First measurement of the hydrogen spin-exchange collision cross-section in the low temperature region

Baumgarten, C.; Braun, B.; Capiluppi, M.; Ciullo, G.; Dalpiaz, P. F.; Kolster, H.; Lenisa, P.; Marukyan, H.; Nass, A.; Reggiani, D.; Stancari, M.; Steffens, E.
December 2008
European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Dec2008, Vol. 48 Issue 3, p343
Academic Journal
The spin-exchange collision cross-section for hydrogen atoms has been measured for the first time in the low temperature range 40–100 K by using the polarized hydrogen gas target of the HERMES experiment at DESY (Hamburg, Germany). The results agree with a previous measurement in the overlapping temperature region 80–100 K, while seem to hint an increasing behaviour with temperature in the region 50–80 K.


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