Surface recombination in spin-polarized hydrogen: Where does the heat go?

The recombination of two hydrogen atoms to the molecular state is the most energetic chemical reaction per unit mass known. The heat released from such recombination has so far made it impossible to cool a gas of spin-polarized hydrogen (H↓) into the regime of quantum degeneracy. To better understan...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1994-02, Vol.194, p.917-918
Main Authors: Zhao, Zuyu, Meyer, Eric S., Freedman, Barry, Kim, Jinha, Mester, John C., Silvera, Isaac F.
Format: Article
Language:English
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Summary:The recombination of two hydrogen atoms to the molecular state is the most energetic chemical reaction per unit mass known. The heat released from such recombination has so far made it impossible to cool a gas of spin-polarized hydrogen (H↓) into the regime of quantum degeneracy. To better understand this problem, we have studied 2nd-order surface recombination in an absorbed gas of H↓ from the standpoint of heat distribution. We have measured an upper bound on the fraction F of the total recombination energy which is deposited locally on the surface at the point of recombination.
ISSN:0921-4526
DOI:10.1016/0921-4526(94)90788-9