|
|
|
|
| LEADER |
00000nam a22000003u 4500 |
| 001 |
b10513780 |
| 003 |
CoU |
| 005 |
20181220224012.1 |
| 006 |
m o d f |
| 007 |
cr ||||||||||| |
| 008 |
190514e20160701||| o| f0|||||eng|d |
| 035 |
|
|
|a (TOE)ost1487109
|
| 035 |
|
|
|a (TOE)1487109
|
| 040 |
|
|
|a TOE
|c TOE
|
| 049 |
|
|
|a GDWR
|
| 086 |
0 |
|
|a E 1.99:1487109
|
| 086 |
0 |
|
|a E 1.99:1487109
|
| 245 |
0 |
0 |
|a Using anisotropies in prompt fission neutron coincidences to assess the neutron multiplication of highly multiplying subcritical plutonium assemblies
|h [electronic resource]
|
| 260 |
|
|
|a Washington, D.C. :
|b United States. National Nuclear Security Administration ;
|a Oak Ridge, Tenn. :
|b distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
|c 2016.
|
| 300 |
|
|
|a p. 87-92 :
|b digital, PDF file.
|
| 336 |
|
|
|a text
|b txt
|2 rdacontent.
|
| 337 |
|
|
|a computer
|b c
|2 rdamedia.
|
| 338 |
|
|
|a online resource
|b cr
|2 rdacarrier.
|
| 500 |
|
|
|a Published through SciTech Connect.
|
| 500 |
|
|
|a 07/01/2016.
|
| 500 |
|
|
|a ": S0168900216301917"
|
| 500 |
|
|
|a Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment 825 C ISSN 0168-9002 AM.
|
| 500 |
|
|
|a Mueller, J.; Mattingly, J.
|
| 500 |
|
|
|a Univ. of Michigan, Ann Arbor, MI (United States)
|
| 520 |
3 |
|
|a There is a significant and well-known anisotropy between the prompt neutrons emitted from a single fission event; these neutrons are most likely to be observed at angles near 0° or 180° relative to each other. However, the propagation of this anisotropy through different generations of a fission chain re-action has not been previously studied. We have measured this anisotropy in neutron-neutron coincidences from a subcritical highly-multiplying assembly of plutonium metal. The assembly was a 4.5 kg α-phase plutonium metal sphere composed of 94% <sup>239</sup>Pu and 6% <sup>240</sup>Pu by mass. Data were collected using two EJ-309 liquid scintillators and two EJ-299 plastic scintillators. The angular distribution of neutron-neutron coincidences was measured at 90° and 180° and found to be largely isotropic. Simulations were performed using MCNPX-PoliMi of similar plutonium metal spheres of varying sizes and a correlation between the neutron multiplication of the assembly and the anisotropy of neutron-neutron coincidences was observed. In principle, this correlation could be used to assess the neutron multi-plication of an unknown assembly.
|
| 536 |
|
|
|b NA0002534.
|
| 710 |
1 |
|
|a United States.
|b National Nuclear Security Administration.
|4 spn.
|
| 710 |
1 |
|
|a United States.
|b Department of Energy.
|b Office of Scientific and Technical Information.
|4 dst.
|
| 856 |
4 |
0 |
|u http://www.osti.gov/scitech/biblio/1487109
|z Online Access (via OSTI)
|
| 907 |
|
|
|a .b105137807
|b 03-09-23
|c 05-17-19
|
| 998 |
|
|
|a web
|b 05-17-19
|c f
|d m
|e p
|f eng
|g
|h 0
|i 1
|
| 956 |
|
|
|a Information bridge
|
| 999 |
f |
f |
|i 5de7ef5f-04cf-509f-a3c5-ad2f804dc81d
|s c37c8bc1-8b47-5e28-b829-0697a1cbce94
|
| 952 |
f |
f |
|p Can circulate
|a University of Colorado Boulder
|b Online
|c Online
|d Online
|e E 1.99:1487109
|h Superintendent of Documents classification
|i web
|n 1
|
