Electron spin resonance spectroscopy

Details Electron spin resonance spectroscopy Electron spin resonance spectroscopy

1990-01-23

1991-02-19

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using an electron resonance spectrometer system

324308, G01R 3324

Patent

active

049947451

ABSTRACT:
There is disclosed a method of accurately calculating the magnetic field strength at an arbitrary position in an ESR (electron spin resonance) spectrum using Mn.sup.2+ marker. The spectrum contains an ESR signal arising from an unknown sample and an ESR signal arising from a reference sample containing Mn.sup.2+ marker. The resonating magnetic field strengths H.sub.ci and H.sub.cj of two absorption lines of the six absorption lines arising from Mn.sup.2+ are calculated from the applied microwave frequency, the nuclear spin quantum numbers m.sub.Ii and m.sub.Ij producing the two absorption lines, a predetermined g value g.sub.o intrinsic to Mn.sup.2+, and a predetermined isotropic hyperfine coupling constant A. The magnetic field strength H.sub.cx at a position of interest in the ESR spectrum is determined from the distance between the absorption lines, the distance between the position and one of the two absorption lines, and the magnetic field strengths H.sub.ci, H.sub.cj.

REFERENCES:
patent: 3348136 (1967-10-01), Nelson et al.
patent: 3371271 (1968-02-01), Takeuchi et al.
patent: 4376264 (1983-03-01), Dokter et al.
King et al., "The Application of the Zeeman Effect . . . Measurement of Pulsed Magnetic Fields", Proceedings of the Royal Society of London, A, 323, 431-442, 1971.

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