Particle emission induced by ionization tracks in water ice

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• 作者：Baragiola ; R.A. ; Shi ; M. ; Grosjean ; D.E. ; Schou ; J.
• 刊名：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
• 出版年：1995
• 出版时间：May, 1995
• 年：1995
• 卷：96
• 期：3-4
• 页码：524-529
• 全文大小：514 K

文摘

We study electron emission and sputtering during irradiation of amorphous water ice at 60 K by H⁺, D⁺, He⁺, Li⁺, Be⁺, B⁺, C⁺, N⁺, O⁺, F⁺, and Ne⁺ ions in the energy range from 10 to 100 keV. We find that for constant velocity (5 keV/amu) ions the dependence of the sputtering yields with projectile atomic number Z is proportional to the square of the Z-dependence of the electronic stopping power dE/dx, using dE/dx values predicted by Yarlagadda, Robinson, and Brandt. The electron yields increase sublinearly with dE/dx, indicating the strong influence of un-neutralized holes in the ionization track produced by the projectiles.