Surface Temperature Dependence of Hydrogen Ortho-Para Conversion on Amorphous Solid Water


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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/62697

Title:	Surface Temperature Dependence of Hydrogen Ortho-Para Conversion on Amorphous Solid Water
Authors:	Ueta, Hirokazu Browse this author
	Watanabe, Naoki Browse this author →KAKEN DB
	Hama, Tetsuya Browse this author
	Kouchi, Akira Browse this author
Issue Date:	23-Jun-2016
Publisher:	American Physical Society (APS)
Journal Title:	Physical Review Letters
Volume:	116
Issue:	25
Start Page:	253201
Publisher DOI:	10.1103/PhysRevLett.116.253201
PMID:	27391719
Abstract:	The surface temperature dependence of the ortho-to-para conversion of H-2 on amorphous solid water is first reported. A combination of photostimulated desorption and resonance-enhanced multiphoton ionization techniques allowed us to sensitively probe the conversion on the surface of amorphous solid water at temperatures of 9.2-16 K. Within a narrow temperature window of 8 K, the conversion time steeply varied from similar to 4.1 x 10(3) to similar to 6.4 x 10(2) s. The observed temperature dependence is discussed in the context of previously suggested models and the energy dissipation process. The two-phonon process most likely dominates the conversion rate at low temperatures.
Rights:	©2016 American Physical Society
Type:	article
URI:	http://hdl.handle.net/2115/62697
Appears in Collections:	低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 渡部直樹

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