Out-of-phase PELDOR
| Autor: | Andriy Marko, Thomas F. Prisner, Vasyl Denysenkov |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
education.field_of_study
Zeeman effect Spins Condensed matter physics Chemistry Population Biophysics Interaction energy Condensed Matter Physics Resonance (particle physics) Magnetic field law.invention symbols.namesake law Boltzmann constant symbols Physical and Theoretical Chemistry Atomic physics education Electron paramagnetic resonance Molecular Biology |
| Zdroj: | Molecular Physics. 111:2834-2844 |
| ISSN: | 1362-3028 0026-8976 |
| DOI: | 10.1080/00268976.2013.807369 |
| Popis: | Pulsed electron–electron double resonance (PELDOR) is a method frequently used to determine the structure of bio-macromolecule on a nanometre scale. Usually PELDOR experiments are carried out in the high-temperature limit, when the Boltzmann population of spins oriented parallel and antiparallel to the external magnetic field are almost equal. Also the well-developed theories describing PELDOR apply to this case. However, the high-temperature conditions are no more fulfilled for experiments done in a high magnetic field (above 6 T) and at low temperatures (below 5 K), when the Zeeman interaction energy of an electron spin becomes comparable with thermal energy . In this work we demonstrate that PELDOR signals measured at these conditions differ from the usual PELDOR signals. Additional to the standard in-phase component the PELDOR signal at low temperature and high magnetic field also contains an out-of-phase component that disappears in the high-temperature limit. This means that we observe not only the ... |
| Databáze: | OpenAIRE |
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