@inproceedings{dedd57daef4b4ca7a8ff5747d79fa269,
title = "Plutonium metal spontaneous fission neutron cross-correlation measurements",
abstract = "A plutonium metal sample was measured by a fast-neutron multiplicity counter for characterization of spontaneous fission neutron anisotropy and for verification of MCNPX-PoliMi calculations. Accurate neutron angular distribution models are important to properly simulating fast neutron coincidence measurements for nuclear nonproliferation and safeguards applications. A majority of prompt neutrons are emitted from fully accelerated fission fragments; those neutrons carry momentum from the fission fragments, and thus an anisotropic neutron angular distribution is observed in the laboratory reference frame. The fast-neutron multiplicity counter was used with pulse shape discrimination techniques to produce neutron-neutron cross-correlation time distributions from spontaneous fission in a lead-shielded 0.84 g 240Pueff metal sample. Due to neutron anisotropy, the number of observed neutron cross-correlations varied as a function of angle between a detector pair and fission source. Fewer neutron correlations were observed at detector angles near 90 degrees, relative to higher and lower detector angles. Both the neutron coincident detections as a function of time difference and detector pair angle are compared with MCNPX-PoliMi calculations and show good agreement.",
author = "Marcath, {Matthew J.} and Shin, {Tony H.} and Clarke, {Shaun D.} and Dolan, {Jennifer L.} and Marek Flaska and Larsen, {Edward W.} and Pozzi, {Sara A.} and Paolo Peerani",
note = "Publisher Copyright: {\textcopyright} 2014 IEEE.; IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014 ; Conference date: 08-11-2014 Through 15-11-2014",
year = "2016",
month = mar,
day = "10",
doi = "10.1109/NSSMIC.2014.7431089",
language = "English (US)",
series = "2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014",
address = "United States",
}