The influence of energy density inside the nuclear track on the secondary-ion emission

Secondary ion emission yields from polycrystalline LiF and deuterated amorphous carbon a-C:D, bombarded by isotachic projectiles at 1.4 MeV/u, were studied as a function of the projectile atomic number (C, N, Ar, Kr, Sn) and consequently, as a function of the electronic stopping power. The emitted,...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2003-08, Vol.209, p.62-67
Main Authors: Neugebauer, R., Jalowy, T., Pereira, J.A.M., da Silveira, E.F., Rothard, H., Toulemonde, M., Groeneveld, K.O.
Format: Article
Language:English
Subjects:
Ion–solid interaction
Secondary ion desorption
Secondary ion mass spectrometry
Time of flight technique
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Summary:Secondary ion emission yields from polycrystalline LiF and deuterated amorphous carbon a-C:D, bombarded by isotachic projectiles at 1.4 MeV/u, were studied as a function of the projectile atomic number (C, N, Ar, Kr, Sn) and consequently, as a function of the electronic stopping power. The emitted, positively charged secondary ions were analysed by a time of flight mass spectrometer. The H + ions originate on the top surface near the track core, while heavier secondary ions (e.g. hydrocarbons) originate from the region of the track halo. Emission of Li + from LiF was observed for all projectiles. On the other hand, only Sn projectiles were able to produce D + emission from a-C:D. The results are discussed considering the deposited energy density.
ISSN:0168-583X
1872-9584
DOI:10.1016/S0168-583X(02)01970-5