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Displaying 101 - 125 of 251

Systematic Observations of 150 W Metal-Halide Arc Lamps Containing a Progression of Additive Chemistries

July 1, 2004

Author(s)

John J. Curry, Craig J. Sansonetti

With three complimentary diagnostic methods, we examined a series of 150 W metal-halide arc lamps containing a progression of additive chemistries: 1) pure Hg, 2) Hg + HgI2, 3) Hg + NaI, and 4) Hg + NaI + DyI3. We obtained spatial distributions of Hg using

Spectral Characterization of HST Calibration Lamps - New Pt/Ct-Ne Line Catalogues and Ageing Test

June 25, 2004

Author(s)

F Kerber, Michael R. Rosa, Craig J. Sansonetti, Joseph Reader, Gillian Nave, P Bristow, M Fiorentio, G Lercher

The Space Telescope European Coordinating Facility's (ST-ECF) lamp project, funded directly by the European Space Agency (ESA), is dedicated to the study of hollow cathode calibration lamps as they are used onboard the Hubble Space Telescope (HST). There

High Resolution Observations of the Infrared Spectrum of Neutral Neon

January 1, 2004

Author(s)

Craig J. Sansonetti, M M. Blackwell, Edward B. Saloman

Investigation of Single-Factor Calibration of the Wave-Number Scale in Fourier-Transform Spectroscopy

January 1, 2004

Author(s)

J L. Salit, Craig J. Sansonetti, D Veza, J C. Travis

Reference Wavelengths in the Spectra of Fe, Ge, and Pt in the Region Near 1935 {?}

January 1, 2004

Author(s)

Gillian Nave, Craig J. Sansonetti

Spectral Characterization of HST Calibration Lamps ?} New Pt/Cr-Ne Line Catalogues and Ageing Test, ed. by G. Hasinger and M.J. Turner

January 1, 2004

Author(s)

F Kerber, Michael R. Rosa, Craig J. Sansonetti, Joseph Reader, Gillian Nave, M Bristow, M Fiorention, G Lercher

Precision Wavelength Metrology with a Fourier Transform Spectrometer

June 1, 2003

Author(s)

D. Veza, Marc L. Salit, John C. Travis, Craig J. Sansonetti

We have investigated the intrinsic accuracy of the optical frequency scale in spectra acquired by a Fourier Transform Spectrometer (FTS). The uncalibrated accuracy of the FTS optical frequency axis is about 1 part in 10 5. This uncertainty can be reduced

Foreign Gas Pressure Broadening and Shifts of the 2S-4S Two-Photon Transition in Lithium

May 1, 2003

Author(s)

W DeGraffenreid, S C. Campbell, Craig J. Sansonetti

We have observed broadening and shift of the 2S-4S Doppler-free two-photon transition of atomic Li by collisions with neon and argon buffer gases in a heat-pipe oven. Measured broadening and shift rates are presented and compared with theoretical

STIS Calibration Enhancement - Spectral Characterisation of Pt/Cr-Ne Hollow Cathode Lamps

March 1, 2003

Author(s)

F Kerber, Michael R. Rosa, Craig J. Sansonetti, Joseph Reader

STIS Calibration Enhancement - Spectral Characterization of PT/CR-NE Hollow Cathode Lamps

March 1, 2003

Author(s)

F Kerber, Michael R. Rosa, Craig J. Sansonetti, Joseph Reader

Wavelength calibration for the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope is provided by an onboard Pt/Cr-Ne hollow cathode lamp. The Space Telescope-European Coordinating Facility (ST-ECF) is currently conducting a project

2 2 S 1/2 -4 2 S 1/2 Transition of Atomic Lithium by Doppler-Free Two-Photon Spectroscopy

January 1, 2003

Author(s)

W DeGraffenreid, Craig J. Sansonetti

We are performing an experiment to measure the lithium 3 2S - 2 2S transition isotope shift that will reduce the current uncertainty by an order of magnitude. Results and comparison to theory will be presented.

2 2 S 1/2 Transition of Atomic Lithium by Doppler-Free Two-Photon Spectroscopy

January 1, 2003

Author(s)

W DeGraffenreid, Craig J. Sansonetti

We have investigated the 2 2S1/2 - 4 2S1/2 two-photon transition in atomic lithium by high resolution laser spectroscopy. The frequencies of the two-photon resonances have been measured with an accuracy of better than 1 MHz using our Fabry-Perot wavemeter

2 S-2(1/2)-4 S-2(1/2) Transition of Atomic Lithium by Doppler-Free Photon Spectroscopy

January 1, 2003

Author(s)

W DeGraffenreid, Craig J. Sansonetti

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