Determination of the spin Hamiltonian constants for electron spin resonance at energy level crossing points

The crossing point of the Cr⁺³ ion energy-levels in single-crystal K₃Co(CN)₆, with the applied magnetic field parallel to the y-axis, is determined experimentally. Precisely calculated values of the constants E and D of the EPR spin Hamiltonian are shown to agree closely with those obtained by other authors.In conclusion, I wish to thank Professor V. S. Grechishkin for supervising my work and discussing the results.