کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1523833 | 995331 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The fundamental determining factor of angular emission of multiple charged ions ejected by laser ablation of different metals and their binary alloys The fundamental determining factor of angular emission of multiple charged ions ejected by laser ablation of different metals and their binary alloys](/preview/png/1523833.png)
Ions up to ionization state q = 4, emitted from laser produced plasma of Al, Ti, Ti50Al50 and Ti75Al25 targets ablated by Srivastava et al. (2006), are distributed angularly in the form of a cone, and for each ionization state the angular distribution has been shown to follow the cosine power-law: F = Focosnθ. It is found that the value of exponent n of cosnθ distribution function increases with the increase in ionization state. For each target, the value of exponent n of individual ionization states as well as total charge exhibits an excellent linear correlation with the room temperature Debye–Waller thermal parameter B or the mean-square amplitude of the atomic vibrations
► Both cosine power-law and Gaussian function can be employed to describe the angular distribution of LPP ions.
► Laser ablation parameters have the best correlation with the room temperature Debye–Waller thermal parameter B.
► Crystalline materials, whether metals or alloys, possess lattice-vibration memory in the plasma state.
Journal: Materials Chemistry and Physics - Volume 137, Issue 1, 15 November 2012, Pages 147–153