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Publications

Peer-reviewed journal publications

  • Z. Liu, S. Chatzidakis, J.M. Scaglione, C. Liao, H. Yang, J.P. Hayward, “Muon Tracing and Image Reconstruction Algorithms for Cosmic Ray Muon Computed Tomography,” IEEE Transactions in Image Processing, Vol. 28, 2019, 426-435, Available: https://doi.org/10.1109/TIP.2018.2869667.
  • M.C. Tweardy, S. McConchie, J.P. Hayward, “Quantifying the determinants of leakage multiplication for large uranium objects using Monte Carlo simulations,” Nuclear Instruments and Methods in Physics Research A,2018, Available: https://doi.org/10.1016/j.nima.2018.11.143.
  • M.E. Moore, J. Lousteau, P. Trtik, H.Z. Bilheux, D. Pugliese, D. Milanese, A.T. Simone, G. Brambilla, J.P. Hayward, “Fabrication and experimental evaluation of microstructured 6Li silicate fiber arrays for high spatial resolution neutron imaging,” Nuclear Instruments and Methods in Physics Research A,2018, Available: https://doi.org/10.1016/j.nima.2018.12.010.
  • A.T. Simone, S. Croft, J.P. Hayward, L.G. Worrall, “Using the JCC-71 neutron coincidence collar as a benchmark for detector characterization with PTR-32 list mode data acquisition,” Nuclear Instruments and Methods in Physics Research A,2018, Available: https://doi.org/10.1016/j.nima.2018.08.022.
  • A.T. Simone, S. Croft, C. Britton, R.D. McElroy, J.P. Hayward, “Investigating the Non-Ideal Behavior of the Amptek A111 Charge Sensitive Preamplifier and Discriminator Board-3He Proportional Counter Combination Used in Common Safeguards Neutron Coincidence Counters,” Nuclear Instruments and Methods in Physics Research A,2018, Available: https://doi.org/10.1016/j.nima.2018.10.033.
  • C. Redding, A. Hackett, M. Laubach, R. Feng, P. Feng, C. Hurlbut, P. Liaw, J.P. Hayward, “Tensile, flexural, and light output measurements of selected organic scintillators for evaluation of their potential as structural materials,” Nuclear Instruments and Methods in Physics Research A,2018, Available: https://doi.org/10.1016/j.nima.2018.10.126.
  • C. Liao, H. Yang, Z. Liu, J.P. Hayward, “Design and Characterization of a Scintillator-Based Position-Sensitive Detector for Muon Imaging,” Nuclear Technology, 2018, Available: https://doi.org/10.1080/00295450.2018.1522885.
  • M.E. Moore, H. Xue, P. Vilmercati, S.J. Zinkle, N. Mannella, J.P. Hayward, “Thermal diffusion of mixed valence Ce in 6Li loaded silicate glass for neutron imaging,” Journal of Non-Crystalline Solids, Vol. 498, Oct. 2018, 145-152, Available: https://doi.org/10.1016/j.jnoncrysol.2018.06.004
  • A.L. Lousteau, R.D. McElroy, S. Croft, J.P. Hayward, “Determining 235U enrichment in bulk uranium items using dual-energy interrogation with delayed neutron measurement,” Nuclear Instruments and Methods in Physics Research A, Vol. 904, Oct. 2018, pp. 74-80.  Available: https://doi.org/10.1016/j.nima.2018.07.030
  • S.B. Donnald, R. Williams, C.L. Melcher, F. Meng, M. Koschan, S. Friedrich, J.A. Johnson, J.P. Hayward, “Correlation of Nonproportionality and Scintillation Properties with Cerium Concentration in YAlO3:Ce,” IEEE Transactions on Nuclear Science, Vol. 65, No. 5, May 2018, Available: http://dx.doi.org/10.1109/TNS.2018.2828428
  • S. Chatzidakis, Z. Liu, J.P. Hayward, J.M. Scaglione, “A generalized trajectory estimation algorithm with energy loss for application to muon tomography,” Journal of Applied Physics, Vol. 123, 124903, published online Mar 2018, Available: https://doi.org/10.1063/1.5024671
  • J.P. Hayward, J. Sparger, L. Fabris, R.J. Newby, “Fast neutron counting in a mobile, trailer-based search platform,” EPJ Nuclear Sci. Technol., Vol. 3, 35, published online Dec. 2017. Available: http://dx.doi.org/10.1051/epjn/2017028.
