DNP measurements of irradiated deuterated polyethylene

Abstract

Deuterated polyethylene samples have been prepared as polarizable target material. The paramagnetic centers necessary for the dynamic nuclear polarization process have been created by irradiation with electrons. The paramagnetic resonance from the induced centers into the samples has been studied in a conventional X-band EPR spectrometer operating at 9.35 GHz and at liquid nitrogen temperature. In a fully deuterated polyethylene sample more than 30% deuteron polarization has been achieved at dilution refrigerator temperature and 2.5 T.

Polarized target material developments at Bonn and Bochum

“…Details of the ongoing research in this field can be found in the corresponding article of these proceedings [39]. The situation for radiation doped deuterated polyethylene is discussed in these proceedings as well [40].…”