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Search Publications by: Thomas B. Lucatorto (Assoc)

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Displaying 126 - 150 of 228

Precision Spectroscopy in He as a Test of QED

December 1, 1999
Author(s)
S Bergeson, A Balakrishnan, K G. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, Craig J. Sansonetti, J Wen, N Westbrook, C H. Cheng, E E. Eyler
High resolution laser-based measurements of energy levels have spurred the development and refinement of quantum electrodynamic calculations. We have extended very high resolution laser spectroscopy techniques into the vacuum ultraviolet wavelength region

NIST Programs for Calibrations in the Far Ultraviolet Spectral Region

November 1, 1999
Author(s)
Robert E. Vest, L R. Canfield, Mitchell L. Furst, R M. Graves, A D. Hamilton, L R. Hughey, Thomas B. Lucatorto, R P. Madden
The National Institute of Standards and Technology (NIST) serves the growing ultraviolet user community by providing calibration services throughout the spectral range from 2 nm to 400 nm. In this paper we describe the far ultraviolet transfer standard

Instrumental Aspects of X-Ray Microbeams in the Range Above 1 keV

April 1, 1999
Author(s)
P Dhez, P Chevallier, Thomas B. Lucatorto, Charles Tarrio
X rays were discovered by Roentgen in 1895, just over 100 years ago. Early investigations by Roentgen himself indicated that prisms, lenses, and mirrors were seemingly ineffective for deflecting and focusing x rays. However, the magical ability to look

Precision Spectroscopy in He as a Test of QED

January 1, 1999
Author(s)
S D. Bergeson, A Balakrishnan, G H. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, Craig J. Sansonetti, J Wen, N Westbrook, C H. Cheng, E E. Eyler

Ultraviolet Radiometry With Synchrotron Radiation and Cryogenic Radiometer

January 1, 1999
Author(s)
Ping-Shine Shaw, Keith R. Lykke, Thomas R. O'Brian, Arp Uwe, H H. White, Thomas B. Lucatorto, J L. Dehmer, Albert C. Parr, R Gupta
The combination of a cryogenic radiometer and synchrotron radiation enablesdetector scale realization in spectral regions that are otherwise difficult to access. Cryogenic radiometry is the most accurate primary detector-based standard available to date

Measurement of the He Ground State Lamb Shift Via the Two-Photon 1 1 S - 2 1 S transition

April 1, 1998
Author(s)
S Bergeson, A Balakrishnan, K G. Baldwin, Thomas B. Lucatorto, J P. Marangos, T J. McIlrath, Thomas R. O'Brian, S L. Rolston, J Wen, N Westbrook, C H. Cheng, E E. Eyler, Craig J. Sansonetti
We have extended two-photon Doppler-free spectroscopy to the vacuum ultraviolet spectral region to accurately measure the He 1 1S - 2 1S transition at 120 nm. Our result is 4 984 872 315[48] MHz. This yields a ground state Lamb shift of 41104[48] MHz, in