_blank" >GA21-12598S: Theory for dissociative recombination of cold molecular ions</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review A
ISSN
2469-9926
e-ISSN
2469-9934
Volume of the periodical
110
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
27
Pages from-to
042828
UT code for WoS article
001350238400001
EID of the result in the Scopus database
2-s2.0-85208658302