Hydrogen atoms trapped in acid ices at very low temperatures |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095-1592, USA;2. Department of Electrical and Computer Engineering, University of California, Los Angeles, CA 90095-1592, USA;3. Department of Chemical Engineering, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait;4. Department of Electrical Engineering, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait;1. Department of Physiology, University of Toronto, Toronto, Ontario M5G 1A8, Canada;2. Departments of Physiology, Medicine and OB/GYN, University of Toronto, Toronto, Ontario M5G 1A8, Canada;3. Division of Cellular and Molecular Biology, Toronto General Hospital Research Institute, University Health Network, Toronto, Ontario M5S 1A8, Canada;1. Section of Clinical Oral Physiology, Department of Dentistry, Faculty of Health, Aarhus University, Vennelyst Boulevard 9, 8000 Aarhus C, Denmark;2. Scandinavian Center for Orofacial Neurosciences (SCON), Aarhus University, Karolinska Institutet and Malmo University;1. International Center for Maternal and Newborn Health, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA;2. Child Health Research Foundation, Dhaka Shishu Hospital, Dhaka, Bangladesh;3. Bangabandhu Shaikh Mujib Medical University, Dhaka, Bangladesh;4. Department of Paediatrics, Hospital for Sick Children and University of Toronto, Toronto, ON, Canada;5. Shishu Sasthya Foundation, Dhaka, Bangladesh;6. Chittagong Ma O'' Shishu Hospital, Chittagong, Bangladesh;7. Institute of Child and Mother Health, Matuail, Dhaka, Bangladesh;8. Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK;9. icddr,b, Dhaka, Bangladesh;10. Saving Newborn Lives, Save the Children Federation, Washington, DC, USA;11. United States Agency for International Development, Washington, DC, USA |
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| Abstract: | ![]()
The ratios of Ht yield at 4 K to that at 77 K were 8.2 and 1.0 for 0.6 M and 6 M H2SO4, respectively, whereas the ratio of the yield for 0.6 M H2SO4 to that for 6 M H2SO4 was 0.15 at 4 K. The effective number of near neighbor protons, neff, and their effective distance, reff, to Ht were obtained: neff = 3.1 and reff = 2.06 for 6 M H2SO4, and neff = 10.1 and reff = 2.46 for 0.6 M H2SO4 at 4 K. The results obtained for 6 M H2SO4 are interpreted in terms of the relaxation of the environment of Ht, whereas the results for 0.6 M H2SO4 imply trapping sites and the trapping mechanism which are different from those for either the glassy or pure ices. |
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