Paper

Ionization potential of radium monofluoride

Yang, X F, Wienholtz, F, Field, R W, Perrett, H A, Kujanpää, S, Dorne, A, Reilly, J R, Borschevsky, A, Heinke, R, Zhou, Y, Wilkins, S G, Breier, A A, Wessolek, J, Bissell, M L, Chrysalidis, K, Flanagan, K T, Kyuberis, A A, Vernon, A R, Binnersley, C L, Cooper, B S, Wang, Q, Koszorús, Á, Pašteka, L F, Ricketts, C M, M Au, Gaul, K, Rothe, S, Gustafsson, F P, Brinson, A J, van den Borne, B, Cocolios, T E, Udrescu, S M, Berger, R, de Groote, R P, Hanstorp, D, Neyens, G, Belošević, I, Lalanne, L, Eliav, E, Giesen, T F, Geldhof, S, Zülch, C, Garcia Ruiz, R F, Sunaga, A, Nichols, M, Franchoo, S

2024

Overview

The ionization potential (IP) of radium monofluoride (RaF) was measured to be 4.969(2)[10] eV, revealing a relativistic enhancement in the series of alkaline earth monofluorides. The results are in agreement with a relativistic coupled-cluster prediction of 4.969[7] eV, incorporating up to quantum electrodynamics corrections. Using the same computational methodology, an improved calculation for the dissociation energy (\\(D_{0}\\)) of 5.54[5] eV is presented. This confirms that radium monofluoride joins the small group of diatomic molecules for which \\(D_{0}>\\mathrm{IP}\\), paving the way for precision control and interrogation of its Rydberg states.

• Publisher: Cornell University Library, arXiv.org
• Subject: Diatomic molecules / Energy of dissociation / Free energy / Heat of formation / Interrogation / Ionization potentials / Quantum electrodynamics / Radium / Relativistic effects / Rydberg states