Electronic Spectroscopy EPR/ESR. Powerpoint Templates. μ = g S Landé factor. E = - μ . B 0. Electron Spins in B 0. Δ E = g B 0 h/2 π. When phase-sensitive detection is used, the signal is the first derivative of the absorption intensity. CH 3. H 2 COCH 3. - PowerPoint PPT Presentation