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Core structure of latent heavy‐ion tracks in {100} LiF derived by small‐angle X‐ray scattering
Author(s) -
Abu Saleh Sameer,
Eyal Yehuda
Publication year - 2007
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889807000064
Subject(s) - ion , scattering , atomic physics , projectile , excitation , fluorine , irradiation , electron density , core (optical fiber) , lattice (music) , chemistry , x ray , electron , materials science , nuclear physics , optics , physics , organic chemistry , quantum mechanics , acoustics , metallurgy , composite material
Radial electron densities within 27–111 µm‐long ion damage trails, `latent ion tracks', created in {100} LiF by irradiation with GeV Pb and U projectiles, have been derived by means of small‐angle X‐ray scattering. The tracks exhibit continuous electron density decreases of 49–74% along the centers of their 2.3–3.4 nm‐diameter cores. Structural alteration under the intense ion‐deposited electronic excitation has been attributed to two successive processes: ( a ) local breakdown of the LiF lattice into fluorine molecules and Li atoms, and ( b ) release of the fluorine gas and of at least a portion of the voluminous Li atoms through the low‐density tracks.