Messung der Oszillatorenstärken von SiI-, SiII-und SiIII-Linien im Wellenlangenbereich 1100 — 2600 Å und Vergleich des Vakuum-UV-Strahlungsnormals mit dem Kohlebogen

1969 ◽  
Vol 24 (6) ◽  
pp. 990-997
Author(s):  
W. Hofmann
Keyword(s):  
Light Source ◽  
Transition Probability ◽  
Wavelength Region ◽  
Calibration Method ◽  
Oscillator Strengths ◽  
Silicon Tetrafluoride ◽  
Full Agreement ◽  
Cascade Arc ◽  
Carbon Arc ◽  
Vacuum Uv

The oscillator strengths of 72 Si I-, Si II- and Si III-lines and multiplets in the wavelength region 1100 -2600 Å were measured in emission. The light source was a wall-stabilized arc burning in argon at atmopheric pressure into which small amounts of silicon tetrafluoride and fluorine were introduced. All oscillator strengths were measured relatively and then put on an absolute scale by using the value Anm = 1,64 · 108 sec-1 for the transition probability of the Si I-multiplet 2506 Å to 2528 Å. The vacuum-UV intensity calibration method using the central intensities of optically thick lines in the cascade arc was extended up to the wavelength 2516 Å. In this wavelength region it could be directly compared with the radiation of the anode crater of the carbon arc. Full agreement between these two intensity standards was found.

Messung der Absorptionsoszillatorenstärken von Ba-II Linien in den Spektralbereichen von 1400—2000 A und von 4100—4600 Å

1968 ◽  
Vol 23 (10) ◽  
pp. 1499-1507 ◽  
Author(s):  
Jürgen Von Specht
Keyword(s):  
Light Source ◽  
Particle Density ◽  
Transition Probability ◽  
Oscillator Strengths ◽  
Emission Lines ◽  
Cascade Arc ◽  
Carbon Arc

The oscillator strengths of 22 Ba-II emission lines were measured in the wavelength regions 1400—2000 Å and 4100—4600 A. The light source was a wall-stabilized cascade arc burning in argon, into which a small quantity of barium vapor was introduced. Standard intensities were produced by the central intensities of optically thick lines and by a carbon arc. The transition probability of the line Ba-II 4554 A, which is known with an accuracy of about 10%, was used to determine the particle density.

Messung der Absorptionsoszillatorenstärken von CI-Multipletts im Bereich zwischen 1100 und 1800 Å

1963 ◽  
Vol 18 (10) ◽  
pp. 1107-1116 ◽  
Author(s):  
G. Boldt
Keyword(s):  
Light Source ◽  
Transition Probability ◽  
Argon Plasma ◽  
Wavelength Region ◽  
Oscillator Strengths ◽  
Mixture Ratio ◽  
Cascade Arc

The absorption-oscillator-strengths of 24 C I-multiplets in the wavelength-region from 1100 to 1800 Å are measured in emission. The light-source for this purpose is a wall-stabilized cascade arc burning in an argon plasma into which a small quantity of carbondioxyd is introduced. Normalintensities are produced by the same source. The evaluation of particle-densities is carried out without supposing constancy of mixture ratio and knowledge of any transition-probability.

Messung der Absorptionsoszillatorenstärken von OI-Linien im Vakuum-UV-Spektralbereich

1967 ◽  
Vol 22 (10) ◽  
pp. 1613-1615 ◽  
Author(s):  
G. Boldt ◽  
F. Labuhn
Keyword(s):  
Light Source ◽  
Transition Probability ◽  
Argon Plasma ◽  
Oscillator Strengths ◽  
Mixture Ratio ◽  
Cascade Arc

The absorption oscillator strengths of the 0I-lines at 1152, 1218, 1302, 1305, and 1306 Å are measured in emission. The light source for this purpose is a wall-stabilized cascade arc burning in an argon plasma into which a small quantity of oxygen is introduced. Normal-intensities are produced by the same source. The evaluation of particle-densities is carried out without assuming constancy of mixture ratio and knowledge of any transition probability.

