Separated Oscillatory Field Measurement of the Lamb Shift in H,<i>n</i>= 2

Lundeen, S. R.; Pipkin, F. M.

doi:10.1088/0026-1394/22/1/003

Cited by 106 publications

(81 citation statements)

References 94 publications

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“…It is not possible to infer these populations to a sufficient level of accuracy from Refs. [17] and [27]. The calculation presented here does, however, conclude that the correction can be expected to be on the 10-kHz scale.…”

Section: The H(n=2) Lamb Shiftcontrasting

confidence: 64%

“…The fields do not turn on and off suddenly, as was assumed in Section III, but rather follow the more realistic profiles described in Ref. [27].…”

Section: The H(n=2) Lamb Shiftmentioning

confidence: 87%

“…The fields along this trajectory are those identified as configuration 1 in Ref. [27]. As suggested in that reference, a trajectory that is 1.265 mm from the axis is used (as this distance is the root-meansquared distance from the axis for the extended beam of atoms in that work).…”

Section: The H(n=2) Lamb Shiftmentioning

confidence: 99%

“…As in Ref. [27], the amplitudes used for these fields are 26, 11.4, and 11 V/cm, respectively. As in the experiment, the n=2-to-n=1 radiative decay (Lyman-α fluorescence) is monitored during the quench field.…”

Section: The H(n=2) Lamb Shiftmentioning

confidence: 99%

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Interference between two resonant transitions with distinct initial and final states connected by radiative decay

2017

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The resonant line shape from driving a transition between two states, |a and |b , can be distorted due to a quantum-mechanical interference effect involving a resonance between two different states, |c and |d , if |c has a decay path to |a and |d has a decay path to |b . This interference can cause a shift of the measured resonance, despite the fact that the two resonances do not have a common initial or final state. As an example, we demonstrate that such a shift affects measurements of the atomic hydrogen 2S 1/2 -to-2P 1/2 Lamb-shift transition due to 3S-to-3P transitions if the 3S 1/2 state has some initial population.

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Section: The H(n=2) Lamb Shiftcontrasting

confidence: 64%

“…The fields do not turn on and off suddenly, as was assumed in Section III, but rather follow the more realistic profiles described in Ref. [27].…”

Section: The H(n=2) Lamb Shiftmentioning

confidence: 87%

Section: The H(n=2) Lamb Shiftmentioning

confidence: 99%

Section: The H(n=2) Lamb Shiftmentioning

confidence: 99%

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Interference between two resonant transitions with distinct initial and final states connected by radiative decay

2017

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“…Though Rabi realized that this method should also be applicable to excited atomic states [11], it seems never to have been exploited before. The measurements of Lundeen and Pipkin [12,13] provide the best direct determinations of the classical Lamb shift. Their experiment used transitions between the hyperfine structure of the 2 2 S 1/2 and 2 2 P 1/2 states.…”

mentioning

confidence: 99%

Hydrogen spectroscopy with a Lamb-shift polarimeter

Westig¹,

Engels²,

Grigoryev³

et al. 2010

Eur. Phys. J. D

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Abstract. A Lamb-shift polarimeter, which has been built for a fast determination of the polarization of protons and deuterons of an atomic-beam source and which is frequently used in the ANKE experiment at COSY-Jülich, is shown to be an excellent device for atomic-spectroscopy measurements of metastable hydrogen isotopes. It is demonstrated that magnetic and electric dipole transitions in hydrogen can be measured as a function of the external magnetic field, giving access to the full Breit-Rabi diagram for the 2 2 S 1/2 and the 2 2 P 1/2 states. This will allow the study of hyperfine structure, g factors and the classical Lamb shift. Although the data are not yet competitive with state-of-the-art measurements, the potential of the method is enormous, including a possible application to anti-hydrogen spectroscopy. The spectrum of atomic hydrogen (H), unravelled with ever increasing precision, has led to fundamental understanding of the underlying structure and dynamics of the simplest atom. Today, both experiment (e.g., two-photon laser spectroscopy [1,2]) and theory [3] have achieved an impressive level of accuracy in the determination of the energy levels. Additional details and further discoveries may come from either advancing existing techniques or by applying new methods.A possible new approach to performing spectroscopy experiments on hydrogen isotopes is based on a Lambshift polarimeter which would allow measurements of the full Breit-Rabi diagram of the first excited state of H with j = 1/2 (see Fig. 1). Precision data currently exist only for weak magnetic fields of a few Gauss for the ground state [4]. For the metastable state, the crossing of the 2 2 S 1/2 and 2 2 P 1/2 states (β − e crossing of Fig. 1) at field strengths of about 570 G was investigated long ago [5]. In addition to testing the recent relativistic theory of the Zeeman splitting of the first excited state [6,7], systematic Breit-Rabi diagram measurements can also be used to extract g j (H, 2 2 S 1/2 ), g j (H, 2 2 P 1/2 ) and the nuclear g factor. The most recent determination of a hydrogen g j factor for the ground state was performed by Tiedeman and Robinson [8]. Mass independent terms of quantum electrodynamics could be tested to a high degree and a confirmation of the α 3 radiative correction has been achieved. In order to test, e.g., bound-state quantum electrodynamic corrections of the order of α/π for the g j factor, a precision of 1 ppb and better is needed for the hydrogen atom in the ground state [9]. An even better precision would be needed for the first excited state. By putting the hydrogen atom in an external magnetic field, the independence of the hyperfine structure to such conditions can be tested through a combination of measurements of transitions between 2 2 S 1/2 and 2 2 P 1/2 states (Table 1).In 1940, Kusch et al. performed spectroscopy experiments on alkaline atoms in a magnetic field with an improved molecular beam resonance method for atoms and determined the hyperfine structure and nuclear moments from measure...

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Fundamentals of Electronic Spectroscopy

Wörner

Merkt

2011

Handbook of High‐resolution Spectroscopy

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The basic principles of electronic spectroscopy of atoms and molecules in the gas phase are presented. In the first part, the elementary concepts necessary to describe the electronic structure of atoms, diatomic molecules, and polyatomic molecules are introduced in a systematic manner, with an effort to classify the different interactions (electrostatic, spin–orbit, hyperfine) and types of motions (electronic, vibrational, rotational), which determine the energy level structures. In the second part, electronic transitions are discussed, with their spin‐rovibrational structures. Examples ranging from the simple band structure of \documentclass{article}\usepackage{amsmath}\usepackage{amssymb}\usepackage{amsbsy}\pagestyle{empty}\begin{document}$\rm{\Sigma}^{+}_{{{\rm u}}}\leftarrow \rm{\Sigma}_{{{\rm g}}}^{+}$\end{document} electronic transitions of homonuclear diatomic molecules to the highly complex band structure of polyatomic molecules subject to strong vibronic interactions are used to illustrate the richness of electronic spectra.

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Separated Oscillatory Field Measurement of the Lamb Shift in H,n= 2

Cited by 106 publications

References 94 publications

Interference between two resonant transitions with distinct initial and final states connected by radiative decay

Interference between two resonant transitions with distinct initial and final states connected by radiative decay

Hydrogen spectroscopy with a Lamb-shift polarimeter

Fundamentals of Electronic Spectroscopy

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