Velocity distribution measurement and two-wire field effects for electric deflection of a neutral supersonic cluster beam

Tikhonov, G.; Wong, Kin; Kasperovich, V.; Kresin, Vladimir Z.

doi:10.1063/1.1447304

Cited by 21 publications

(13 citation statements)

References 13 publications

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“…Further downstream the molecular beam is collimated by two slits (400 mm Â 2 mm), forming a molecular beam with rectangular shape which passes the deflection units (the electrodes and pole faces have the well known shape to produce two-wire field analogues, l 1,E = 150 mm, l 1,B = 80 mm). 63,64 The clusters then pass a drift region (l 2,E = 159.0 cm, l 2,B = 123.3 cm) before entering the time-offlight (TOF) mass spectrometer through a scanning slit (400 mm Â 1.5 cm) which is moved by a step motor to measure the spatial distribution of the molecular beam. The clusters are ionized by a He/F 2 excimer laser (157 nm) approximately 20 cm before the ions are extracted orthogonally by an acceleration unit working in Wiley-McLaren time focus mode.…”

Section: Beam Deflection Experimentsmentioning

confidence: 99%

Atomic domain magnetic nanoalloys: interplay between molecular structure and temperature dependent magnetic and dielectric properties in manganese doped tin clusters

Rohrmann

Schwerdtfeger

2014

Phys. Chem. Chem. Phys.

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We present extensive temperature dependent (16-70 K) magnetic and electric molecular beam deflection measurements on neutral manganese doped tin clusters Mn/SnN (N = 9-18). Cluster geometries are identified by comparison of electric deflection profiles and quantum chemical data obtained from DFT calculations. Most clusters adopt endohedral cage structures and all clusters exhibit non-vanishing magnetic dipole moments. In the high temperature regime all species show exclusively high field seeking magnetic response and the magnetic dipole moments are extracted from the shift of the molecular beam. At low nozzle temperatures, some of the clusters show considerably broadened beam profiles due to non-uniform deflection in the magnetic field. The results reflect the influence of the chemical environment on the magnetic properties of the transition metal in atomic domain magnetic nanoalloys. Different ground state spin multiplicities and coupling of rotational and vibrational degrees of freedom with the spin angular momentum of isolated clusters of different size apparently cause these variations of spin orientation. This is discussed by taking electronic and molecular structure data into account.

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Section: Beam Deflection Experimentsmentioning

confidence: 99%

Atomic domain magnetic nanoalloys: interplay between molecular structure and temperature dependent magnetic and dielectric properties in manganese doped tin clusters

Rohrmann

Schwerdtfeger

2014

Phys. Chem. Chem. Phys.

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“…(25), (27), and (28) it is clear that the deflection angle of a molecule in a |J , m state is given by Eq. (25), (27), and (28) it is clear that the deflection angle of a molecule in a |J , m state is given by Eq.…”

Section: Quantum Treatmentmentioning

confidence: 99%

Electric deflection of rotating molecules

Gershnabel

Averbukh

2011

The Journal of Chemical Physics

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We provide a theory of the deflection of polar and nonpolar rotating molecules by inhomogeneous static electric field. Rainbowlike features in the angular distribution of the scattered molecules are analyzed in detail. Furthermore, we demonstrate that one may efficiently control the deflection process with the help of short and strong femtosecond laser pulses. In particular, the deflection process may be turned off by a proper excitation, and the angular dispersion of the deflected molecules can be substantially reduced. We study the problem both classically and quantum mechanically, taking into account the effects of strong deflecting field on the molecular rotations. In both treatments we arrive at the same conclusions. The suggested control scheme paves the way for many applications involving molecular focusing, guiding, and trapping by inhomogeneous fields.

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“…The produced distribution of species includes pure clusters of water as well as mixed ones containing one, two or more acid molecules. The beam passes through a skimmer into a second vacuum chamber, where it is collimated and then travels through the region of an inhomogeneous "two-wire" [12] electric field created by a 15 cm long pair of metal electrodes. By applying voltages of up to 27.5 kV between the electrode plates, electric fields and field gradients of up to 80 kV/cm and 380 V/cm 2 , respectively, are created.…”

Section: Methodsmentioning

confidence: 99%

Electric Dipole Moments of Nitric Acid-Water Complexes Measured by Cluster Beam Deflection

Moro¹,

Heinrich²,

Kresin³

2009

AIP Conference Proceedings

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Abstract. Water clusters embedding a nitric acid molecule HNO 3 (H 2 O) n=1−10 are investigated via electrostatic deflection of a molecular beam. We observe large paraelectric susceptibilities that greatly exceed the electronic polarizability, revealing the contribution of permanent dipole moments. The moments derived from the data are also significantly higher than those of pure water clusters. An enhancement in the susceptibility for n=5,6 and a rise in cluster abundances setting in at n=6 suggest that dissociation of the solvated acid molecule into ions takes place in this size range.

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Velocity distribution measurement and two-wire field effects for electric deflection of a neutral supersonic cluster beam

Abstract: A triply differentially pumped supersonic beam target for high-resolution collision studies Rev.

Cited by 21 publications

References 13 publications

Atomic domain magnetic nanoalloys: interplay between molecular structure and temperature dependent magnetic and dielectric properties in manganese doped tin clusters

Atomic domain magnetic nanoalloys: interplay between molecular structure and temperature dependent magnetic and dielectric properties in manganese doped tin clusters

Electric deflection of rotating molecules

Electric Dipole Moments of Nitric Acid-Water Complexes Measured by Cluster Beam Deflection

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