2 edition of **A precise determiniation of the fine structure constants for Cr(3+) in ruby** found in the catalog.

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- 23 Currently reading

Published
**1965**
by Naval Postgraduate School in Monterey, California
.

Written in English

- Physics

**Edition Notes**

Contributions | Naval Postgraduate School (U.S.) |

The Physical Object | |
---|---|

Pagination | 1 v. : |

ID Numbers | |

Open Library | OL25158673M |

By the s, it became clear that the value of the fine-structure constant deviates significantly from the precise value of 1/, refuting Eddington's argument. [3] With the development of quantum chemistry in the 20th century, however, a vast number of previously inexplicable dimensionless physical constants were successfully computed from. Perhaps the best-known example is the fine-structure constant, α, which has an approximate value of 1 ⁄ The correct use of the term fundamental physical constant should be restricted to the dimensionless universal physical constants that currently cannot be derived from any other source.

@article{osti_, title = {The Effect of Quantum-Mechanical Interference on Precise Measurements of the n = 2 Triplet P Fine Structure of Helium}, author = {Marsman, A. and Horbatsch, M. and Hessels, E. A., E-mail: [email protected]}, abstractNote = {For many decades, improvements in both theory and experiment of the fine structure of the n = 2 triplet P levels of helium have allowed . The fundamental constants that govern the laws of nature are being determined with increasing accuracy. A new paper outlines the proceedings from this year's Workshop on the Determination of the.

Learn about this topic in these articles: atomic spectra. In fine structure a dimensionless constant called the fine-structure constant. This constant is given by the equation α = ke 2 /hc, where k is Coulomb’s constant, e is the charge of the electron, h is Planck’s constant, and c is the speed of light. The value of the constant α is × 10 −3,. Our result of 29,,+/ kHz is the most precise measurement of helium 2(3)P fine structure. When compared to precise theory for this interval, this measurement leads to a determination of.

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Enter the password to open this PDF file: Cancel OK. File name:. In physics, the fine-structure constant, also known as Sommerfeld's constant, commonly denoted by α (the Greek letter alpha), is a fundamental physical constant characterizing the strength of the electromagnetic interaction between elementary charged particles.

It is a dimensionless quantity related to the elementary charge e, which characterizes the strength of the coupling of an elementary. A precise determiniation of the fine structure constants for Cr(3⁺) in ruby.

By Gary D. Hutton. Download PDF (3 MB) Abstract. The aluminum oxide crystal, Al₂0₃, doped with a small amount of chromium, which is called ruby, is widely used in solid state physics research and applications. A precise determiniation of the fine structure Author: Gary D. Hutton. helium atom, specifically measuring the helium fine structure to very high precision, is as a determination of the fine structure constant α.

The fine structure constant is the fundamental constant of nature that governs the strength the electromagnetic interaction and is the only true adjustable parameter in QED theory.

Fine Structure Constant reciprocal ((51)) results in a single primitive Pythagorean Triple that forms 9X the number of multiples above any other primitive triple suggesting it is the exact value of this constant: 1.

Integer based derivations used in the analysis. "Summary Review of Sommerfeld's Fine-Structure Constant" Overview of previous research papers, updated title and a new connection to the work of Alfred Landé and the anomalous magnetic moment of.

Precise determination of Newtonian gravitational constantG. including determination of gravitational constant and fine structure constant, measurement of gravity, gravity gradient and rotation. The fine-structure constant α [1] is a constant in physics that plays a fundamental role in the electromagnetic interaction.

It is a dimensionless constant, defined as: (1) being q the elementary charge, ε0 the vacuum permittivity, h the Planck constant and c the speed of light in vacuum. The value shown in (1) is according CODATA [2].

S Precise determination of the fine structure constant: impact on the new International System of Units. Authors: S. Bade1, P. Cladé (1), F. Firaben and S. Guellati-Khélifa (1), 2. Affiliation of authors: (1) Laboratoire Kastler Brossel, UPMC-ENS-Collège de France, 4 place Jussieu Paris.

