期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.175503
关键词
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资金
- ARC
- ASRP
- Academy of Finland
- CSC
- NSF/DoE [CHE0087817]
- Illinois Board of Higher Education
- U. S. DOE, Basic Energy Sciences, Office of Science, [W-31-109-Eng-38]
We report on the observation of a fine structure in ion tracks in amorphous SiO2 using small angle x-ray scattering measurements. Tracks were generated by high energy ion irradiation with Au and Xe between 27 MeV and 1.43 GeV. In agreement with molecular dynamics simulations, the tracks consist of a core characterized by a significant density deficit compared to unirradiated material, surrounded by a high density shell. The structure is consistent with a frozen-in pressure wave originating from the center of the ion track as a result of a thermal spike.
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