Formation of gaseous, doubly charged cerium monofluoride CeF$^{2+}$ and its sensitivity to new physics

• URL: http://arxiv.org/abs/2604.26109v1
• Date: Tue, 28 Apr 2026 20:52:45 GMT
• Title: Formation of gaseous, doubly charged cerium monofluoride CeF$^{2+}$ and its sensitivity to new physics
• Abstract summary: Gas-phase fluorinated-cerium molecular ions are formed and identified using the Off-Line Ion Source and TITAN mass measurement facilities at TRIUMF.<n>Quantum chemical calculations are performed on the electronic structure of CeF$2+$, revealing a parallel to that of $229$PaF$3+$.<n>A brief discourse on the specifics of the quantum control of CeF$2+$ is presented which anticipates future searches for symmetry violations.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Tricationic protactinium monofluoride ($^{229}$PaF$^{3+}$) has been proposed as a candidate for probing physics beyond the Standard Model of particle physics. Since studies with $^{229}$PaF$^{3+}$ require significant experimental advances, we exploit the stable, valence-isoelectronic dicationic cerium monofluoride (CeF$^{2+}$) as a surrogate. Gas-phase fluorinated-cerium molecular ions are formed and identified using the Off-Line Ion Source and TITAN mass measurement facilities at TRIUMF. Quantum chemical calculations are performed on the electronic structure of CeF$^{2+}$, revealing a parallel to that of $^{229}$PaF$^{3+}$. Moreover, these calculations provide estimates on the sensitivity of CeF$^{2+}$ itself to various $\mathcal{P,T}$-odd properties. A brief discourse on the specifics of the quantum control of CeF$^{2+}$ is presented which anticipates future searches for symmetry violations.

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