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Default Hyperpolarized cesium ions doped in a glass material

From The DNP-NMR Blog:

Hyperpolarized cesium ions doped in a glass material


Ishikawa, K., Hyperpolarized cesium ions doped in a glass material. J Magn Reson, 2014. 249C(0): p. 94-99.


http://www.ncbi.nlm.nih.gov/pubmed/25462952


Hyperpolarized (HP) 133Cs nuclear magnetic resonance signals were measured from borosilicate glass cell walls during optical pumping of cesium vapor at high magnetic field (9.4T). Significant signal enhancements were observed when additional heating of the cell wall was provided by intense but non-resonant laser irradiation, with integrated HP 133Cs NMR signals and line widths varying as a function of heating laser power (and hence glass temperature). Given that virtually no Cs ions would originally be present in the glass, absorbed HP Cs atoms rarely met thermally-polarized Cs ions already at the surface; thus, spin-exchange via nuclear dipole interaction cannot be the primary mechanism for injecting spin polarization into the glass. Instead, it is concluded that the absorption and transport of HP atoms into the glass material itself is the dominant mechanism of nuclear spin injection at high temperatures-the first reported experimental demonstration of such a mechanism.


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