Lasercooled RaF as a promising candidate to measure molecular parity violation

Details Lasercooled RaF as a promising candidate to measure molecular parity violation Lasercooled RaF as a promising candidate to measure molecular parity violation

2010-07-11

arxiv.org/abs/1007.1788v2

Phys. Rev. A 82 (2010) 052521

Physics

Chemical Physics

4.5 pages, 1 figure, 2 tables. Supplementary material can be requested from the authors. Minor changes to version 1

Scientific paper

10.1103/PhysRevA.82.052521

The parameter $W_\mathrm{a}$, which characterizes nuclear spin-dependent parity violation effects within the effective molecular spin-rotational Hamiltonian, was computed for the electronic ground state of radium fluoride (RaF) and found to be one of the largest absolute values predicted so far. These calculations were performed with the complex generalised Hartree-Fock method within a two-component (quasi-relativistic) zeroth-order regular approximation framework. Peculiarities of the molecular electronic structure of RaF lead to highly diagonal Franck-Condon matrices between vibrational states of the electronic ground and first excited states, which renders the molecule in principle suitable for direct laser cooling. As a trapped gas of cold molecules offers a superior coherence time, RaF can be considered a promising candidate for high-precision spectroscopic experiments aimed at the search of molecular parity-violation effects.

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