Let $a$,$b$ be two unlike spins in a uniform magnetic field and RF excitation, and let $B_0$ be the magnetic field for which some transition energies of the spins coincide $E_a^{i,j}(B_0)=E_b^{k,l}(B_0)$. This is the classic condition for spin flip-flop due to dipolar interaction. Now we move away to $B=B_0+\delta$, and for the flip-flop to occur, an RF excitation of frequency $f/h=E_a^{i,j}(B)-E_b^{k,l}(B)$ is required. In an ESR/NMR B-f scan it should appear as an additional line. It all looks like something that should be covered by theory in the 40s, and experimentally proven in the 50s, yet I see no sign of that. For like spins it is indeed covered by double Larmor line literature. What buzzword am I missing in my literature review?


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.