Rydberg Series in Strontium Found in Absorption by Selectively Laser-Excited Atoms

Rubbmark, J R; Borgstrom, S

doi:10.1088/0031-8949/18/4/002

Cited by 75 publications

(50 citation statements)

References 18 publications

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“…Autoionization with a tightly focused laser beam was also used to measure the spatial distribution of Rydberg atoms [44]. Calculations of long-range interactions [32] based on the known quantum defects [45][46][47][48][49] [32]. The present experimental results support these calculations.…”

Section: Introductionsupporting

confidence: 73%

Imaging the evolution of an ultracold strontium Rydberg gas

et al. 2013

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Clouds of ultracold strontium 5s48s 1 S 0 or 5s47d 1 D 2 Rydberg atoms are created by two-photon excitation of laser-cooled 5s 2 1 S 0 atoms. The spontaneous evolution of the cloud of low orbital angular momentum (low-) Rydberg states towards an ultracold neutral plasma is observed by imaging resonant light scattered from core ions, a technique that provides both spatial and temporal resolution. Evolution is observed to be faster for the S states, which display isotropic attractive interactions, than for the D states, which exhibit anisotropic, principally repulsive interactions. Immersion of the atoms in a dilute ultracold neutral plasma speeds up the evolution and allows the number of Rydberg atoms initially created to be determined.

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Section: Introductionsupporting

confidence: 73%

Imaging the evolution of an ultracold strontium Rydberg gas

et al. 2013

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“…We used the energies of references [22,[31][32][33][34] in view of their higher accuracy. The values of the δ 0 , δ 2 and δ 4 coefficients are given in Table II.…”

Section: B Energy Levelsmentioning

confidence: 99%

Long-range Rydberg–Rydberg interactions in calcium, strontium and ytterbium

Vaillant

Jones²,

Potvliege

2012

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

127

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Long-range dipole-dipole and quadrupole-quadrupole interactions between pairs of Rydberg atoms are calculated perturbatively for calcium, strontium and ytterbium within the Coulomb approximation. Quantum defects, obtained by fitting existing laser spectroscopic data, are provided for all S, P , D and F series of strontium and for the 3 P2 series of calcium. The results show qualitative differences with the alkali metal atoms, including isotropically attractive interactions of the strontium 1 S0 states and a greater rarity of Förster resonances. Only two such resonances are identified, both in triplet series of strontium. The angular dependence of the long range interaction is briefly discussed.

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“…They arise because the investigated level series are crossing each other or other series. It can be nicely demonstrated by plotting the moduli of the quantum defects of the known series in Sr [5,6] against the effective principal quantum number n* (Fig. 5).…”

Section: Resultsmentioning

confidence: 87%

“…On the other hand recent measurements of depopulation cross sections of high-lying Rb levels by noble gases [-4] gave data which are systematically smaller than the inelastic contributions of the theory by Alekseev and Sobelman indicating an underestimation of the theoretical elastic contributions or an overestimation of the theoretical inelastic ones. By choosing the alkaline-earth element Sr we intended to study three different aspects: (i) Different series of energy levels cross at particular values of binding energy [5,6] and we expect large inelastic contributions to the broadening to accompany such local degeneracies.…”

Section: Introductionmentioning

confidence: 99%

Impact broadening of Sr 5sns 1 S 0, 5snd 1D2 and 5snd 3 D 2 levels by He and Xe

Weber

Niemax

1982

Z Physik A

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The impact broadening of strontium 5sns 1So, 5snd ID 2 and 5snd 3D 2 levels by He and Xe have been studied by measuring the collisional half-widths of Doppler-free twophoton absorption lines from the 5s 2 aS 0 ground state in a thermionic diode. Large inelastic contributions to the broadening rates of the levels have been found where the moduli of the quantum defects of different level series are close to each other. A similar but continuous n-mixing behaviour along the series has also been found in our recent investigation on the broadening of Rb levels by noble gases. The broadening rates of the very high levels in Sr were found to be independent on the principal quantum number and the angular momentum of the levels and in good agreement with our recent broadening data of the Rb-He and Rb-Xe systems and the data for Na-He and Na-Xe found by the Columbia group.

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Rydberg Series in Strontium Found in Absorption by Selectively Laser-Excited Atoms

Abstract: are also interesting because of the strong interactions appearing between the singly-excited and the doubly-excited configur-Rydberg series in strontium found in absorption by selectively laserations.excited atoms.

Cited by 75 publications

References 18 publications

Imaging the evolution of an ultracold strontium Rydberg gas

Imaging the evolution of an ultracold strontium Rydberg gas

Long-range Rydberg–Rydberg interactions in calcium, strontium and ytterbium

Impact broadening of Sr 5sns 1 S 0, 5snd 1D2 and 5snd 3 D 2 levels by He and Xe

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