CHOOSING REFERENCE SAMPLES FOR EPR CONCENTRATION MEASUREMENTS .2. SYSTEMS OF S=1

The papers of this series provide tabulated values that characterize t he specific intensity of EPR signals (signal area per paramagnetic cen ter) for a wide range of paramagnetic species of various classes. Thes e data enable one to choose a reference material producing an EPR sign al close in specific intensity to the signal of the species to be quan titated in the unknown or to determine a correction factor when the sp ecific intensities of the two signals are substantially different. The tabulated values comprise transition probabilities and the derivative s of the resonance fields with respect to the frequency obtained by ex act diagonalization of spin Hamiltonian matrices; they can be used in field-swept X-band EPR quantitations of solids. This part covers the S =1 paramagnetic centers in cubic, axial, and orthorhombic crystal fiel ds.