Hyperfine structure of the hydroxyl free radical (OH) in electric and magnetic fields

Abstract

We investigate single-particle energy spectra of the hydroxyl free radical (OH) in the lowest electronic and rovibrational level under combined static electric and magnetic fields, as an example of heteronuclear polar diatomic molecules. In addition to the fine-structure interactions, the hyperfine interactions and centrifugal distortion effects are taken into account to yield the zero-field spectrum of the lowest ${}^2{\Pi }_{3/2}$ manifold to an accuracy of less than 2 kHz. We also examine level crossings and repulsions in the hyperfine structure induced by applied electric and magnetic fields. Compared to previous work, we found more than 10 percent reduction of the magnetic fields at level repulsions in the Zeeman spectrum subjected to a perpendicular electric field. It is important to take into account hyperfine structure when we investigate physics of OH molecules at micro-Kelvin temperatures and below.

34 pages, 12 figures

References in corpus (8)

• Bose-Einstein Condensation of Erbium
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Stabilizing a purely dipolar quantum gas against collapse
• Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate
• Spontaneous spin textures in dipolar spinor condensates
• Phase space deformation of a trapped dipolar Fermi gas
• OH hyperfine ground state: from precision measurement to molecular qubits
• Can Spinor Dipolar Effects be Observed in Bose-Einstein Condensates?

Cited by in corpus (6)

• Controlling Spin-flips of Molecules in an Electromagnetic Trap
• Towards accurate spin-orbit splittings from relativistic multireference electronic structure theory
• A New Design for a Traveling-Wave Zeeman Decelerator: II. Experiment
• Orientation and Alignment Dynamics of Polar Molecule Driven by Shaped Laser Pulses
• Universal stereodynamics of cold atom-molecule collisions in electric fields
• Effects of Conical Intersections on Hyperfine Quenching of Hydroxyl OH in collision with an ultracold Sr atom