Wall relaxation of super(3)He in spin-exchange cells

Evidence is given that magnetic sites, showing remanence and hysteresis, significantly affect wall relaxation in spin-exchange cells. It is demonstrated that large reversible changes in T super(-) sub(1) super(1), and hence in the corresponding surface relaxation sites, are induced in such cells mai...

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Bibliographic Details
Published in:Physical review letters 2001-10, Vol.87 (14), p.143004/1-143004/4
Main Authors: Jacob, R E, Morgan, S W, Saam, B, Leawoods, J C
Format: Article
Language:English
Subjects:
Helium
Hysteresis
Magnetic field effects
Magnetic resonance imaging
Optical pumping
Polarization
Thermal effects
Online Access:Get full text
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Summary:Evidence is given that magnetic sites, showing remanence and hysteresis, significantly affect wall relaxation in spin-exchange cells. It is demonstrated that large reversible changes in T super(-) sub(1) super(1), and hence in the corresponding surface relaxation sites, are induced in such cells mainly by exposing them to a large (10 KG) magnetic field. This effect is correlated with the presence of Rb in these cells.
ISSN:0031-9007