Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level
A theoretical electronic structure calculation of the ZrH molecule is conducted via ab initio Complete Active Space Self-Consistent Field and the Multireference Configuration Interaction with Davidson correction calculation (CASSCF/MRCI + Q). The adiabatic potential energy curves (PECs) for the 53 l...
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Frontiers Media S.A.
2025-07-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2025.1603873/full |
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| author | Ghina Chamieh Lokman Awad Nayla El-Kork Mahmoud Korek |
| author_facet | Ghina Chamieh Lokman Awad Nayla El-Kork Mahmoud Korek |
| author_sort | Ghina Chamieh |
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| description | A theoretical electronic structure calculation of the ZrH molecule is conducted via ab initio Complete Active Space Self-Consistent Field and the Multireference Configuration Interaction with Davidson correction calculation (CASSCF/MRCI + Q). The adiabatic potential energy curves (PECs) for the 53 low-lying electronic states in the representations of 2s+1Λ(+/−) and Ω(+/−) for ZrH molecule have been investigated along with the internuclear distance Re, the harmonic frequency ωe, the dipole moment μ, the rotational constant Be and the electronic transition energy with respect to the ground state Te. are calculated. By using the canonical function approach, the vibrational energy Ev, the rotational constants Bv, the centrifugal constants Dv, and the turning points Rmin and Rmax have been calculated up to the vibrational level v = 18. Based on the investigated data, the Franck−Condon factors, the Einstein coefficient, the radiative lifetimes, and the vibrational branching ratio for the transitions X2Δ3/2 - (1)4Φ3/2, X2Δ3/2 - (1)4Φ5/2, X2Δ3/2 - (1)2Π3/2 have been calculated. The large value of the radiative lifetimes in (ms) for these transitions proves that this molecule is not a good candidate for direct laser cooling. |
| format | Article |
| id | doaj-art-ff40f358c04547429cec694a71958a9d |
| institution | DOAJ |
| issn | 2296-2646 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Chemistry |
| spelling | doaj-art-ff40f358c04547429cec694a71958a9d2025-08-20T02:48:17ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462025-07-011310.3389/fchem.2025.16038731603873Theoretical laser cooling feasibility study of ZrH molecule at the fine structure levelGhina Chamieh0Lokman Awad1Nayla El-Kork2Mahmoud Korek3Faculty of Science, Beirut Arab University, Beirut, LebanonFaculty of Science, Beirut Arab University, Beirut, LebanonDepartment of Physics, Khalifa University, Abu Dhabi, United Arab EmiratesFaculty of Science, Beirut Arab University, Beirut, LebanonA theoretical electronic structure calculation of the ZrH molecule is conducted via ab initio Complete Active Space Self-Consistent Field and the Multireference Configuration Interaction with Davidson correction calculation (CASSCF/MRCI + Q). The adiabatic potential energy curves (PECs) for the 53 low-lying electronic states in the representations of 2s+1Λ(+/−) and Ω(+/−) for ZrH molecule have been investigated along with the internuclear distance Re, the harmonic frequency ωe, the dipole moment μ, the rotational constant Be and the electronic transition energy with respect to the ground state Te. are calculated. By using the canonical function approach, the vibrational energy Ev, the rotational constants Bv, the centrifugal constants Dv, and the turning points Rmin and Rmax have been calculated up to the vibrational level v = 18. Based on the investigated data, the Franck−Condon factors, the Einstein coefficient, the radiative lifetimes, and the vibrational branching ratio for the transitions X2Δ3/2 - (1)4Φ3/2, X2Δ3/2 - (1)4Φ5/2, X2Δ3/2 - (1)2Π3/2 have been calculated. The large value of the radiative lifetimes in (ms) for these transitions proves that this molecule is not a good candidate for direct laser cooling.https://www.frontiersin.org/articles/10.3389/fchem.2025.1603873/fullspectroscopic constantsspin-orbit coupling effectlaser coolingfranck-condon factorsradiative lifetime |
| spellingShingle | Ghina Chamieh Lokman Awad Nayla El-Kork Mahmoud Korek Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level Frontiers in Chemistry spectroscopic constants spin-orbit coupling effect laser cooling franck-condon factors radiative lifetime |
| title | Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level |
| title_full | Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level |
| title_fullStr | Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level |
| title_full_unstemmed | Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level |
| title_short | Theoretical laser cooling feasibility study of ZrH molecule at the fine structure level |
| title_sort | theoretical laser cooling feasibility study of zrh molecule at the fine structure level |
| topic | spectroscopic constants spin-orbit coupling effect laser cooling franck-condon factors radiative lifetime |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2025.1603873/full |
| work_keys_str_mv | AT ghinachamieh theoreticallasercoolingfeasibilitystudyofzrhmoleculeatthefinestructurelevel AT lokmanawad theoreticallasercoolingfeasibilitystudyofzrhmoleculeatthefinestructurelevel AT naylaelkork theoreticallasercoolingfeasibilitystudyofzrhmoleculeatthefinestructurelevel AT mahmoudkorek theoreticallasercoolingfeasibilitystudyofzrhmoleculeatthefinestructurelevel |