  • M.C. Tweardy, S. McConchie, J.P. Hayward, “A Point Kinetics Model for Estimating Neutron Multiplication of Bare Uranium Metal in Tagged Neutron Interrogation,” IEEE Transactions on Nuclear Science, Vol. 64, No. 7, July 2017. Available: http://dx.doi.org/10.1109/TNS.2017.2715238.
  • B. Ayaz-Maierhafer, C.G. Britt, A.J. August, H. Qi, C.E. Seifert, J.P. Hayward, “Design Optimization for a Wearable, Gamma-Ray and Neutron Sensitive, Detector Array with Directionality Estimation,” Nuclear Instruments and Methods in Physics Research A,  870, 131-139.  Available: https://doi.org/10.1016/j.nima.2017.07.020
  • A.T. Simone, S. Croft, R.D. McElroy, L. Sun, J.L. Lacy, A. Athanasiades, J.P. Hayward, “Performance of a Boron-Coated-Straw- Based HLNCC for International Safeguards Applications,” IEEE Transactions on Nuclear Science, 64 (2017), 2690-2697. Available: http://dx.doi.org/10.1109/TNS.2017.2742986
  • Simone, A. T., Croft, S., Favalli, A., & Hayward, J. P., “A Comparison of Approaches to Determine Dead Time Parameters Using a Boron- Coated-Straw High-Level Neutron Coincidence Counter,” ESARDA Bulletin, 54 (2017) 6-13. Available from https://esarda.jrc.ec.europa.eu/
  • Z. Liu, J.P. Hayward, C. Liao, H. Yang, “Detection of Missing Assemblies and Estimation of the Scattering Densities in a VSC-24 Dry Storage Cask with Cosmic-Ray-Muon-Based Computed Tomography,” Journal of the Institute of Nuclear Materials Management, XLV (2017), 12-20.  Available from https://www.inmm.org/Members
  • J. Zhang, M.E. Moore, Z. Wang, Zhou Rong, C. Yang, J.P. Hayward, “Study of sampling rate influence on neutron-gamma discrimination with stilbene coupled to a silicon photomultiplier,” Applied Radiation and Isotopes, Vol. 128, Oct. 2017, p. 120-124. Available: http://dx.doi.org/10.1016/j.apradiso.2017.06.036
  • X. Zhang, M.E. Moore, K.M. Lee, E.D. Lukosi, J.P. Hayward, “Study of cerium diffusion in undoped lithium-6 enriched glass with Rutherford backscattering spectrometry,” Nuclear Instruments and Methods in Physics Research B, Vol. 378, July 2016, p. 8-11. Available: http://dx.doi.org/10.1016/j.nimb.2016.04.036
  • Y. Song, J. Conner, X. Zhang, J.P. Hayward, “Monte Carlo simulation of a very high resolution thermal neutron detector composed of glass scintillation microfibers,” Applied Radiation and Isotopes, Vol. 108, 2016, p. 100-107.  Available: http://dx.doi.org/10.1016/j.apradiso.2015.12.035.
  • A. Iyengar, M. Beach, R.J. Newby, L. Fabris, L.H. Heilbronn, J.P. Hayward, “Systematic Measurement of Fast Neutron Background Fluctuations in an Urban Area Using a Mobile Detection System,” Nuclear Instruments and Methods in Physics Research A, Vol. 773, 2015, p. 27-32.  Available: http://dx.doi.org/10.1016/j. nima.2014.10.045
  • B. Ayaz-Maierhafer, M.A. Laubach, J.P. Hayward, “Sensing of Cf-252 Fission Gamma Rays Using Same-Size Glass Detectors,” Journal of Radioanalytical and Nuclear Chemistry, Nov. 2015. Available: http://dx.doi.org/10.1007/s10967-015-4584-5.
