Figure 5.

DNP field profile of the ¹H polarization build-up rate in a naphthalene single crystal at T = 25 K measured by NMR with a 10 G (∼28 MHz) field sweep (the sweep center is plotted as the horizontal axis) with $\dot{\omega }$ = 1 G/μs (2.8 MHz/μs). This experimental data are compared to the analytical calculation using eq 8 represented as the solid line.