Phys. Rev. Lett. 59, 672–675 (1987)Magnetic trapping of spin-polarized atomic hydrogenReceived 6 May 1987; published in the issue dated 10 August 1987 We have confined over 5×1012 atoms of hydrogen in a static magnetic trap. The atoms are loaded into the trap by precooling with a dilution refrigerator. At operating densities near 1×1013 cm-3 the gas is observed to be electron and nuclear polarized in the uppermost hyperfine state. The long lifetime of the trapped gas (over 20 min) suggests that it is thermally decoupled from the wall and has evaporatively cooled to a temperature of about 40 mK. The residual decay of the gas density is consistent with spin relaxation induced by dipolar interactions between atoms. © 1987 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.59.672
DOI:
10.1103/PhysRevLett.59.672
PACS:
67.65.+z, 32.80.Pj, 76.90.+d
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