A quantitative investigation of the dynamic nuclear polarization effect by fixed paramagnetic centra of abundant and rare spins in solids at room temperature
Abstract
The existing theory of the dynamic nuclear polarization (DNP) effect by fixed paramagnetic centra in solids is extended to make it also valid for systems where spin-diffusion among the polarized spins is neglectable. The theory is quantitatively compared with measurements at room temperature of the 1H- and 13C-DNP enhancement of polystyrene doped with free radicals. Easy-to-use formulas are derived which can be used to get an estimate of the DNP enhancement.
- Publication:
-
Physica B+C
- Pub Date:
- March 1986
- DOI:
- 10.1016/0378-4363(86)90503-6
- Bibcode:
- 1986PhyBC.138..147D