Spectroscopy of the Muonium Atom

Jungmann, Klaus-Peter

doi:10.1007/3-540-45395-4_5

Cited by 5 publications

(5 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A determination of the Lamb shift in muonium with this accuracy will provide a stringent test of high-order recoil corrections in bound state QED [52,53], free of finite-size effects [1]. Moreover, it will be a sensitive probe for the existence of exotic dark-sector particles [54], new muonic forces [55], and hidden dimensions [56,57].…”

Section: Discussionmentioning

confidence: 98%

Intense beam of metastable Muonium

et al. 2020

View full text Add to dashboard Cite

Precision spectroscopy of the Muonium Lamb shift and fine structure requires a robust source of 2S Muonium. To date, the beam-foil technique is the only demonstrated method for creating such a beam in vacuum. Previous experiments using this technique were statistics limited, and new measurements would benefit tremendously from the efficient 2S production at a low energy muon (< 20 keV) facility. Such a source of abundant low energy μ + has only become available in recent years, e.g. at the Low-Energy Muon beamline at the Paul Scherrer Institute. Using this source, we report on the successful creation of an intense, directed beam of metastable Muonium. We find that even though the theoretical Muonium fraction is maximal in the low energy range of 2-5 keV, scattering by the foil and transport characteristics of the beamline favor slightly higher μ + energies of 7-10 keV. We estimate that an event detection rate of a few events per second for a future Lamb shift measurement is feasible, enabling an increase in precision by two orders of magnitude over previous determinations.

show abstract

Section: Discussionmentioning

confidence: 98%

Intense beam of metastable Muonium

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In particular the HFS for the s 1 and s 2 levels of the muonic hydrogen coincide with those commonly accepted within the declared error. The same occurs for the p 1 2 and p 3 2 HFS of the muonium [12]. A lower agreement, instead, is observed for D 21 and for the pwave HFS of the muonic hydrogen.…”

Section: The Spectral Problem For the Hfsmentioning

confidence: 51%

“…The same procedure was used in [6] to calculate the meson masses even in d-and f-wave, with an excellent agreement with measurements, especially for heavy mesons. Here also we reproduce the available experimental data and most of the theoretical results [2,10,12,13] with an accuracy up to some units times 10 −5 . In particular the HFS for the s 1 and s 2 levels of the muonic hydrogen coincide with those commonly accepted within the declared error.…”

Section: The Spectral Problem For the Hfsmentioning

confidence: 69%

See 1 more Smart Citation

Relativistic two fermion treatment of hyperfine transitions

Barducci

Giachetti

Sorace

2015

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

View full text Add to dashboard Cite

A system of two fermions with different masses and interacting by the Coulomb potential is presented in a completely covariant framework. The spin-spin interaction, including the anomalous magnetic moments of the two fermions, is added by means of a Breit term. We solve the resulting fourth order differential system by evaluating the spectrum and the eigenfunctions. The interaction vertex with an external electromagnetic field is then determined. The relativistic eigenfunctions are used to study the photon emission from a hyperfine transition and are checked for the calculation of the Lamb shift due to the electron vacuum polarization in the muonic Hydrogen.

show abstract

“…Using the much larger isotope effect of muonium [8,108] Roduner could obtain further information [109]: The competing effects zero-point energy and tunnel effect could be separated from the kinetic isotope effect as follows: if k Mu /k H < 1 the zero-point energy dominates in the transition state, and k Mu /k H > 1 for the domination of the tunnel effect.…”

Section: Selected Examplesmentioning

confidence: 99%

Isotope Effects in ESR Spectroscopy

Stößer

Herrmann

2013

Molecules

View full text Add to dashboard Cite

In order to present the relationship between ESR spectroscopy and isotope effects three levels are considered: (i) ESR spectroscopy is described on a general level up to the models for interpretation of the experimental spectra, which go beyond the usually used time and mass independent spin-Hamilton operator, (ii) the main characteristics of the generalized isotope effects are worked out, and finally (iii) the basic, mainly quantum mechanical effects are used to describe the coupling of electron spins with the degrees of freedom, which are accessible under the selected conditions, of the respective paramagnetic object under investigation. The ESR parameters and the respective models are formalized so far, that they include the time and mass depending influences and reflect the specific isotope effects. Relations will be established between the effects in ESR spectra to spin relaxation, to spin exchange, to the magnetic isotope effect, to the Jahn-Teller effects, as well as to the influence of zero-point vibrations. Examples will be presented which demonstrate the influence of isotopes as well as the kind of accessible information. It will be differentiated with respect to isotope effects in paramagnetic centres itself and in the respective matrices up to the technique of ESR imaging. It is shown that the use of isotope effects is indispensable in ESR spectroscopy.

show abstract

Spectroscopy of the Muonium Atom

Cited by 5 publications

References 52 publications

Intense beam of metastable Muonium

Intense beam of metastable Muonium

Relativistic two fermion treatment of hyperfine transitions

Isotope Effects in ESR Spectroscopy

Contact Info

Product

Resources

About