Dynamic Nuclear Polarization by Thermal Mixing Under Partial Saturation |
| |
Authors: | Sami Jannin Arnaud Comment J J van der Klink |
| |
Institution: | 1. Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Batochime, 1015, Lausanne, Switzerland 2. Institute of Physics of Biological Systems, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
|
| |
Abstract: | We describe a low-temperature thermodynamic model for dynamic nuclear polarization (DNP) via continuous-wave partial saturation of electron spin resonance (ESR) lines that are both homogeneously and inhomogeneously broadened. It is a variant of a reasoning proposed by Borghini, which in turn used Redfield’s thermodynamic treatment of saturation. Our variant is furthermore based on Provotorov’s insight that under partial saturation of a coupled-spin system two distinct spin temperatures should appear in a thermodynamical theory. We apply our model to DNP results obtained at a temperature of 1.2?K and in magnetic fields of 3.35 and 5?T on 1-13C labeled sodium acetate dissolved in a frozen D2O/ethanol-d6 solution doped with the free radical TEMPO. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|