کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1192728 | 1492287 | 2013 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Strong-field ionization of small niobium and tantalum clusters Strong-field ionization of small niobium and tantalum clusters](/preview/png/1192728.png)
Strong-field ionization and concomitant Coulomb explosion studies are performed on small (<30 atoms) homogeneous transition metal clusters composed of niobium or tantalum. Enhanced ionization of the clusters results in the formation of charge states reaching M11+ [M = Nb, Ta] under irradiation with 100 fs pulses of 624 nm light at intensities of approximately 1 PW/cm2. The same maximum charge states were created upon expansion of the pulse width to 350 fs with consistent pulse energy. These results are compared to previous studies involving metal oxide and carbide clusters of similar size, yielding identical ion states. This suggests that the enhanced ionization behavior of metal-containing clusters is driven by the delocalized electrons on the metal species.
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► Strong-field ionization of small homogeneous metal explored.
► Ionization enhancement behavior found to be similar to oxides/carbides.
► Pulsewidth studies showed different cluster expansion times.
Journal: International Journal of Mass Spectrometry - Volume 333, 1 January 2013, Pages 55–58