Probehead with interchangeable loop‐gap resonators and rf coils for multifrequency EPR/ENDOR
作者:
T. Christides,
W. Froncisz,
T. Oles,
James S. Hyde,
期刊:
Review of Scientific Instruments
(AIP Available online 1994)
卷期:
Volume 65,
issue 1
页码: 63-67
ISSN:0034-6748
年代: 1994
DOI:10.1063/1.1144747
出版商: AIP
数据来源: AIP
摘要:
A probehead employing interchangeable loop‐gap resonators and rf coils for multifrequency EPR/ENDOR spectroscopy from 1 to 10 GHz is described. A precision coupling mechanism allows accurate magnetic coupling of the microwaves to the resonators. The Rexolite©support of the resonator acts as a spool for the ENDOR coil. rf fields of 1.0 mT are generated. The coil and resonator can be easily changed to cover the range of 1–10 GHz. Liquid‐phase ENDOR spectra of the stable free‐radical galvanoxyl and of the spin label TEMPONE (4‐oxo‐2,2,6,6‐tetramethyl‐l‐piperidine‐N‐oxyl) dissolved inn‐heptane are shown. The ENDOR enhancement for nitrogen from TEMPONE is 15 times larger at 2.3 than at 9.3 GHz due to the rf enhancement.
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