Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1523833 | Materials Chemistry and Physics | 2012 | 7 Pages |
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.