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Displaying 151 - 175 of 251

The Bismuth Abundance in the HgMn Stars chi) Lupi and HR7775 and Improved Atomic Data for Selected Transitions of Bi I, Bi II, and Bi III

April 1, 2001
Author(s)
G Wahlgren, T Brage, J C. Brandt, J Fleming, S Johansson, D S. Leckrone, C R. Proffitt, Joseph Reader, Craig J. Sansonetti
High resolution spectra of the chemically peculiar HgMn type stars Χ Lupi and HR7775 obtained with the Hubble Space Telescope/Goddard High Resolution Spectrograph are investigated for their abundance of bismuth. HR7775, previously known from International

Spectrum and Energy Levels of Singly-Ionized Mercury (Hg II)

March 1, 2001
Author(s)
Craig J. Sansonetti, Joseph Reader
The spectrum of singly-ionized mercury (Hg II) has been observed from 500 to 9880 with sliding sparks and pulsed-RF discharges on 10.7-m grating spectrographs in vacuum and air. About 500 lines have been classified as transitions between 114 energy levels

Infrared Spectra of Ne, Kr, and Xe

January 1, 2001
Author(s)
Craig J. Sansonetti, M M. Blackwell, Edward B. Saloman
New observations of the spectra of neutral Ne, Kr, and Xe in the region 0.7 to 5.0 m with the 2-m NIST FTS provide precise new wavelengths and resolve questions concerning lines that were previously multiply classified.

Image Plates for Registration of Far-Ultraviolet Spectra

February 1, 2000
Author(s)
Joseph Reader, Craig J. Sansonetti, R Deslattes
We have tested an autoradiographic photostimulable phosphor image storage plate as a medium for recording spectra in the wavelength region from 50 to 550 and have compared the results with spectra obtained using conventional photographic emulsions. The
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