EPR‐spectrum of irradiated potassium dichromate single crystals

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Abstract
EPR‐spectra of X‐irradiated potassium dichromate crystals are studied at various temperatures from RT to LNT. The most intensive lines are interpreted as due to radicals CrO43− (A‐lines) and CrO3− (C‐lines), resulting from Cr2O7 owing to X‐irradiation. Hyperfine structure of C‐line, due to interaction of unpaired electron with Cr53 nucleus, occurs at low temperatures, and new unobserved earlier Q‐lines appear near‐by C‐line. The spectrum may be described by usual spin Hamiltonian for S = 1/2 with following parameters: for A‐line gz = 1.9841, gy = 1.9685, gx = 1.9592; for C‐line gz = 1.9148, gy = 1.9671, gx = 1.9886, |Az| = 30.53 · 10−4 cm−1, |Ax| = 10.62 · 10−4 cm−1, |Ay| = 6.62 · 10−4 cm−1.