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You searched on: Author: kevin coakley

Displaying records 21 to 30 of 62 records.
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21. Prospects for a New Cold Neutron Beam Measurement of the Neutron Lifetime
Published: 10/5/2009
Authors: Maynard S Dewey, Kevin J Coakley, David McLarty Gilliam, G. Greene, A. Laptev, Jeffrey S Nico, W M. Snow, F. E Wiefeldt, A. Yue
Abstract: In the most accurate cold neutron beam determination of the neutron lifetime based on the absolute counting of decay protons, the largest uncertainty was attributed to the absolute determination of the capture flux of the cold neutron beam. Currentl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842578

22. Pulse Shape Discrimination for a Fast Neutron Detector
Published: 2/9/2009
Authors: Kevin J Coakley, Dominic F. (Dominic F.) Vecchia, Jeffrey S Nico, B Fisher
Abstract: We are developing a detector that uses liquid scintillator loaded with Li-6 for the efficient measurement of fast neutrons and their energy. Such a detector would have both scientific applications such as quantification of neutron energy spectra in u ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900208

23. Radiative Beta Decay of the Free Neutron
Published: 2/2/2009
Authors: R L Cooper, T E. Chupp, Maynard S Dewey, Thomas R Gentile, Hans P Mumm, Jeffrey S Nico, Alan K Thompson, B M Fisher, I Kremsky, F E. Wietfeldt, E J Beise, H Breuer, K G Kiriluk, J Bryne, Kevin J Coakley, Changbo Fu
Abstract: The theory of quantum electrodynamics predicts that the beta decay of the neutron into a proton, electron, and antineutrino is accompanied by a continuous spectrum of emitted photons described as inner bremsstrahlung. While this phenomenon has been ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903836

24. Statistical Learning Methods for Neutron Transmission Tomography of Fuel Cells
Published: 7/8/2008
Authors: Kevin J Coakley, Dominic F. (Dominic F.) Vecchia, Daniel S Hussey
Abstract: In a fuel cell, water is formed as a by-product of the reaction between hydrogen and oxygen. As a neutron beam passes through a fuel cell, it can undergo s-wave scattering. For the dry and wet states of a fuel cell, there are spatially varying neutro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150466

25. Development of the Aerosol Particle Mass Analyzer
Published: 10/17/2007
Authors: Nobuhiko Fukushima, Naoko Tajima, Kensei Ehara, Hiromu Sakurai, Kevin J Coakley
Abstract: The Aerosol Particle Mass Analyzer (APM), can classify particles according to their mass-to-charge ratio. The utility of the APM has been confirmed; the APM has been applied to atmospheric aerosol research and engine exhaust measurements. The operati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150628

26. Analysis of uncertainty in particle mass measurement using an aerosol particle mass analyzer
Published: 9/9/2007
Authors: Kensei Ehara, Hiromu Sakurai, Akira Yabe, Naoko Tajima, Kevin J Coakley
Abstract: The aerosol particle mass analyzer (APM) classifies aerosol particles according to their mass-to-charge ratio (Ehara et al., 1996). Particle mass can be measured by use of the APM in combination with a condensation particle counter. Being a balance m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150510

27. Optimal Ion Trapping Experiment
Published: 5/10/2007
Author: Kevin J Coakley
Abstract: In each run of an experiment, ions are confined in a trap for duration {\tau}. After the trapping stage, ions are purged and detected. The detector provides incomplete information because it goes dead after detecting the first trapped ion. There is a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150417

28. Feasibility of Coded Source Neutron Transmission Tomography
Published: 1/1/2007
Authors: Kevin J Coakley, Daniel S Hussey
Abstract: In a simulation experiment, we study the feasibility of coded source neutron transmission tomography for imaging water density in fuel cells at the NIST neutron imaging facility. In standard two-dimensional transmission tomography, one reconstructs a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150523

29. Stochastic Modeling and Estimation in a Neutron Lifetime Experiment
Published: 1/1/2007
Authors: Yang G. L., Kevin J Coakley
Abstract: A team of researchers demonstrated at the National Institute of Standards and Technology Cold Neutron Research Facility for the first time that ultra cold neutrons can be confined in a magnetic trap filled with liquid helium. This technical breakthro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150287

30. Observation of the Radiative Decay Mode of the Free Neutron
Published: 12/29/2006
Authors: Jeffrey S Nico, Maynard S Dewey, Thomas R Gentile, Hans P Mumm, Alan K Thompson, B Fisher, I Kremsky, Fred Eberhardt Wietfeldt, T E Chupp, R Cooper, E Beise, K G Kiriluk, J Byrne, Kevin J Coakley
Abstract: The theory of quantum electrodynamics predicts that beta decay of the neutron into a proton, electron, and antineutrino should be accompanied by a continuous spectrum of soft photons. While this inner bremsstrahlung branch has been previously measure ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=841194



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