November 11, 2019 - Knowing the actual sample temperature in a solid-state NMR experiment is crucial in many ways. Many different approaches exist from measuring the chemical shift difference in spectra of ethylene glycol (solution-state NMR spectroscopy) to measuring the peak position in lead nitrate or the T1 relaxation times of KBr (solid-state NMR spectroscopy).
September 24, 2014 - This is not an article about DNP-NMR spectroscopy, however, it deals with the measurements of temperatures in solid-state NMR experiments using KBR and referencing its chemical shift to 13C of adamantane in unstable magnetic fields.
June 6, 2014 - This article is not exclusively about DNP-NMR spectroscopy, but describes an interesting approach of measuring cryogenic temperatures using a simple fiber optic-based setup.