  • X. Zhang, B. Ayaz-Maierhafer, M.A. Laubach, J.P. Hayward, “Observation of Material, Thickness, and Bremsstrahlung X-ray Intensity Dependent Effects in Moderate and High Z Targets in a Gamma and X-Ray LIDAR Experiment,” Nuclear Instruments and Methods in Physics Research A, vol. 784, June 2015, p. 621-624. Available: http://dx.doi.org/10.1016/j.nima.2014.12.076
  • K.P. Ziock, C.B. Boehnen, J.M. Ernst, L. Fabris, J. Hayward, T.P. Karnowski, V.C. Paquita, D.R. Patlolla, D.G. Trombino, “Motion Correction for Passive Radiation Imaging of Small Vessels in Ship-to-Ship Inspections,” Nuclear Instruments and Methods in Physics Research A, Vol. 805, January 2015, p. 116-126.  Available: http://dx.doi.org/10.1016/j.nima.2015.08.040.
  • J. Littell. E. Lukosi, J.P. Hayward, R. Milburn, A. Rowan, “Coded Moderator Approach for Fast Neutron Source Detection and Localization at Standoff,” Nuclear Instruments and Methods in Physics Research A. Available: http://dx.doi.org/10.1016/j.nima.2014.11.118
  • M.A. Laubach, J.P. Hayward, X. Zhang, J.W. Cates, “Timing and Position Response of a Block Detector for Fast Neutron Time-of-Flight Imaging,” Nuclear Instruments and Methods in Physics Research A, Vol. 763, November 2014, p. 495-501.  Available:http://dx.doi.org/10.1016/j.nima.2014.06.052
  • B. Ayaz-Maierhafer, X. Zhang, J.P. Hayward, Z.W. Bell, M.A. Laubach “Investigation of active background from photofission in depleted uranium using Cherenkov detectors and gamma ray time-of-flight analysis,” IEEE Transactions on Nuclear Science, Vol. 61, No. 4, August 2014, p. 2402-2409,  Available: http://dx.doi.org/10.1109/TNS.2014.2332273.
  • X. Zhang, J.P. Hayward, M.A. Laubach, “New method to remove the electronic noise for absolutely calibrating low gain photomultiplier tube with a higher precision,” Nuclear Instruments and Methods in Physics Research A, Vol. 755, Aug. 2014, p. 32-37. Available: http://dx.doi.org/10.1016/j.nima.2014.04.018
  • S.B. Donnald, J.P. Hayward, C.L. Melcher, M. Koschan, M. Tyagi, H. Rothfuss, “Effect of Codoping on the Thermoluminescense and Non-Proportionality of Gd3Ga3Al2O12:Ce,” IEEE Transactions on Nuclear Science, Vol. 60, No. 5, October 2013, p. 4002-4006.  Available: http://dx.doi.org/10.1109/TNS.2013.2277862.
  • J.W. Cates, J.P. Hayward, and X. Zhang, “Measurement of Achievable Timing Resolution with ZnO:Ga Films,” IEEE Transactions on Nuclear Science, Vol. 60, No. 4, August 2013, p. 3127-3133.  Available: http://dx.doi.org/10.1109/TNS.2013.2272883.
  • S.B. Donnald, M. Tyagi, H. Rothfuss, M. Koschan, J.P. Hayward, M. Zhuravleva, C.L. Melcher, “Sample-to-Sample Variation in Single Crystal YAP:Ce Non-Proportionality,” IEEE Transactions on Nuclear Science, Vol. 99, Sept. 2013, p. 1. Available: http://dx.doi.org/10.1109/TNS.2013.2277860.
  • J.W. Cates, J.P. Hayward, X. Zhang, “Significant Increases in Light Extraction from YAP:Ce Scintillators with a Uniform Surface Taper Modification at the Exit Boundary,” IEEE Transactions on Nuclear Science, Vol. 99, Sept. 2013, p. 1. Available: http://dx.doi.org/10.1109/TNS.2013.2280434
  • X. Zhang, J.W. Cates, J.P. Hayward, G. Bertuccio, D. Puglisi, P.A. Hausladen, “Characterizing the timing performance of a fast 4H-SiC detector with an 241Am source,” IEEE Transactions on Nuclear Science, Vol. 60, Issue 3, June 2013, p. 2352-2356. Available: http://dx.doi.org/10.1109/TNS.2013.2260652.
