High-Resolution Spectroscopy of the X-A Transition of the Carbon Monoxide Dication CO$^{2+}$
- URL: http://arxiv.org/abs/2601.01933v1
- Date: Mon, 05 Jan 2026 09:35:55 GMT
- Title: High-Resolution Spectroscopy of the X-A Transition of the Carbon Monoxide Dication CO$^{2+}$
- Authors: X. Huet, A. Aerts, N. Vaeck, M. Génévriez, X. Urbain,
- Abstract summary: We report rovibronic spectra of the A $3+$($v'=0-2$) - X $3_(v=0)$ rovibronic transitions in CO$2+$ doubly-charged molecular ion.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We report rovibronic spectra of the A $^3Σ^+$($v'=0-2$) - X $^3Π_Ω(v=0)$ rovibronic transitions ($|Ω|=0, 1$ and 2) of the CO$^{2+}$ doubly-charged molecular ion. Spectra were recorded at high resolution ($\sim 5$~cm$^{-1}$) in a fast beam of CO$^{2+}$ molecules by detecting the Coulomb explosion of the molecules upon excitation to the A state. Measurements were guided by \textit{ab initio} calculations which then assisted the assignment of the observed spectral features. Our results resolve the spin-orbit splittings of the ground vibronic state X $^3Π_Ω(v=0)$, but not the rotational structure of the bands due to spectral congestion, and provide spectroscopic information on CO$^{2+}$ with unprecedented resolution. In doing so they expand our knowledge of this benchmark doubly charged molecular ion and expand the short list of doubly charged molecules studied at high resolution.
Related papers
- Hyperfine-resolved optical spectroscopy of ultracold $^{87}$Rb$^{133}$Cs molecules: the $\mathrm{b}^3Π_0$ metastable state [2.0722018747867867]
We perform hyperfine-resolved spectroscopy of transitions from the vibronic ground state to the lowest rovibrational states of the electronic state.<n>These transitions are spin forbidden, resulting in narrow linewidths, and feature near-diagonal Franck-Condon factors.<n>We develop a model of the hyperfine and Zeeman structure that includes coupling between the $0+$ and $0-$ components.
arXiv Detail & Related papers (2025-10-28T17:24:07Z) - Excitations of N$_{2 }$ and O$_{2}$ molecules due to helium ion impact
and a polarization effect [0.0]
We present an experimental study of the dissociative excitation in the collision of helium ions with nitrogen and oxygen molecules.
The emission of excited dissociative products was detected using an improved high-resolution optical spectroscopy method.
arXiv Detail & Related papers (2023-12-27T18:42:48Z) - Ion-molecule reactions below 1~K: Observation of a strong enhancement of
the reaction rate of the ion-dipole reaction He$^+$+ CH$_3$F [55.41644538483948]
Reaction between He$+$ and CH$_3$F forming predominantly CH$+$ and CHF$+$.
To avoid heating of the ions by stray electric fields, the reaction was observed within the orbit of a highly excited Rydberg electron.
arXiv Detail & Related papers (2021-12-22T17:32:43Z) - Spectroscopic characterization of the a$^3\Pi$ state of aluminum
monofluoride [0.9485862597874625]
All $Q$ lines of the strong A$1Pi$ $leftarrow$ X$1Sigma+$ transition around 227nm are rotationally closed.
The same holds for the narrow, spin-forbidden a$3Pi$ $leftarrow$ X$1Sigma+$ transition around 367 nm.
arXiv Detail & Related papers (2021-12-17T13:09:37Z) - Unsupervised Spectral Unmixing For Telluric Correction Using A Neural
Network Autoencoder [58.720142291102135]
We present a neural network autoencoder approach for extracting a telluric transmission spectrum from a large set of high-precision observed solar spectra from the HARPS-N radial velocity spectrograph.
arXiv Detail & Related papers (2021-11-17T12:54:48Z) - Observation of Chemical Reactions between a Trapped Ion and Ultracold
Feshbach Dimers [0.0]
We measure chemical reactions between a single trapped $174$Yb$+$ ion immersed in an ultracold bath of $6$Li atoms.
This produces LiYb$+$ molecular ions that we detect via mass spectrometry.
arXiv Detail & Related papers (2021-10-27T14:42:59Z) - High-resolution 'magic'-field spectroscopy on trapped polyatomic
molecules [62.997667081978825]
Rapid progress in cooling and trapping of molecules has enabled first experiments on high resolution spectroscopy of trapped diatomic molecules.
Extending this work to polyatomic molecules provides unique opportunities due to more complex geometries and additional internal degrees of freedom.
arXiv Detail & Related papers (2021-10-21T15:46:17Z) - Rovibrational structure of the Ytterbium monohydroxide molecule and the
$\mathcal{P}$,$\mathcal{T}$-violation searches [68.8204255655161]
The energy gap between levels of opposite parity, $l$-doubling, is of a great interest.
The influence of the bending and stretching modes on the sensitivities to the $mathcalP$,$mathcalT$-violation requires a thorough investigation.
arXiv Detail & Related papers (2021-08-25T20:12:31Z) - Characterization of the lowest excited-state ro-vibrational level of
$^{23}$Na$^{87}$Rb [2.0575351445652057]
We investigate the lowest ro-vibrational level of the $b3Pi$ state with high resolution laser spectroscopy.
This electronic spin-forbidden $X1Sigma+ leftrightarrow b3Pi$ transition features a nearly diagonal Franck-Condon factor.
arXiv Detail & Related papers (2021-08-02T04:28:53Z) - Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using
Quantum Logic [52.77024349608834]
We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes.
We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies.
We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
arXiv Detail & Related papers (2021-02-24T17:46:15Z) - Unresolved sideband photon recoil spectroscopy of molecular ions [0.0]
We present a general framework for simulating the expected photon recoil spectra in spectroscopy regimes.
We present two complementary cases: spectroscopy of the broad 3s $2$S$_1/2$ - 3p $2$P$_3/2$ electronic transition.
The atomic ion has been picked to introduce a simple system to make comparisons with experimental results.
arXiv Detail & Related papers (2020-04-06T19:34:41Z) - Anisotropy-mediated reentrant localization [62.997667081978825]
We consider a 2d dipolar system, $d=2$, with the generalized dipole-dipole interaction $sim r-a$, and the power $a$ controlled experimentally in trapped-ion or Rydberg-atom systems.
We show that the spatially homogeneous tilt $beta$ of the dipoles giving rise to the anisotropic dipole exchange leads to the non-trivial reentrant localization beyond the locator expansion.
arXiv Detail & Related papers (2020-01-31T19:00:01Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.