High-energy ion impacts into the sulfur-bearing ice surface of Europa: an atomistic study of chemical transformations
High-energy ion impacts into the sulfur-bearing ice surface of Europa: an atomistic study of chemical transformations
复制标题
高能离子撞击木卫二含硫冰面:化学转化的原子研究
DOI:
10.1051/0004-6361/201935367
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发表时间:
2019
影响因子:
6.5
通讯作者:
H. M. Urbassek
中科院分区:
文献类型:
--
作者:
C. Anders;H. M. Urbassek
ContextThe ice surface of Europa is unique due to its high concentration of sulfur compounds such as SO4, SO2, and H2S. Energetic ion impacts originating from the magnetosphere of Jupiter may alter the composition of the ice surface.AimsWe explore the chemical alteration of the surface due to a 20 MeV sulfur ion impact, for which the most pronounced effects are expected, and monitor the chemical transformations occurring inside the ice.MethodsMolecular dynamics simulations are used based on a reactive (REAX) potential, which allows for the molecular breakups and the ensuing reactions to be followed on an atomistic scale.ResultsWe observe dissociation of SO4and also a loss of SO2, while SO3is created; this is in qualitative agreement with laboratory experiments. Hydrolysis of water leads to abundant formation of H+, H3O+and OH−; in addition, we predict the presence of both sulfurous acid, H2SO3, and sulfuric acid, H2SO4, as well as traces of carbonic acid, H2CO3. The irradiation produces H2and O2, which are free to escape from the surface, in agreement with the tenuous Europa atmosphere detected.ConclusionsSince magnetospheric sulfur ions have a high mass and may possess large energies, they provide a unique source of high energy deposition in the ice surface of Europa leading to abundant radiolysis fragments and products. In addition, sulfur compounds existing in the ice are chemically transformed, for example, by sulfite formation.
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影响因子:
3.2
作者:
C. Anders;H. M. Urbassek
通讯作者:
H. M. Urbassek
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
H. Rothard;A. Domaracka;P. Boduch;M. Palumbo;G. Strazzulla;E. F. da Silveira;E. Dartois
通讯作者:
E. Dartois
影响因子:
10.3
作者:
S. Bolton;J. Lunine;D. Stevenson;J. Connerney;Steve Levin;Tobias Owen;F. Bagenal;Daniel Gautier;A. Ingersoll;Glenn S Orton;T. Guillot;W. Hubbard;J. Bloxham;A. Coradini;S. K. Stephens;P. Mokashi;R. Thorne;Rob Thorpe
通讯作者:
S. Bolton;J. Lunine;D. Stevenson;J. Connerney;Steve Levin;Tobias Owen;F. Bagenal;Daniel Gautier;A. Ingersoll;Glenn S Orton;T. Guillot;W. Hubbard;J. Bloxham;A. Coradini;S. K. Stephens;P. Mokashi;R. Thorne;Rob Thorpe
影响因子:
3.7
作者:
J. Kohanoff;E. Artacho
通讯作者:
E. Artacho
影响因子:
4.8
作者:
C. Anders;H. M. Urbassek
通讯作者:
H. M. Urbassek