Table 1.
Free parameters intra-cluster T1, R1, κ, and P0 used in fitting the models described in the text to the experimental data of Fig. 2. Also included is the intrinsic sample temperature T, derived from P0 using Eq. 3. Best-fit values for the three boundary conditions are listed in columns 2–4, along with the corresponding errors estimated from the fits.
| Best-fit parameters from DNP data: | Model | ||
|---|---|---|---|
| Simplest* | Bottleneck* | Ab initio | |
| Boundary Condition | |||
| Eq. (9) | Eq. (10) | Eqs. (6), (8) | |
| T1, relaxation time (min) | 207 ± 39 | 145 ± 25 | 167 ± 12 |
| R1, cluster radius (μm) | 34 ± 2 | 1.05 ± 0.1 | 1.21 ± 0.04 |
| κ, bottleneck const. (μm−1) | ∞ | 0.2 ± 0.18 | N/A |
| P0, thermal polarization (%) | 0.073 ± 0.005 | 0.069 ± 0.0044 | 0.069 ± 0.003 |
| T, sample temperature (K) | 1.93 ± 0.14 | 2.03 ± 0.13 | 2.04 ± 0.09 |
*
Listed with permission from Ref. [13].