Rayleigh Instabilities in Multiply Charged Sodium Clusters

Le résumé fourni par la source

The stability of multiply charged sodium clusters ${\mathrm{Na}}_{n}^{q+}$ $(q\ensuremath{\le}10)$ produced in collisions between neutral clusters and multiply charged ions ${A}^{z+}$ ( $z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$ to 28) is experimentally investigated. Multiply charged clusters are formed within a large range of temperatures and fissilities. They are identified by means of a high-resolution reflectron-type time-of-flight mass spectrometer $(m/\ensuremath{\delta}m\ensuremath{\approx}14000)$. The maximum fissility of stable clusters is obtained for $z\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}28$ and is $X\ensuremath{\approx}0.85\ifmmode\pm\else\textpm\fi{}0.07$, slightly below the Rayleigh limit $(X\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1)$. It is mainly limited by the initial cluster temperature $(T\ensuremath{\approx}100\mathrm{K})$.

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