spin-polarized atomic hydrogen

spin-polarized atomic hydrogen

[′spin ¦pō·lə‚rīzd ə′täm·ik ′hī·drə·jən]
(physical chemistry)
A system of hydrogen atoms cooled to a very low temperature in a very high magnetic field so that electron spins in almost all the atoms are antiparallel to the magnetic field, with the result that the atoms interact only through the weak triplet-state interaction so that no hydrogen molecules are formed.