Study of Rydberg-atom<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>l</mml:mi></mml:math>-changing collisions using selective field ionization

Kellert, F. G.; Jeys, T. H.; McMillian, G.; Smith, K. A.; Dunning, F. B.; Stebbings, R. F.

doi:10.1103/physreva.23.1127

Cited by 53 publications

(5 citation statements)

References 24 publications

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“…At the high n and l of this work, interactions between levels are small, and even for the slow field ramp used, atoms traverse the crossings diabatically, without changing state. For a given n, the distribution of field values at which different sublevels ionize begins at F diab F 0 ͑͞9n 4 ͒, where F 0 5.14 3 10 9 V͞cm [14], and has a tail that extends up to 2-3 times higher [16]. Simulations based on the decay rates of hydrogenic Stark states [17] indicate that for equal population of all sublevels, the average ionization field exceeds F diab by about 50%.…”

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confidence: 99%

Formation of Rydberg Atoms in an Expanding Ultracold Neutral Plasma

et al. 2001

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We study the formation of Rydberg atoms in expanding plasmas at temperatures of 1-1000 K and densities from 10(5)-10(10) cm(-3). Up to 20% of the initially free charges recombine in about 100 micros, and the binding energy of the Rydberg atoms approximately equals the increase in the kinetic energy of the remaining free electrons. Three-body recombination is expected to dominate in this regime, yet most of our results are inconsistent with this mechanism.

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Formation of Rydberg Atoms in an Expanding Ultracold Neutral Plasma

et al. 2001

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“…High Rydberg states are very sensitive to their environment, and, in general (including in the experiments described here), the delayed pulsed field probes a mixed population of Rydberg states which can differ significantly from the optically prepared population of low l, low m states [3,5]. l and m mixing may occur as a result of inhomogeneous stray electric fields [3,6] or collisions with neighboring particles [1][2][3][7][8][9]. Our ultimate goal is to assess the importance of these mechanisms from the analysis of the response of the Rydberg state population to pulsed electric fields.…”

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Electric Field Ionization of High Rydberg States of Ar with Sequences of Identical Pulses

Merkt¹,

Rednall²,

Mackenzie³

et al. 1996

Phys. Rev. Lett.

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Novel field-ionization behavior of very high Rydberg states of Ar (n 50 250) is observed using sequential pulsed electric fields. Fast autoionization acts as a filter against adiabatic field ionization near the 2 P 1͞2 threshold, whereas both diabatic and adiabatic field ionization occur near the 2 P 3͞2 threshold. Sequences of up to 9 equivalent pulses yield recurrent field ionization signals near the 2 P 3͞2 threshold, provided that the field returns close to zero between pulses, demonstrating a statistical redistribution of the Rydberg population amongst all states of a given Stark manifold near zero field. [S0031-9007(96)

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“…In both figures three regions indicate in different shades of grey, where n-manifolds are not, partly, or entirely ionised nitude B ∼ 4 mT, which we thus considered negligible for low n, will start playing a role for high n-states. Effects from non-adiabatic coupling of high n-states will also affect the ionisation rates [72]. Thus, the formula we used will only give an approximate range of ionisation for high n-states.…”

Section: Quantum State Distributionmentioning

confidence: 99%

Measurement of the principal quantum number distribution in a beam of antihydrogen atoms

et al. 2021

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The ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration plans to measure the ground-state hyperfine splitting of antihydrogen in a beam at the CERN Antiproton Decelerator with initial relative precision of $$10^{-6}$$ 10 - 6 or better, to test the fundamental CPT (combination of charge conjugation, parity transformation and time reversal) symmetry between matter and antimatter. This challenging goal requires a polarised antihydrogen beam with a sufficient number of antihydrogen atoms in the ground state. The first measurement of the quantum state distribution of antihydrogen atoms in a low magnetic field environment of a few mT is described. Furthermore, the data-driven machine learning analysis to identify antihydrogen events is discussed. Graphic Abstract

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Study of Rydberg-atoml-changing collisions using selective field ionization

Cited by 53 publications

References 24 publications

Formation of Rydberg Atoms in an Expanding Ultracold Neutral Plasma

Formation of Rydberg Atoms in an Expanding Ultracold Neutral Plasma

Electric Field Ionization of High Rydberg States of Ar with Sequences of Identical Pulses

Measurement of the principal quantum number distribution in a beam of antihydrogen atoms

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