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pro vyhledávání: '"F Bayer-Helms"'
Autor:
F. Bayer-Helms
Publikováno v:
Physik Journal. 39:307-312
Die XVII. Generalkonferenz fur Mas und Gewicht wird voraussichtlich im Oktober 1983 eine neue Definition der Basiseinheit Meter beschliesen. Diese beruht auf der Festlegung des Wertes fur die Lichtgeschwindigkeit c = 299 792 458 m/s und damit auch au
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8539f8361c21d3aaa0c12c78bbb13c2d
https://doi.org/10.1002/phbl.19830390902
https://doi.org/10.1002/phbl.19830390902
Autor:
F Bayer-Helms
Publikováno v:
Metrologia. 23:145-151
Measurements of long-term dimensional stability on test samples of the glass ceramic "Zerodur", published earlier, are interpreted as a consequence of a diffusion process in the amorphous areas of the glass ceramic. The time-functions derived on the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5416996625ed58643e0d78f1e62baf4f
https://doi.org/10.1088/0026-1394/23/3/003
https://doi.org/10.1088/0026-1394/23/3/003
Publikováno v:
Metrologia. 21:49-57
"Zerodur", a glass ceramic, has been developed in order to have a material with an extremely small thermal expansion coefficient. The known physical properties are completed here by results on dimensional stability compiled over a number of years. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::334dd428c4590f626c230a3ce7e3e19c
https://doi.org/10.1088/0026-1394/21/2/002
https://doi.org/10.1088/0026-1394/21/2/002
Autor:
F. Bayer-Helms
Publikováno v:
Zeitschrift f�r Physik. 154:175-181
Mit angereichertem Isotop83Kr werden bereits bekannte Termaufspaltungen bestatigt und die Hyperfeinstrukturen einiger 3p Terme neu bestimmt. Die Aufspaltungsfaktoren der Elektronen werden mit Hilfe der Theorie der mittleren Kopplung berechnet.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c4f27c3ea6da004d67c9d330716eb22
https://doi.org/10.1007/bf01338374
https://doi.org/10.1007/bf01338374
Autor:
E J G Engelhard, F Bayer-Helms
Publikováno v:
Metrologia. 8:91-95
A hot cathode 114Cd, as well as a watercooled hot cathode 198Hg lamp were recently designed. The line profiles of the visible radiations produced by use of these were investigated and the wavelengths measured. The result is that under certain conditi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15d42e0c84ce7acbd41ac78aaf006449
https://doi.org/10.1088/0026-1394/8/3/002
https://doi.org/10.1088/0026-1394/8/3/002
Autor:
F Bayer-Helms
Publikováno v:
Metrologia. 22:201-203
This brief survey concerns the history of the international unit of length, the metre, general considerations on definitions and their realizations, reasons for introducing a new definition, consequences of the last definition of the metre, and some
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbcbf50f06273079a8f96f6697afd8af
https://doi.org/10.1088/0026-1394/22/3/016
https://doi.org/10.1088/0026-1394/22/3/016
Autor:
F Bayer-Helms, J Helmcke
Publikováno v:
Metrologia. 10:69-71
Mechanical design and electronic circuit are described. Locking to one of the absorption lines of 129J2 has been achieved with the third harmonic of the modulation frequency in the power output. The wavelength of the laser stabilized to the component
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79c017fb827ae23064441ab7fc679754
https://doi.org/10.1088/0026-1394/10/2/005
https://doi.org/10.1088/0026-1394/10/2/005
Autor:
F Bayer-Helms
Publikováno v:
Applied Optics. 23:1369
Coupling coefficients describe the excitation of eigenfunctions by an incident wave. They are derived here for each of the two systems of eigenfunctions of a spherical resonator, characterized by Hermite or Laguerre polynomials, and for incident wave
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61c562e0f342300add6f9f2849ad1702
https://doi.org/10.1364/ao.23.001369
https://doi.org/10.1364/ao.23.001369
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