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Mobility and Free Radical Concentration Effects in Proton–Electron Double-Resonance Imaging

✍ Scribed by Paulo L. de Sousa; Ricardo E. de Souza; Mario Engelsberg; Luiz A. Colnago

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
176 KB
Volume
135
Category
Article
ISSN
1090-7807

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✦ Synopsis

The dependence of the enhancement of proton-electron double-resonance images upon the mobility of the proton bearing molecules, of the concentration of free radicals, and of the pulsed saturating RF power is studied in a magnetic field of 16 mT. The data exhibit a behavior which, in the potentially interesting region of small free radical concentration, may differ substantially from the high-concentration regime depending upon experimental conditions. The results permit a clearer understanding of the factors determining enhancement and contrast in images obtained by dynamic nuclear polarization.

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