Measurement of the spectral distribution of the frascati electron synchrotron radiation in the (80÷1200) Å region

1970 ◽  
Vol 3 (1) ◽  
pp. 15-18 ◽  
Author(s):  
A. Balzarotti ◽  
M. Piacentini ◽  
M. Grandolfo
Keyword(s):  
Synchrotron Radiation ◽  
Spectral Distribution ◽  
Electron Synchrotron

scholarly journals Spectral Index Versus Frequency and Models for the Continua of AGN and QSOs

1989 ◽  
Vol 134 ◽  
pp. 201-202
Author(s):  
Wayne A. Stein
Keyword(s):  
Accretion Disk ◽  
Spectral Index ◽  
Power Law ◽  
Spectral Distribution ◽  
Secondary Electron ◽  
Low Frequency ◽  
Spectral Indices ◽  
Ultraviolet Continuum ◽  
Electron Synchrotron ◽  
X Ray

The observed spectral index as a function of frequency of QSO continua must be explained in models. It is generally increasing (F(ν) ∝ ν−α, α increasing) with higher frequency in the infrared (downward curvature). The visual to ultraviolet continuum has been shown to be a broken power law with F(ν) ∝ ν−0.5 at low frequency and a break to larger α at νo ∼ 3×1015 Hz. X-ray observations frequently exhibit a flat continuum with α < 1. One prominent example is 3C273 for which α1–3μm → 2, αvis ∼ 0.5 and αx ∼ 0.5. These spectral indices arise naturally in Secondary Electron Synchrotron Self-Compton (SESSC) models. Some accretion disk models approach these spectral indices for the visual-ultraviolet portion of the spectral distribution.

Calibration of the Spectral Radiance of a Low Current Carbon Arc between 185 nm and 340 nm

1978 ◽  
Vol 33 (4) ◽  
pp. 502-504 ◽  
Author(s):  
D. Einfeld ◽  
D. Stuck
Keyword(s):  
Synchrotron Radiation ◽  
Wavelength Range ◽  
Spectral Range ◽  
Spectral Radiance ◽  
Electron Synchrotron ◽  
Carbon Arc ◽  
Arc Current

The spectral radiance Lλ of a low current carbon arc (current 7.3 amps, voltage 65 V) has been calibrated in the spectral range from the air cut-off (λ ≈ 185 nm) to 340 nm with an uncertainty of ± 3% utilizing the electron synchrotron radiation of DESY, Hamburg. In the wavelength range above 260 nm these values differ by less than ± 6% from the measurements of Magdeburg and Schurer.

scholarly journals Fifty years since the first European synchrotron-radiation-derived XAFS spectrum (Frascati, 1963)

2013 ◽  
Vol 20 (5) ◽  
pp. 811-815 ◽  
Author(s):  
Annibale Mottana ◽  
Augusto Marcelli
Keyword(s):  
Synchrotron Radiation ◽  
Absorption Spectra ◽  
Electron Synchrotron ◽  
X Ray

The first absorption spectra recorded in Europe using synchrotron radiation as the X-ray source were theK-edge of Al and theLIII-edge of Cu taken at Frascati electron synchrotron in May 1963 by the French–Italian group comprised of Y. Cauchois, C. Bonnelle and G. Missoni.

Notizen: Comparison of Synchrotron Radiation and Hydrogen Continuum Radiation in the Near VUV by Means of a Deuterium Transfer Standard

1976 ◽  
Vol 31 (9) ◽  
pp. 1131-1132
Author(s):  
D. Einfeld ◽  
D. Stüde ◽  
K. Behringer ◽  
P. Thoma
Keyword(s):  
High Temperature ◽  
Synchrotron Radiation ◽  
Spectral Range ◽  
Indirect Comparison ◽  
Spectral Radiance ◽  
Electron Synchrotron ◽  
Continuum Radiation ◽  
Transfer Standard ◽  
Deuterium Lamp ◽  
The Continuum

Abstract The spectral radiance of a deuterium lamp has been calibrated by the radiation of an electron synchrotron and by the continuum radiation of a high temperature hydrogen arc. The two measurements allow an indirect comparison of the two radiometric standards in the spectral range from 175 to 340 nm. They agree with each other within less than ± 5%.

A monitor for the spectral distribution of white synchrotron radiation

1994 ◽  
Vol 81 (12) ◽  
pp. 551-552 ◽  
Author(s):  
D. Heimermann ◽  
Th. Beier ◽  
H. Dittmann ◽  
A. Hein ◽  
H. Mommsen ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Spectral Distribution
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