Fast proton hopping detection in ice Ih by quasi-elastic neutron scattering

Itay Presiado; Jyotsana Lal; Eugene Mamontov; Alexander I. Kolesnikov; Dan Huppert

doi:10.1021/jp2008094

Fast proton hopping detection in ice I_h by quasi-elastic neutron scattering

Itay Presiado, Jyotsana Lal, Eugene Mamontov, Alexander I. Kolesnikov, Dan Huppert

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Abstract

Quasi-elastic neutron scattering was employed on samples of HCldoped polycrystalline ice Ih. The analysis of the scattering signal provides the excess proton hopping time, t_hop, in the temperature range of 140-195 K. The hopping time strongly depends on the temperature of the sample, and the activation energy of a hopping step is 17 kJ/mol. The values of thop of the current experiment are in good agreement with calculated values derived from previous photochemical experiments,1 in which we found that the proton hopping time at T > 242 K is on the order of 200 fs, roughly 10 times shorter than in liquid water at room temperature.

Original language	English
Pages (from-to)	10245-10251
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	115
Issue number	20
DOIs	https://doi.org/10.1021/jp2008094
State	Published - May 26 2011

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title = "Fast proton hopping detection in ice Ih by quasi-elastic neutron scattering",

abstract = "Quasi-elastic neutron scattering was employed on samples of HCldoped polycrystalline ice Ih. The analysis of the scattering signal provides the excess proton hopping time, thop, in the temperature range of 140-195 K. The hopping time strongly depends on the temperature of the sample, and the activation energy of a hopping step is 17 kJ/mol. The values of thop of the current experiment are in good agreement with calculated values derived from previous photochemical experiments,1 in which we found that the proton hopping time at T > 242 K is on the order of 200 fs, roughly 10 times shorter than in liquid water at room temperature.",

author = "Itay Presiado and Jyotsana Lal and Eugene Mamontov and Kolesnikov, {Alexander I.} and Dan Huppert",

year = "2011",

month = may,

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doi = "10.1021/jp2008094",

language = "English",

volume = "115",

pages = "10245--10251",

journal = "Journal of Physical Chemistry C",

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T1 - Fast proton hopping detection in ice Ih by quasi-elastic neutron scattering

AU - Presiado, Itay

AU - Lal, Jyotsana

AU - Mamontov, Eugene

AU - Kolesnikov, Alexander I.

AU - Huppert, Dan

PY - 2011/5/26

Y1 - 2011/5/26

N2 - Quasi-elastic neutron scattering was employed on samples of HCldoped polycrystalline ice Ih. The analysis of the scattering signal provides the excess proton hopping time, thop, in the temperature range of 140-195 K. The hopping time strongly depends on the temperature of the sample, and the activation energy of a hopping step is 17 kJ/mol. The values of thop of the current experiment are in good agreement with calculated values derived from previous photochemical experiments,1 in which we found that the proton hopping time at T > 242 K is on the order of 200 fs, roughly 10 times shorter than in liquid water at room temperature.

AB - Quasi-elastic neutron scattering was employed on samples of HCldoped polycrystalline ice Ih. The analysis of the scattering signal provides the excess proton hopping time, thop, in the temperature range of 140-195 K. The hopping time strongly depends on the temperature of the sample, and the activation energy of a hopping step is 17 kJ/mol. The values of thop of the current experiment are in good agreement with calculated values derived from previous photochemical experiments,1 in which we found that the proton hopping time at T > 242 K is on the order of 200 fs, roughly 10 times shorter than in liquid water at room temperature.

UR - http://www.scopus.com/inward/record.url?scp=79959952360&partnerID=8YFLogxK

U2 - 10.1021/jp2008094

DO - 10.1021/jp2008094

M3 - Article

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SN - 1932-7447

VL - 115

SP - 10245

EP - 10251

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 20

ER -

Fast proton hopping detection in ice I_h by quasi-elastic neutron scattering

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