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Figure 12
ESR spectrum of an aqueous spin-trap solution after X-irradiation in the presence (+) and absence (−) of DMPC. Hyperfine-splitting constants are 15.2 G and 16.0 G, respectively. The total dose in each case was 15 Mrad (61% absorption assumed) and exposures were made at a dose rate of 14 krad s−1. Radicals observed are stable for at least a week at 277 K. The ESR spectra were obtained at room temperature with the following ESR spectrometer settings: microwave power, 20 mW; field, 3465 ± 50 G; conversion, 163.84 ms; time constant, 655 ms; sweep time, 167.772 s; modulation frequency, 100.000 kHz; modulation amplitude, 1.013 G; receiver gain, 5 × 105; number of scans, 1. Samples were irradiated with a flux of 2 × 1010 photons s−1 on the A1 beamline at CHESS. Taken from Fig. 2 of Cheng & Caffrey (1996BB2).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 9| Part 6| November 2002| Pages 333-341
doi:10.1107/S0909049502014528
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