Spin-exchange collisions of submerged shell atoms below 1 Kelvin.

Spin - Exchange Collisions of Submerged Shell Atoms Below

Anisotropic relaxation in spin-exchange collisions of alkali atoms

Spin-exchange optical pumping [1] uses spin-exchange collisions between He atoms and optically pumped Rb atoms to produce large quantities of highly spin-polarized He for a variety of applications, including medical imaging [2] and spin-polarized targets [3]. The efficiency of polarized He production is determined by two fundamental rates: the Rb-He spin-exchange rate and the Rb spinrelaxation ...

Cold magnetically trapped 2 Dg scandium atoms . II . Scattering dynamics

The binary collision dynamics of Dg,3/2 ground state scandium atoms is studied from first principles. We employ 30 coupled diabatic ab initio potentials in a coupled-channels study of the scattering dynamics of cold and ultracold scandium atoms in external magnetic fields. Due to the long-ranged magnetic dipolar interaction, the field dependence of the cross section does not follow the threshol...

Low-noise high-density alkali-metal scalar magnetometer

We present an experimental and theoretical study of a scalar atomic magnetometer using an oscillating field-driven Zeeman resonance in a high-density optically pumped potassium vapor. We describe an experimental implementation of an atomic gradiometer with a noise level below 10 fT Hz−1/2, fractional field sensitivity below 10−9 Hz−1/2, and an active measurement volume of about 1.5 cm3. We show...

Spin controlled atom-ion inelastic collisions

The control of ultracold collisions between neutral atoms is an extensive and successful field of study. The tools developed in this field allow for ultracold chemical reactions to be managed using magnetic fields1, light fields2 and spin-state manipulation of the colliding particles3 among other methods. Control of chemical reactions in ultracold atom-ion collisions is a young and growing fiel...