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Sol-gel coated glass cells for spin-exchange polarized 3 Ming F. Hsu, G. D. Cates,a)
 

Summary: Sol-gel coated glass cells for spin-exchange polarized 3
He
Ming F. Hsu, G. D. Cates,a)
and I. Kominis
Department of Physics, Princeton University, Princeton, New Jersey 08544
I. A. Aksay and D. M. Dabbs
Department of Chemical Engineering and Princeton Materials Institute, Princeton University, Princeton,
New Jersey 08544
Received 20 April 2000; accepted for publication 28 July 2000
We have developed a high-purity sol-gel coating for the interior surface of glass cells used for
polarizing 3
He by spin-exchange optical pumping. The coating is designed to minimize spin
relaxation due to wall collisions. A longitudinal spin-relaxation time T1 in a sol-gel coated Pyrex
cell of 344 8 h was achieved, the longest T1 we have ever recorded for a gaseous sample. Repeated
trials indicated that the coating was quite robust. Results using an uncoated Pyrex cell were also
quite good, although inferior to the performance of the coated cell. 2000 American Institute of
Physics. S0003-6951 00 02839-4
Noble gases whose nuclei have been polarized by spin
exchange with laser-optically pumped alkali-metal vapors
have been increasingly employed in fields ranging from

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science