Alkali Polarizabilities by the Atomic Beam Electrostatic Deflection Method

Chamberlain, G. E.; Zorn, Jens C.

doi:10.1103/physrev.129.677

Cited by 107 publications

(25 citation statements)

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“…Just a few years later, the deflection of molecules by an inhomogeneous electric field was demonstrated. 4,5 Various deflector shapes and techniques have evolved to optimize the process, [6][7][8][9] and an overview of various early experimentally employed deflection-field geometries was already presented in Ramsey's textbook on molecular beams. 10 Modern experiments typically employed geometries approximating two-wire fields.…”

Section: Introductionmentioning

confidence: 99%

“…The polarizability interaction was also used in the deceleration of hydrogen molecules in Rydberg states 35 and in weak-deflection polarizability measurements. 6,36 In addition, inhomogeneous ac-and dc-electric fields are a) Electronic mail: sebastian.trippel@cfel.de b) Electronic mail: jochen.kuepper@cfel.de. URL: https://www.controlledmolecule-imaging.org.…”

Section: Introductionmentioning

confidence: 99%

“…10 Modern experiments typically employed geometries approximating two-wire fields. 6,7 The technique allowed for a wide range of applications, such as the separation of molecules in individual rotational states, [11][12][13] of conformers, [14][15][16] and of specific molecular clusters. 17 Additionally, the deflector enables the separation of polar molecules from the seed gas, which is relevant, for instance, for gas-phase diffraction experiments.…”

Section: Introductionmentioning

confidence: 99%

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Improved spatial separation of neutral molecules

Kienitz

Długołȩcki

Trippel

et al. 2017

The Journal of Chemical Physics

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We have developed and experimentally demonstrated an improved electrostatic deflector for the spatial separation of molecules according to their dipole-moment-to-mass ratio. The device features a very open structure that allows for significantly stronger electric fields as well as for stronger deflection without molecules crashing into the device itself. We have demonstrated its performance using the prototypical OCS molecule and we discuss opportunities regarding improved quantum-state-selectivity for complex molecules and the deflection of unpolar molecules.Comment: 6 figure

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improved spatial separation of neutral molecules

Kienitz

Długołȩcki

Trippel

et al. 2017

The Journal of Chemical Physics

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“…Fine tuning of the selected state was done by optimizing the ionization signal resulting from a pulsed ionizing electric field applied in the excitation region about 1 ps after the laser pulse. The excited atoms passed through a 'two-wire type' inhomogeneous electric field of the same geometry as that used by Chamberlain and Zorn (1963) for determining ct0 of the ground-state alkali atoms; its geometry is given in figure 3 of their publication.…”

mentioning

confidence: 99%

“…We have G = 4.23 x lo6 m-3 (Chamberlain 1961), 1 = 0.050 m and 1' = 0.295 m. Beam profiles were measured with several different deflection voltages for each state. Measurements are not yet accurate enough for a complete theoretical analysis of the beamprofile function.…”

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confidence: 99%

Measurement of the scalar polarizability of very highly excited states of caesium

Raan¹,

Baum²,

Raith³

1976

J. Phys. B: At. Mol. Phys.

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Abstract, First results on the scalar polarizability tx0 of a number of very highly excited p states of Cs (40 < n < 60), produced by one-step photoexcitation with frequencydoubled dye-laser radiation, were obtained by means of electrostatic beam deflection in a two-wire type electric field. Enormous polarizabilities of u0/4n > lo9 A3 were measured; the dependence of the polarizability as a function of the principal quantum number n was found to be in agreement with the expected n7 behaviour.The energy change of an atom exposed to a weak electric field of strength E is given by the Stark Hamiltonianwhere a. and a2 are respectively the scalar and tensor polarizabilities (Khadjavi et al 1968), J , is the projection of the total electronic angular momentum J in the direction of the electric field, and eo is the vacuum permittivity. In strong electric fields the Stark effect cannot be treated as a perturbation to the fine-structure interaction and, consequently, J and J , of equation (1) have to be replaced by the orbital angular momentum L and its projection L,. In equation (1) the a. term describes the average energy shift of all sublevels and the a2 term the Stark level splitting. Both effects are expected to scale with n7 (Wing et a1 1973).The Stark effect of excited states of alkali atoms has been of great interest recently (Hogervorst and Svanberg 1975, Harvey et al 1975, Fabre and Haroche 1975, Littman et a1 1976. Most spectroscopic measurements have only produced data on the tensor polarizability a2 and have covered only two or three adjacent n values. Fabre and Haroche (1975) measured a2 for the sodium d states with n = 10, 11, 12 by quantumbeat spectroscopy and obtained very large values in accordance with the n7 scaling. Experimental data of the scalar polarizability, ao, are available for the s ground states of all alkali metals (Molof et a1 1974, Hall andZorn 1974) and the 4d and 5s states of sodium (Harvey et a1 1975).Here we report the first results of direct measurements of the scalar polarizability of very highly excited p states of caesium. We measured the beam deflection in an inhomogeneous electric field ; the deflection averaged over the unresolved Stark sublevels is a measure of ao. Production and detection of the very highly excited atoms was reported in a previous letter (van Raan et al 1976); the arrangement is shown in L349

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Ab Initio Computations of Polarizabilities and Hyperpolarizabilities of Atoms and Molecules

Hasanein

1993

Advances in Chemical Physics

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Alkali Polarizabilities by the Atomic Beam Electrostatic Deflection Method

Cited by 107 publications

References 6 publications

Improved spatial separation of neutral molecules

Improved spatial separation of neutral molecules

Measurement of the scalar polarizability of very highly excited states of caesium

Ab Initio Computations of Polarizabilities and Hyperpolarizabilities of Atoms and Molecules

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