Fine Structure of the Hydrogen Atom. IV

Lamb, Willis E.; Retherford, Robert C.

doi:10.1103/physrev.86.1014

Cited by 82 publications

(25 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pasternack [41] analyzed those deviations between observations and the theory and showed they could be explained by an upward shift of the 2S 1/2 level by about 0.03 cm À1 (equivalent to %1 GHz). The reality of this shift was later convincingly proven by the series of experiments of Lamb and co-workers [9,[42][43][44][45][46][47]. It was explained by the new QED theory developed first by Bethe [48,49].…”

Section: Brief Historical Reviewmentioning

confidence: 86%

“…At the level of resolution achieved in the experiments of Lamb et al [42][43][44][45][46][47], it became important to account for the hyperfine structure in the hydrogen and deuterium spectra. The currently accepted definition of the hfs can be found in Woodgate's textbook [7].…”

Section: Brief Historical Reviewmentioning

confidence: 99%

“…The 2P 1/2 -2S 1/2 transition frequency was measured by Cosens [153] by a radio-frequency (rf) method similar to that of Lamb et al [42][43][44][45][46][47]. In this type of experiment, an atomic beam is excited to the metastable 2S state by an electron beam.…”

Section: Level Optimization For Hydrogenmentioning

confidence: 99%

“…Cosens [153], following Lamb et al [42][43][44][45][46][47], assumed that the distribution had a U 2 exp(ÀU 2 ) dependence, where U is a dimensionless velocity variable, U 2 = (Mv 2 /2kT) (M is the mass of the atom, v is its velocity, T is the temperature, and k is Boltzmann's constant). However, measurements by Robiscoe and Shyn [154] showed that the actual velocity distribution was close to U 4 exp(ÀU 2 ).…”

Section: Level Optimization For Hydrogenmentioning

confidence: 99%

See 3 more Smart Citations

A critical compilation of experimental data on spectral lines and energy levels of hydrogen, deuterium, and tritium

Kramida

2010

Atomic Data and Nuclear Data Tables

View full text Add to dashboard Cite

Section: Brief Historical Reviewmentioning

confidence: 86%

Section: Brief Historical Reviewmentioning

confidence: 99%

Section: Level Optimization For Hydrogenmentioning

confidence: 99%

Section: Level Optimization For Hydrogenmentioning

confidence: 99%

See 2 more Smart Citations

A critical compilation of experimental data on spectral lines and energy levels of hydrogen, deuterium, and tritium

Kramida

2010

Atomic Data and Nuclear Data Tables

View full text Add to dashboard Cite

“…Surely, under the non-relativistic approximation, they can reduce back to the Schrödinger equation and meanwhile the orbit-spin coupling and relativistic correction terms which were added into the non-relativistic Hamiltonian by hand, automatically appear. Nowadays, as the detection technique and instrumentation are ceaselessly improved, small deviation between theoretical predictions and observational data may be exposed, such as the Lamb shift [1,2,3], and it enables one to investigate the tiny difference caused by various theoretical models.…”

Section: Introductionmentioning

confidence: 99%

Symmetry of Dirac Equation and Corresponding Phenomenology

Zuo

Chen

et al. 2010

Int. J. Mod. Phys. A

View full text Add to dashboard Cite

r for hydrogen atom and κr 2 for harmonic oscillator. However, in the case of hydrogen atom, by this combination the spin-orbit coupling term would not exist and it is inconsistent with the observational spectra of hydrogen atom, so that the symmetry of SO(4) must reduce into SU(2).The governing mechanisms QED and QCD which induce potential are vector-like theories, so at the leading order only vector potential exists. However, the higher order effects may cause a scalar fraction. In this work, we show that for QED, the symmetry restoration is very small and some discussions on the symmetry breaking are made. At the end, we briefly discuss the QCD case and indicate that the situation for QCD is much more complicated and interesting.

show abstract

Atom interferometer using two Stern-Gerlach magnets

et al. 2004

View full text Add to dashboard Cite

An atom interferometer using two Stern-Gerlach magnets as polariser and analyser is described. The interferometer was first operated with a thermal beam of ground state potassium atoms. In that case the beam splitters are two radiofrequency zones within a transverse homogeneous magnetic field building a coherent superposition of Zeeman states. Ramsey fringes are obtained by scanning the RF-frequency through the resonance profile. Pulsing the RF power allows to get the timeof-flight distribution of the beam. Atomic interference fringes ("Stern-Gerlach fringes") are observed when the magnitude of an inhomogeneous magnetic field located in between the beam splitters is scanned. When the inhomogeneous field is also pulsed, the scalar Bohm-Aharonov effect is observed. The use of metastable helium atoms (He * 2 3 S) in place of potassium atoms is proposed. In addition to the usual advantages provided by metastable atoms of high internal energy, this atom offers the specific advantage to behave as an ideal spin-one particle. This allows us to greatly simplify the polarisation scheme of the interferometer. Possible applications involving transversally inhomogeneous magnetic fields are given and limitations due to the finite source size and angular aperture are discussed. Ramsey interference pattern obtained by scanning the RF frequency around 2.307 MHz (resonance). The RF power is such that the atoms experience two subsequent π/2 -pulses. The absolute contrast of the fringes is about 30%.

show abstract

Fine Structure of the Hydrogen Atom. IV

Cited by 82 publications

References 15 publications

A critical compilation of experimental data on spectral lines and energy levels of hydrogen, deuterium, and tritium

A critical compilation of experimental data on spectral lines and energy levels of hydrogen, deuterium, and tritium

Symmetry of Dirac Equation and Corresponding Phenomenology

Atom interferometer using two Stern-Gerlach magnets

Contact Info

Product

Resources

About