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  • Title: Multifrequency electron paramagnetic resonance of irradiated L-alanine.
    Author: Ghim BT, Du JL, Pfenninger S, Rinard GA, Quine RW, Eaton SS, Eaton GR.
    Journal: Appl Radiat Isot; 1996; 47(11-12):1235-9. PubMed ID: 9022182.
    Abstract:
    The radical generated by gamma-irradiation of crystalline L-alanine was examined by continuous wave (CW) and pulsed electron paramagnetic resonance (EPR) at 1.8, 3.2, 4.9, 9.1 and 19.4 GHz. The spin-flip satellite lines that make a prominent contribution to the saturated spectra at 9.1 GHz are less conspicuous at lower frequencies because of overlap with the allowed transitions. The spin-lattice relaxation times measured by long-pulse saturation recovery and phase memory times measured by electron spin echo increase with increasing microwave frequency.
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