You searched on: Author: Charles Clark
Displaying records 1 to 10 of 220 records.
Resort by: Date / Title
1. Pioneering use of Synchrotron Radiation Research as a spectroscopic and metrological tool at NBS
Charles S Tarrio, Keith Codling, Ederer David, Uwe Arp, Charles W Clark, Thomas B Lucatorto
Interest in the use of Synchrotron Radiation (SR) as a source of continuum in the extreme ultraviolet (EUV) spectral region was stimulated by the 1956 Physical Review article by Diran Tomboulian and Paul Hartman of Cornell University. In their all-t ...
2. Noble Gas Excimer Scintillation Following Neutron Capture in Boron Thin Films
Alan K Thompson, Jacob McComb, Charles W Clark, Michael A. Coplan, Mohamad Al-Sheikhly, Robert Edward Vest
Far-ultraviolet (FUV) scintillation signals have been measured in heavy noble gases (argon, krypton, xenon) following boron-neutron capture (10B(n,α)7Li) in 10B thin films. The observed scintillation yields are comparable to the yields from some ...
3. Light-Wave Mixing in Quantum Gases
Lu Deng, Edward W Hagley, R Q. Wang, Charles W Clark
Ninety-five years after Einstein‰s theoretical prediction, we are surrounded in our daily lives
by its practical applications. For example, multi-channel telecommunication lasers and even the
commonly-used green laser pointers that cost just a fe ...
4. Overview of the TREC 2011 Web Track
Ian M Soboroff, Nick Craswell, Charles L. Clarke, Gordon Cormack
The TREC Web Track explores and evaluates Web retrieval technology over large collections of Web data.
In its current incarnation, the Web Track has been active for two years. For TREC 2010, the track
includes three tasks: 1) an adhoc retrieval t ...
5. SURF III: A flexible Synchrotron Radiation Source for Radiometry and Research
Uwe Arp, Charles W Clark, Lu Deng, Nadir S. Faradzhev, Alex P. Farrell, Mitchell L. Furst, Steven E Grantham, Edward W Hagley, Shannon Bradley Hill, Thomas B Lucatorto, Ping-Shine Shaw, Charles S Tarrio, Robert Edward Vest
The calculability of synchrotron radiation (SR) makes electron storage rings wonderful light sources for radiometry. The broadband nature of SR allows coverage of the whole spectral region from the x-ray to the far-infrared. Compact low-energy storag ...
6. A Special Functions Handbook for the Digital Age
Ronald F Boisvert, Charles W Clark, Daniel W Lozier, Frank William John Olver
The NIST Digital Library of Mathematical Functions (DLMF) is a reference work providing information on the properties of the special functions of applied mathematics. It is a successor to the highly successful NBS Handbook of Mathematical Functions ( ...
7. A Comparative Analysis of Cascade Measures for Novelty and Diversity
Ian M Soboroff, Charles L. Clarke, Nick Craswell, Azin Ashkan
Traditional editorial effectiveness measures, such as nDCG, remain standard for Web search evaluation. Unfortunately, these traditional measures can inappropriately reward re- dundant information and can fail to reflect the broad range of user needs ...
8. Far-ultraviolet signatures of the 3He(n,tp) reaction in noble gas mixtures
Patrick Hughes, Alan K Thompson, Michael Coplan, Robert Edward Vest, Charles W Clark
Previous work showed that the 3He(n,tp) reaction in a cell of 3He at atmospheric pressure generated tens of far-ultraviolet photons per reacted neutron. Here we report amplification of that signal by factors of 1000 and more when noble gases are adde ...
9. A Green Laser Pointer Hazard
Technical Note (NIST TN)
Jemellie Galang, Alessandro Restelli, Edward W Hagley, Charles W Clark
An inexpensive green laser pointer was found to emit 20 mW of infrared radiation during normal use. This is potentially a serious hazard that would not be noticed by most users of such pointers. We find that the problem derives from an unsafe desig ...
10. Ettore Majorana and the birth of autoionization
Charles W Clark, Ennio Arimondo, William C. Martin
In the early days of theoretical atomic spectroscopy, Ettore Majorana (1906-1938?) solved several
outstanding problems by developing the theory of autoionization. Later literature makes only
sporadic references to this accomplishment. Reviewing ...