Fission neutron output measurements at LANSCE

Conference · Fri Jan 01 04:00:00 EST 2010

OSTI ID:986890

Nelson, Ronald Owen ^[1]; Haight, Robert C ^[1]; Devlin, Matthew J ^[1]; Fotiadis, Nikolaos ^[1]; Laptev, Alexander ^[1]; O' Donnell, John M ^[1]; Taddeucci, Terry N ^[1]; Tovesson, Fredrik ^[1]; Ullmann, J L ^[1]; Wender, Stephen A ^[1]; Bredeweg, T A ^[1]; Jandel, M ^[1]; Vieira, D J ^[1]; Wu, Ching - Yen ^[2]; Becker, J A ^[2]; Stoyer, M A ^[2]; Henderson, R ^[2]; Sutton, M ^[2]; Belier, Gilbert ^[3]; Chatillon, A ^[3] ; Granier, Thierry ^[4]; Laurent, Benoit ^[4]; Taieb, Julien ^[4]

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1. Los Alamos National Laboratory
2. LLNL
3. BRUYERES-LE-CHATEL, FRANCE
4. CEA, BRUYERES-LE-CHATEL, FRANCE

Accurate data for both physical properties and fission properties of materials are necessary to properly model dynamic fissioning systems. To address the need for accurate data on fission neutron energy spectra, especially at outgoing neutron energies below about 200 keV and at energies above 8 MeV, ongoing work at LANSCE involving collaborators from LANL, LLNL and CEA Bruyeres-le-Chatel is extending the energy range, efficiency and accuracy beyond previous measurements. Initial work in the outgoing neutron energy range from 1 to 7 MeV is consistent with current evaluations and provides a foundation for extended measurements. As part of these efforts, a new fission fragment detector that reduces backgrounds and improves timing has been designed fabricated and tested, and new neutron detectors are being assessed for optimal characteristics. Simulations of experimental designs are in progress to ensure that accuracy goals are met. Results of these measurements will be incorporated into evaluations and data libraries as they become available.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 986890
• Report Number(s): LA-UR-10-00770; LA-UR-10-770
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCURACY
CEA BRUYERES-LE-CHATEL
EFFICIENCY
ENERGY RANGE
ENERGY SPECTRA
FISSION
FISSION FRAGMENTS
FISSION NEUTRONS
LANL
LAWRENCE LIVERMORE NATIONAL LABORATORY
NEUTRON DETECTORS
NEUTRONS
PHYSICAL PROPERTIES