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Search Publications by: Joseph Reader (Assoc)

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Displaying 76 - 100 of 136

NIST Databases on Atomic Spectra

December 1, 2001
Author(s)
Daniel E. Kelleher, William C. Martin, Wolfgang L. Wiese, Jeffrey R. Fuhr, Arlene Musgrove, Karen J. Olsen, Peter J. Mohr, Joseph Reader, Jean E. Sansonetti, Larissa Podobedova
A summary of the contents and features of the National Institute of Standards and TEchnology (NIST) Atomic Spectra Database (ASD) and other published and upcoming compilations and databases from NIST is presented.

Radiometry of Low-Pressure Hg-Ar Discharges

August 1, 2001
Author(s)
Craig J. Sansonetti, Joseph Reader
New fluorescent lamp designs employ Hg-Ar discharges under operating conditions that differ significantly from those found in conventional fluorescent tubes. We have studied the radiant output of Hg-Ar discharges over a wide range of Ar pressure, Hg vapor

Atomic Spectroscopy at NIST 2001

June 1, 2001
Author(s)
Joseph Reader
The program in atomic spectroscopy at NIST continues to provide accurate reference data on spectral lines and energy levels for a wide variety of important applications. With spectrometers at NIST that can record spectra from the extreme ultraviolet (1 nm)

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

Spectral Data for Atoms and Ions

November 1, 2000
Author(s)
Joseph Reader
Progress continues on the development of databases for spectral properties of atoms and ions. Version 2.0 of the NIST Atomic Spectra Database (ASD) became available on the World Wide Web in March 1999. This version contains data for many maore spectra than