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SUMMARY:Nuclear Spins far from Equilibrium
DTSTART:20170323T160000
DTEND:20170323T170000
DTSTAMP:20260407T025813Z
UID:94ed4dc0ffc630576fe128dbcd3743161787ef5d992c4c9bdade6ef4
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Malcolm H. Levitt\nUniversity of Southampton\nUnited Kin
 gdom\nThere are hundreds of nuclear magnetic resonance (NMR) methods appli
 ed today\, ranging from methods for the imaging of anatomic structure (MRI
 ) to methods for determining molecular structure and dynamics in solution 
 and in the solid state. However most of these techniques employ nuclear sp
 in systems which remain very close to a state of thermal equilibrium with 
 respect to the molecular environment. \n\nIt is now possible to prepare s
 ubstances in which the nuclear spin systems are very far from thermal equi
 librium. Such systems may\, in some cases\, give rise to NMR signals which
  are highly enhanced with respect to signals obtained under routine condit
 ions. The enhancement factor may be as large as 10^5\, facilitating entire
 ly new classes of NMR applications such as the imaging of metabolism in vi
 vo. There are also modes of non-equilibrium nuclear spin order which are n
 on-magnetic and do not give rise to NMR signals\, but which are relatively
  long-lived\, allowing the non-equilibrium state to be maintained for a re
 latively long time. Methods exist for extracting hyperpolarized spin order
  from such non-magnetic non-equilibrium states\, on demand. In some cases\
 , highly non-equilibrium nuclear spin order gives rise to non-magnetic eff
 ects\, such as a change in the dielectric constant of the material. \n\nI
  will review the types of non-equilibrium spin order that exist\, describe
  how they are prepared\, how they may be interconverted\, and how they may
  be applied. 
LOCATION:BCH 2201 https://plan.epfl.ch/?room==BCH%202201
STATUS:CANCELLED
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