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Author: kevin coakley
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1. A gamma and X-ray dector for cryogenic, high magnetic field applications
Published: 7/13/2012
Authors: Thomas R Gentile, R L Cooper, R. Alarcon, M J Bales, E J Beise, H Breuer, J. Byrne, T E. Chupp, Kevin J Coakley, Maynard S Dewey, Changbo Fu, Hans P Mumm, Jeffrey S Nico, Brian O'Neill, K. Pulliam, Alan K Thompson, F E. Wietfeldt
Abstract: As part of an experiment to measure the spectrum of photons emitted in beta-decay of the free neu- tron, we developed and operated a detector consisting of 12 bismuth germanate (BGO) crystals coupled to avalanche photodiodes (APDs). The detector wa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911584

2. Fast Neutron Detection with Li-6-loaded Liquid Scintillator
Published: 4/12/2011
Authors: David McLarty Gilliam, B Fisher, J N Abdurashitov, Kevin J Coakley, V N Gavrin, Jeffrey S Nico, A A Shikhin, Alan K Thompson, Dominic Frank Vecchia, V E Yants
Abstract: We report on the development of a fast neutron detector using a liquid scintillator doped with enriched 6Li. The lithium was introduced in the form of an aqueous LiCl micro-emulsion with a di-isopropylnaphthalene based liquid scintillator. A 6Li conc ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907289

3. Recent Progress in Noise Thermometry at 505 K and 693 K Using Quantized Voltage Noise Ratio Spectra
Published: 9/6/2010
Authors: Weston Leo Tew, Paul David Dresselhaus, Kevin J Coakley, H Rogalla, D. R White, J Labenski
Abstract: We report on technical advances and new results in noise thermometry at temperatures near the tin freezing point and the zinc freezing point using a Quantized Voltage Noise Source (QVNS). The temperatures are derived in a series of separate measureme ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905427

4. Erratum: Scintillation time dependence and pulse shape discrimination in liquid argon
Published: 3/2/2010
Authors: W. H. Lippincott, Kevin J Coakley, D. Gastler, A. Hime, E. Kearns, D. N. McKinsey, J. A. Nikkel, L.C. Stonehill
Abstract: We have found an error in the code used to perform the multibin method analysis of Sec. III C in which events were compared to a template trace calculated from the wrong photoelectron bin (the index l in Eqs. (14) and (15) did not match the observed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905690

5. Scintillation time dependence and pulse shape discrimination in liquid argon
Published: 3/2/2010
Authors: W. H. Lippincott, Kevin J Coakley, D. Gastler, A. Hime, E. Kearns, D. N. McKinsey, J. A. Nikkel, L. C. Stonehill
Abstract: Using a single-phase liquid argon detector with a signal yield of 4.85 photoelectrons per keV of electronic-equivalent recoil energy (keVee), we measure the scintillation time dependence of both electronic and nuclear recoils in liquid argon down to ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150656

6. An experiment for the precision measurement of the radiative decay mode of the neutron
Published: 10/5/2009
Authors: R Cooper, Christopher D. Bass, E Beise, H Breuer, J Byrne, T E. Chupp, Kevin J Coakley, Maynard S Dewey, B Fisher, Changbo Fu, Thomas R Gentile, M. McGonagle, Hans P Mumm, Jeffrey S Nico, Alan K Thompson, F E. Wietfeldt
Abstract: The neutron typically beta decays into a proton, electron, and antineutrino. In some decays, it can be accompanied by a high energy photon. We recently performed the rst observation of the radiative beta decay branch for the free neutron with phot ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842579

7. 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

8. Pulse Shape Discrimination for a Fast Neutron Detector
Published: 2/9/2009
Authors: Kevin J Coakley, Dominic Frank 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

9. 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

10. Statistical Learning Methods for Neutron Transmission Tomography of Fuel Cells
Published: 7/8/2008
Authors: Kevin J Coakley, Dominic Frank 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