Messung der Absorptionsoszillatorenstärken von Cl I-Linien im Vakuum-UV-Bereich

1967 ◽  
Vol 22 (12) ◽  
pp. 2097-2101
Author(s):  
W. Hofmann
Keyword(s):  
Light Source ◽  
Atmospheric Pressure ◽  
Transition Probabilities ◽  
Particle Density ◽  
Wavelength Region ◽  
Oscillator Strengths ◽  
Arc Plasma ◽  
Cascade Arc

The absorption oscillator strengths of 10 Cl I-lines in the wavelength region 1100—1400 A were measured in emission. The light source was a wall-stabilized cascade arc burning in argon at atmospheric pressure. To measure the curve of growth, chlorine was introduced into the arc plasma in small, defined amounts. The central intensities of optically thick lines were used as intensity standards. The particle density was determined in two different ways, with identical results obtained. Both methods do not depend on the assumption of constancy of mixture ratios nor knowledge of any transition probabilities.

Messung der Absorptionsoszillatorenstärken von NI-Multipletts am Kaskadenlichtbogen im Wellenlängenbereich zwischen 1000 und 1800 Å

1965 ◽  
Vol 20 (8) ◽  
pp. 998-1010 ◽  
Author(s):  
Franz Labuhn
Keyword(s):  
Light Source ◽  
Transition Probability ◽  
Oscillator Strengths ◽  
Mixture Ratio ◽  
Cascade Arc

The absorption oscillator strengths of 35 NI-multiplets between 1000 and 1800 A are measured in emission. The light source is a wall-stabilized cascade arc burning in definite argon-nitrogen mixtures. Normal-intensities are produced by the same source. The evaluation of particle densities is carried out without assuming constancy of mixture ratio and knowledge of any transition probability.

Messung der Absorptionsoszillatorenstärken von SI- und S II-Linien im Bereich zwischen 1100 und 2000 Å

1968 ◽  
Vol 23 (11) ◽  
pp. 1707-1716
Author(s):  
Dragutin Müller
Keyword(s):  
Light Source ◽  
Transition Probability ◽  
Oscillator Strengths ◽  
Mixture Ratio

The absorption oscillator strengths of 44 S I- and 9 S II-lines between 1100 and 2000 Å are measured in emission. The light source is a wall-stabilized arc burning in definite argon-SF6 mixtures. Normal-intensities are produced by the same source. The evaluation of particle densities is carried out without assuming constancy of mixture ratio and knowledge of any transition probability.

A Discussion on astronomy in the ultraviolet - Preliminary results of absolute u.v. rocket photometry of γ Ori

1975 ◽  
Vol 279 (1289) ◽  
pp. 457-457
Keyword(s):  
Light Source ◽  
Wavelength Region ◽  
Black Body ◽  
Black Body Radiation ◽  
Cascade Arc ◽  
Preliminary Results ◽  
Cassegrain Telescope ◽  
Blackbody Calibration

In autumn 1973 the star y Ori (B2 m, mv — 1.64, HD 35468) was measured with two rocketborne photometers in the wavelength region from 1100 to 3000 A. The bandwidth was 100 and 200 A respectively. The photometers were calibrated with black-body radiation. The photometers, developed by the late G. Boldt and co-workers, had collecting mirrors of 22 cm diam. Three e.m.r.-photomultipliers recorded the light dispersed by a stepwise moved grating. Three channels with partly overlapping wavelength regions were thus defined. During flight, up to 11 continuously repeated measuring cycles had been recorded via telemetry. Those free from absorption and night-glow influences were taken for evaluation. Each instrument had been calibrated twice before launch inside vacuum calibration equipment. An active blackbody calibration was used (Boldt 1968, 1970) with an argon cascade arc as light source that had been doted with additional gases to produce optically thick lines. The light was dispersed by a McPherson monochromator and an inverted Cassegrain telescope produced a beam of parallel light of 30 cm diameter.

scholarly journals Development of 146nm Vacuum UV Light Source

2012 ◽  
Vol 32 ◽  
pp. 477-481 ◽  
Author(s):  
Bu Ren’an ◽  
Song Mingdong ◽  
Wang Zhongrui ◽  
Jin Jing ◽  
Hu Wenbo ◽  
...  
Keyword(s):  
Light Source ◽  
Uv Light ◽  
Vacuum Uv
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