  • B. Ayaz-Maierhafer, J.P. Hayward, K.P. Ziock, M.A. Blackston, L. Fabris, “Transmission and signal loss in mask designs for a dual neutron and gamma imager applied to mobile standoff detection,” Nuclear Instruments and Methods in Physics Research A, Vol. 712, June 2013, p. 1-8. Available: http://dx.doi.org/10.1016/j.nima.2013.02.001.
  • B. Ayaz-Maierhafer, J.P. Hayward, K.P. Ziock, M.A. Blackston, L. Fabris, “Angular resolution study of a combined gamma-neutron coded aperture imager for standoff detection,” Nuclear Instruments and Methods in Physics Research A, Vol. 712, June 2013, p. 120-125. Available: http://dx.doi.org/10.1016/j.nima.2013.02.005.
  • J.W. Cates, J.P. Hayward, X. Zhang, “Increased Light Extraction from Inorganic Scintillators with Laser-Etched Microstructures,” IEEE Transactions on Nuclear Science, Vol. 60, Issue 2, May 2013, p. 1027-1032. Available: http://dx.doi.org/10.1109/TNS.2013.2249090
  • A.K. Barnett, M.N. Cox, L. Crow, Y. Diawara, L.L. Funk, J.P. Hayward, K. Menhard, V.N. Sedov, “A High Count Rate Neutron Beam Monitor for Neutron Scattering Facilities,” IEEE Transactions on Nuclear Science, Vol. 60, Issue 2, May 2013, p. 668-670. Available: http://dx.doi.org/10.1109/TNS.2012.2225111
  • B. Ayaz-Maierhafer, J.P. Hayward, Z.W. Bell, L.A. Boatner, R.E. Johnson, “Measurements of thermal neutron response in Cherenkov glassed designed for MeV photon detection,” IEEE Transactions on Nuclear Science, Vol. 60, Issue 2, May 2013, p. 701-707. Available: http://dx.doi.org/10.1109/TNS.2013.2247420
  • J.P. Hayward, Z.W. Bell, L.A. Boatner, C.L. Hobbs, R.E. Johnson, J.O. Ramey, G.E. Jellsion, Jr., “Characterizing the response of Cherenkov glass detectors with isotopic gamma-ray sources,” Journal of Radioanalytical and Nuclear Chemistry, Feb. 2013, Vol. 295, Issue 2, pp. 1143-1151. Available: http://dx.doi.org/10.1007/s10967-012-1898-4
  • J.P. Hayward, Z.W. Bell, L.A. Boatner, C.L. Hobbs, R.E. Johnson, J.O. Ramey, G.E. Jellison, Jr., “Simulated Response of Cherenkov Glass Detectors to MeV Photons,” Journal of Radioanalytical and Nuclear Chemistry, Feb. 2013, Vol. 295, Issue 2, pp. 1321-1329. Available: http://dx.doi.org/10.1007/s10967-012-1909-5
  • M. Tyagi, M. Koschan, H. Rothfuss, J.P. Hayward, C.L. Melcher, “Effect of Ca2+ Co-Doping on the Temperature Dependence of Gd2SiO5:Ce Photoluminescence,” IEEE Transactions on Nuclear Science, Vol. 60, Issue 2, April 2013, p. 973-978. Available: http://dx.doi.org/10.1109/TNS.2012.2228235.
  • J. Cates, J.P. Hayward, X. Zhang, P.A. Hausladen, B. Dabbs, “Timing Resolution Study of an Associated Particle Detector for Fast Neutron Imaging,” IEEE Transactions on Nuclear Science, Vol. 59, No. 4, pp. 1750-1756. Available: http://dx.doi.org/10.1109/TNS.2012.2201751.
  • X. Zhang, J.P. Hayward, J.W. Cates, P.A. Hausladen, M.A. Laubach, J.E. Sparger, S.B. Donnald, “Benchmarking the Geant4 full system simulation of an associated particle detector for use in a D-T neutron generator,” Applied Radiation and Isotopes, Vol. 70, August 2012, pp. 1485-1493, Available: http://dx.doi.org/10.1016/j.apradiso.2012.04.026.

PhD dissertations