High-Resolution Reflection Spectra of Alkali Halides in the Far Ultraviolet

1973 ◽  
Vol 7 (4) ◽  
pp. 1541-1549 ◽  
Author(s):  
M. Antinori ◽  
A. Balzarotti ◽  
M. Piacentini
Keyword(s):  
High Resolution ◽  
Alkali Halides ◽  
Reflection Spectra ◽  
Far Ultraviolet

High-resolution far ultraviolet emission spectra of electron-excited molecular deuterium

1999 ◽  
Vol 32 (15) ◽  
pp. 3813-3838 ◽  
Author(s):  
H Abgrall ◽  
E Roueff ◽  
Xianming Liu ◽  
D E Shemansky ◽  
G K James
Keyword(s):  
High Resolution ◽  
Emission Spectra ◽  
Ultraviolet Emission ◽  
Far Ultraviolet

High-resolution, far-ultraviolet study of Beta Draconis (G2 Ib-II) - Transition region structure and energy balance

1984 ◽  
Vol 283 ◽  
pp. 731 ◽  
Author(s):  
A. Brown ◽  
C. Jordan ◽  
R. E. Stencel ◽  
J. L. Linsky ◽  
T. R. Ayres
Keyword(s):  
Energy Balance ◽  
High Resolution ◽  
Transition Region ◽  
Far Ultraviolet

High-Resolution Electron-Impact Study of the Far-Ultraviolet Emission Spectrum of Molecular Hydrogen

1995 ◽  
Vol 101 ◽  
pp. 375 ◽  
Author(s):  
Xianming Liu ◽  
Syed M. Ahmed ◽  
Rosalie A. Multari ◽  
Geoffrey K. James ◽  
Joseph M. Ajello
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Electron Impact ◽  
Molecular Hydrogen ◽  
Impact Study ◽  
Ultraviolet Emission ◽  
Resolution Electron ◽  
Far Ultraviolet

scholarly journals IUE Ultraviolet Spectra of the Interacting Binary U Cephei

1980 ◽  
Vol 88 ◽  
pp. 237-241
Author(s):  
Yoji Kondo ◽  
George E. McCluskey ◽  
Robert E. Stencel
Keyword(s):  
High Resolution ◽  
Ultraviolet Light ◽  
Stellar Evolution ◽  
Binary Systems ◽  
Light Curves ◽  
Close Binary ◽  
Eclipsing Binary ◽  
Ultraviolet Spectra ◽  
International Ultraviolet Explorer ◽  
Far Ultraviolet

The eclipsing binary U Cephei has proven to be of great interest in the study of stellar evolution in close binary systems. Batten (1974), Hall and Walter (1974), Rhombs and Fix (1976), Markworth (1977), and Olson (1978), among others, have recently reported on their intensive ground based studies of U Cephei. Kondo, McCluskey and Wu (1978) have investigated the ultraviolet light curves of U Cephei obtained with Astronomical Netherlands Satellite (ANS). Kondo, McCluskey and Stencel (1979) have discussed the International Ultraviolet Explorer (IUE) spectra of U Cephei. This paper discusses results incorporating additional IUE high resolution spectra of U Cephei obtained in both far-ultraviolet and mid-ultraviolet spectral regions.

scholarly journals The Proposed Columbus Mission: High and Low Resolution Spectroscopy in the 100–2000 Å Spectral Region

1984 ◽  
Vol 86 ◽  
pp. 72-75
Author(s):  
Jeffrey L. Linsky
Keyword(s):  
High Resolution ◽  
Spectral Range ◽  
Spectral Region ◽  
Extreme Ultraviolet ◽  
High Spectral Resolution ◽  
Low Resolution ◽  
Interstellar Gas ◽  
Scientists And Engineers ◽  
Ionization Balance ◽  
Far Ultraviolet

