caa a22 4500 605545219 CHVBK 20210128100935.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00723-014-0609-4 doi (NATIONALLICENCE)springer-10.1007/s00723-014-0609-4 Four-Pulse ELDOR Theory of the Spin ½ Label Pairs Extended to Overlapping EPR Spectra and to Overlapping Pump and Observer Excitation Bands [Elektronische Daten] [K. Salikhov, I. Khairuzhdinov] The current theory of the four-pulse electron double resonance (PELDOR) has been extended to take into account two effects: (1) overlapping of the electron paramagnetic resonance (EPR) spectra of paramagnetic spin ½ particles (spin labels) in pairs and (2) overlapping of the excitation bands by the pump and echo-forming pulses. It has been shown that the PELDOR signal contains additional terms in contrast to the situation considered in the current theory, when the EPR spectra of the spin labels in the pairs and the excitation bands do not overlap. All terms oscillate with the same frequency, which is the characteristic dipolar interaction frequency. The largest additional terms originate from the fact that both spins in pairs can be excited by the echo-forming pulses when the EPR spectra of the partners in pairs overlap essentially. The results of the numerical calculations, which illustrate the possible scale of the effect of these additional terms on the PELDOR signal, are presented. Springer-Verlag Wien, 2014 Salikhov K. Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirsky trakt 10/7, 420029, Kazan, Russian Federation aut Khairuzhdinov I. Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirsky trakt 10/7, 420029, Kazan, Russian Federation aut Applied Magnetic Resonance Springer Vienna 46/1(2015-01-01), 67-83 0937-9347 46:1<67 2015 46 723 https://doi.org/10.1007/s00723-014-0609-4 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-014-0609-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Salikhov K. Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirsky trakt 10/7, 420029, Kazan, Russian Federation aut NATIONALLICENCE 700 1- Khairuzhdinov I. Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Sibirsky trakt 10/7, 420029, Kazan, Russian Federation aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/1(2015-01-01), 67-83 0937-9347 46:1<67 2015 46 723