Comparing low-field cryogenic nuclear relaxation of hyperpolarized diamond and silicon particles.

ABSTRACT: We report on field cycling experiments with hyperpolarized diamond and silicon particles between 10 mT and 3.4 T at temperatures below 10 K. Diamonds with approximately 54 ppm defects, of which around 58% were P1 centers, were hyperpolarized by continuous-wave dynamic nuclear polarization (DNP) at 3.4 T. For fields above 200 mT, the ¹³C relaxation in diamond was measured to be nearly independent of the magnetic field. At around 200 mT, the field dependence changed and [Formula: see text] was approximately proportional to the field strength. For example, the relaxation time decreased approximately threefold by reducing the main magnetic field from 200 mT to 75 mT. The ¹³C relaxation was measured to be independent of the DNP polarization time and nuclear hyperpolarizati

SUBMITTER: von Witte G 

PROVIDER: S-EPMC12830836 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature