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(CsI)ₙ clusters are generated by inert-gas condensation and analyzed by time-of-flight mass spectrometry. The stability of cube-shaped nonstoichiometric (Csₙ{I}_{n{{-}}1})ᵗ, ions as observed before in secondary-ion mass spectrometry, is confirmed for n=14 and 23 at ionization energies beyond 15 eV. With lowered electron energy, the spectra show enhanced intensities for n=7, 10, 13, 17, 19, and 25 that arise neither from neutral nor from charged compact cube-shaped CsI clusters.
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Pflaum et al. (1986) studied this question.
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