For the past year a Joint Working Group of NASA and ESA scientists and engineers has been defining the scientific objectives and instrument parameters for a proposed satellite to obtain far and extreme ultraviolet spectra of stars, interstellar gas, solar system objects, and galaxies. The project, now called Columbus, incorporates the scientific goals of the previously proposed NASA Far Ultraviolet Spectrograph Explorer (FUSE) and ESA Magellan missions.The prime spectral range of Columbus, 900–1200 Å, cannot be observed by IUE or Space Telescope. In this spectral range Copernicus was able to observe bright stars (mv ≤ 6) with high resolution and the Hopkins Ultraviolet Telescope (HUT) will observe faint sources at low resolution, but Columbus will be the first instrument capable of high spectral resolution observations of faint sources (mv ≈ 17). High resolution spectra in the 900–1200 Å region will permit studies of the Lyman lines of atomic H and D, the molecules H2 and HD, resonance lines of C III and O VI, and other species listed in Table 1. Columbus also is being designed to observe the 1200–2000 Å spectral region at high resolution, permitting measurements of many stages of ionization for the same atom (i.e. N I, II, III, V; C II, III, IV; and S II, III, IV, VI). The broad coverage of ionization states is essential for the analysis of interstellar and stellar plasmas where the ionization balance can be quite complex.

Optical properties and quantum efficiency of thin-film alkali halides in the far ultraviolet

2002 ◽  
Vol 41 (13) ◽  
pp. 2532 ◽  
Author(s):  
Juan I. Larruquert ◽  
José A. Méndez ◽  
José A. Aznárez ◽  
Anton S. Tremsin ◽  
Oswald H. W. Siegmund
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Quantum Efficiency ◽  
Alkali Halides ◽  
Far Ultraviolet

Photoemission Measurements Of Photocathode Materials In The 115–400 Å Range

1993 ◽  
Vol 306 ◽  
Author(s):  
S. Grantham ◽  
M.C. Richardson ◽  
R. Watts ◽  
T. Lucatorto ◽  
C. Tarrio ◽  
...  
Keyword(s):  
High Resolution ◽  
Ultraviolet Radiation ◽  
Water Absorption ◽  
Spectral Range ◽  
Storage Time ◽  
Prolonged Exposure ◽  
Alkali Halides ◽  
X Ray ◽  
Hygroscopic Nature ◽  
Similar Materials

AbstractWith the intent of finding a sensitive photocathode material in the 130 Å (100eV) X-ray range for use in a high resolution soft X-ray Conversion Microscope, photoelectron yields of several materials (mostly alkali halides), were measured at the National Institute of Standards and Technology's (NIST) Synchrotron Ultraviolet Radiation Facility II (SURF II). These measurements were made as a function of wavelength in the spectral range 115 Å-400 Å. The measured values are comparable to previous measurements of the photoelectron yields of these and similar materials, and to an existing model of photoemission [1–3]. We also determined the effects of prolonged exposure to X-ray light on performance. Moreover, because of the hygroscopic nature of Alkali Iodides, measurements of the photoelectron yield versus wavelength were repeated for samples of CsI that were kept in storage for periods of time to determine the effects of storage time and water absorption on the photoelectron yield.

scholarly journals The Distribution of Oxygen, Calcium, and Strontium Over the Surface of 21 Com

2021 ◽  
Vol 5 (11) ◽  
pp. 270
Author(s):  
Richard Monier
Keyword(s):  
High Resolution ◽  
Quantitative Information ◽  
High Signal ◽  
Rotational Period ◽  
Signal To Noise ◽  
Far Ultraviolet ◽  
Abundance And Distribution

Abstract Comparison of optical high resolution high signal-to-noise ELODIE spectra of 21 Com taken in 2004 April and separated by about half of the 2 days rotational period, reveals variations of the oxygen, calcium and strontium lines between rotational phases 0.94 and 0.48. Whereas the lines of oxygen and calcium are stronger at phase 0.94, those of strontium strengthen at phase 0.48. The synthesis of strong Sr ii lines yields disk-averaged estimates of the abundances of strontium: about 200 times solar at phase 0.94 and 450 solar at phase 0.48 for strontium. However the O i and Ca ii lines are too blended to derive unambiguous quantitative information on the abundance and distribution of oxygen and calcium over the surface of 21 Com. The likely underabundance of oxygen might be quantified using stronger far-ultraviolet transitions.

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