Articles you may be interested inPhotoelectron spectroscopy of aqueous solutions: Streaming potentials of NaX (X = Cl, Br, and I) solutions and electron binding energies of liquid water and X− Photoelectron spectroscopy of iodine anion solvated in water clusters J. Chem. Phys. 95, 9416 (1991);

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Articles you may be interested inProduction of multiply-charged metal-cluster anions in Penning and radio-frequency traps AIP Conf. Proc. 1521, 230 (2013); 10.1063/1.4796079 Cryogenic linear Paul trap for cold highly charged ion experiments Rev. Sci. Instrum. 83, 083115 (2012); 10.1063/1.4742770Collisional effects on the radio-frequency sheath dynamics This paper presents techniques to store, manipulate, and detect cluster ions in an rf Paul trap as an approach to study the physics and chemical physics of clusters. The trap has been designed to be the primary experimental environment in the sense that experimental manipulation and ion detection are performed in situ within the trap. Specific design considerations for the trap and rf electronics relevant to metal cluster experiments are discussed. We present the application of these techniques to measurements of trapped ciJo in order to estimate their limitations for studying metal cluster ions. This paper demonstrates the capability to nondestructively detect small variations in the number of trapped ciJo ions with an ion noise level of = 100 ions limited by thermal current fluctuations. Trapped ion lifetimes of 7Ion>30 min are measured following the relaxation of ciJo translational energy to =300 K. Measurements of the collisional dissociation of trapped cto ions at rates < 100 S-I by He at ~1O-6 Torr have been performed and the products detected in situ by the mass distribution of the C; products. Several possibilities for metal cluster experiments in rf Paul traps are discussed. 6666 Parks, Pollack, and Hill: Cluster experiments in rf Paul traps the axial z direction and the radial r direction having frequencies W z and W r , respectively, and of a "micromotion I2 " at the rf frequency, n. In particular, for qz' az~ 1, the ion J.

Photodepletion spectroscopy was used to obtain electronic absorption data for Na5, Na6, and Na7 in a wavelength range from 420–770 nm. Measurements were rationalized using several models, ranging from classical electrostatic to ab initio large-scale configuration-interaction calculations. As in previous studies of Na4, Na8, and Na20, classical Mie–Drude theory applied to appropriately dimensioned metal droplets describes the gross but not a number of fine-structure features of the spectra observed. In contrast, ab initio large-scale configuration-interaction predictions of vertical electronic excitations from specific ground-state geometries can more fully account for the measurements. Theory–experiment comparison suggests that Na6 is predominantly formed under our molecular-beam conditions in a planar or near-planar structure. In contrast, the spectrum obtained for Na7 is consistent with a three-dimensional topology.

We have measured the photoelectron-spectra of I" (H20)n clusters in the size range n=l-60. We have found that the first six water molecules form a sotvation layer with an average 0.35 eV electrostatic stabilization of the anion. At larger cluster sizes the electrostatic stabilization of water does not fit a continuous dielectric solvent. The most stable structures of the clusters consist of internally solvated anions. In the size range n=34-40 we have found evidence for existence of cluster structures with surface solvated anions.