Regular Article - Theoretical Physics
Modeling alignment enhancement for solid polarized targets
University of Virginia, 22901, Charlottesville, VA, USA
* e-mail: email@example.com
Accepted: 26 June 2017
Published online: 26 July 2017
A model of dynamic orientation using optimized radiofrequency (RF) irradiation produced perpendicular to the holding field is developed for the spin-1 system required for tensor-polarized fixed-target experiments. The derivation applies to RF produced close to the Larmor frequency of the nucleus and requires the electron spin-resonance linewidth to be much smaller than the nuclear magnetic resonance frequency. The rate equations are solved numerically to study a semi-saturated steady-state resulting from the two sources of irradiation: microwave from the DNP process and the additional RF used to manipulate the tensor polarization. The steady-state condition and continuous-wave NMR lineshape are found that optimize the spin-1 alignment in the polycrystalline materials used as solid polarized targets in charged-beam nuclear and particle physics experiments.
© SIF, Springer-Verlag GmbH Germany, 2017