Ab initio study of radium monofluoride, RaF, as a candidate to search for P- and T,P- violation effects

Abstract

Relativistic ab initio calculations have been performed to assess the suitability of RaF for experimental search of P- and T,P-violating interactions. The parameters of P- and T,P-odd terms of the spin-rotational Hamiltonian have been calculated for the ${}^2\Sigma$ electronic ground state of RaF molecule. They include the parameter $W_a$, which is critical in experimental search for nuclear anapole moment and the parameters $W_d$ and $W_{\mathrm{SP}}$ required to obtain restrictions on the electric dipole moment of the electron and T,P-odd scalar-pseudoscalar interactions, respectively. The parameter $X$ corresponding to the "volume effect" in the T,P$-$odd interaction of the ${}^{223}$Ra nuclear Schiff moment with electronic shells of RaF has also been computed. Spectroscopic and hyperfine structure constants for ${}^{223}$RaF and ${}^{223}$Ra${}^{+}$ have been computed as well, demonstrating the accuracy of the methods employed.

6 pages

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• Improved limit on the permanent electric dipole moment of 199Hg
• Using Molecules to Measure Nuclear Spin-Dependent Parity Violation
• Broadband velocity modulation spectroscopy of HfF^+: towards a measurement of the electron electric dipole moment
• Electron correlation and nuclear charge dependence of parity-violating properties in open-shell diatomic molecules

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