In mathematics, the structure constants or structure coefficients of an algebra over a field are used to explicitly specify the product of two basis vectors in the algebra as a linear the structure constants, the resulting product is bilinear and can be uniquely extended to all vectors in the vector space, thus uniquely determining the product for the algebra.

The inverse fine-structure constant is essentially equivalent to 1/, although the precise figure is Remarkably, it can be approximated by these elegant equations: α ≈ 1/(cos(π/)/) % accuracy. The Number is well-known throughout the physics community as the approximate inverse of the Fine Structure constant.

It even has a name - alpha - which seems to be a supernatural coincidence given the context in which this number appears - John - and the numerous highly significant identities associated with the Greek word Alpha.

My posts on the fine-structure constant – God’s Number as it is often referred to – have always attracted a fair amount of views. I think that’s because I have always tried to clarify this or that relation by showing how and why exactly it pops us in this or that formula (e.g. Rydberg’s energy formula, the ratio of the various radii of an electron (Thomson, Compton and Bohr radius.

Measurements of the fine-structure constant using different systems. Precision tests of QED have been performed in low-energy atomic physics experiments, high-energy collider experiments, and condensed matter systems.

The value of α is obtained in each of these experiments by fitting an experimental measurement to a theoretical expression (including higher-order radiative corrections). High-resolution spectroscopy of quasar (QSO) absorption systems provides a precise probe of fundamental physics.

In previous papers (Dzuba, Flambaum & Webb a, b; Webb et al.hereafter W99) we introduced and applied a new and highly sensitive method for constraining space–time variations of the fine-structure constant.

The quest to determine whether the bare fine-structure constant, α, is a constant in space and time has received impetus from the recognition that there might be additional dimensions of space or that our constants are partly or wholly determined by symmetry breaking at ultrahigh energies in the very early universe.

A series of precise measurements of the hyperfine structure (hfs) of nine metastable levels in a chromium atom 53 Cr has been performed. For eight levels the hfs has been investigated with the method of laser induced fluorescence (LIF) on an atomic beam, and for the lowest-lying metastable level 3d 5 4s 5 S 2 a still more precise method of laser-rf double resonance on an atomic beam.

Metrology The fine-structure constant, α, is a dimensionless constant that characterizes the strength of the electromagnetic interaction between charged elementary particles. Related by four fundamental constants, a precise determination of α allows for a test of the Standard Model of particle physics.

Parker et al. used matter-wave interferometry with a cloud of cesium atoms to make the. Degree of fine tuning. Recent Studies have confirmed the fine tuning of the cosmological constant (also known as "dark energy").

This cosmological constant is a force that increases with the increasing size of the universe. First hypothesized by Albert Einstein, the cosmological constant was rejected by him, because of lack of real world data. However, recent supernova 1A data demonstrated the. The most precise determination of the fine structure constant comes from combining this measurement with Standard Model theory, yielding [alpha]-1 = (34) [ ppb], limited by the experimental uncertainty of the electron g-value.

The key to the electron mass is, perhaps surprisingly, the definition of the Rydberg constant from atomic spectroscopy: R ∞ = α 2 m e c/2h, which involves the fine-structure constant α, the mass of the electron m e, the speed of light in vacuum c, and the Planck constant h, all of which we take to be expressed in SI units.

The specification.The fine structure constant is one of the fundamental constants in nature, just like the speed of light or Planck's constant. It is there, and that's all we know for sure. We don't really have a compelling theory on its origin, nor a mechanism that explains its value.

In short, the fine structure constant is .Quasar absorption lines provide a precise test of whether the fine-structure constant, α, is the same in different places and through cosmological time.

We present a new analysis of a large sample of quasar absorption-line spectra obtained using the Ultraviolet and Visual Echelle Spectrograph (UVES) on the Very Large Telescope (VLT) in Chile.