Time-dependent small-angle polarised neutron scattering from domains of polarised protons has been observed at the onset of dynamic nuclear polarisation in a frozen solution of 98% deuterated glycerol-water at 1 K containing a small concentration of paramagnetic centres (EHBA-Cr V ). Simultaneous NMR measurements show that the observed scattering arises from protons around the Cr V -ions which are polarised to ∼ 10% in a few seconds, much faster than the protons in the bulk.
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Brandt et al. (2002) studied this question.
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