Precision measurement of the 238Pu(n,γ ) cross section

Chyzh, A.; Wu, C. Y.; Kwan, E.; Henderson, R. A.; Gostic, J. M.; Bredeweg, T. A.; Couture, A.; Haight, R. C.; Lee, H. Y.; O’Donnell, J. M.; Ullmann, J. L.

doi:10.1103/PhysRevC.88.044607

Precision measurement of the $^{238} Pu (n, γ$ ) cross section

Journal Article · Mon Oct 14 04:00:00 EDT 2013 · Physical Review C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.88.044607· OSTI ID:1237548

Chyzh, A. ^[1]; Wu, C. Y. ^[1]; Kwan, E. ^[2]; Henderson, R. A. ^[1]; Gostic, J. M. ^[1]; Bredeweg, T. A. ^[3]; Couture, A. ^[3]; Haight, R. C. ^[3]; Lee, H. Y. ^[3]; O’Donnell, J. M. ^[3]; Ullmann, J. L. ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); National Superconducting Cyclotron Lab., East Lansing, MI (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, the neutron-capture cross section for ²³⁸Pu was measured by using the detector for advanced neutron-capture experiments (DANCE) array, which is a highly segmented and highly efficient 4π γ-ray calorimeter. The neutron-capture events were recognized by the total γ-ray energy deposited in DANCE, which is equal to the reaction Q value plus the incident neutron energy. The absolute neutron-capture cross section was derived as a function of incident neutron energy from thermal to about 30 keV. The measured cross section for incident neutron energy below 18 eV was performed for the first time by using the direct method and does not support the most recently adopted changes in endf/b-vii.1 where the neutron-capture cross section was lowered by as much as a factor of ~3 in the neighborhood of 0.3 eV from those evaluated in _ENDF/B-VII.0.

View Journal Article

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC52-07NA27344

OSTI ID:: 1237548

Report Number(s):: LLNL-JRNL--641156

Journal Information:: Physical Review C, Nuclear Physics, Journal Name: Physical Review C, Nuclear Physics Journal Issue: 4 Vol. 88; ISSN 0556-2813; ISSN PRVCAN

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

References (17)

New Precision Measurements of the U 235 ( n , γ ) Cross Section Jandel, M.; Bredeweg, T. A.; Bond, E. M. Physical Review Letters, Vol. 109, Issue 20 https://doi.org/10.1103/PhysRevLett.109.202506	journal	November 2012
Neutron Capture Cross Section of Plutonium-238: Determination of Resonance Parameters Silbert, M. G.; Berreth, J. R. Nuclear Science and Engineering, Vol. 52, Issue 2 https://doi.org/10.13182/NSE73-A28188	journal	October 1973
Prompt γ -ray production in neutron-induced fission of 239 Pu Ullmann, J. L.; Bond, E. M.; Bredeweg, T. A. Physical Review C, Vol. 87, Issue 4 https://doi.org/10.1103/PhysRevC.87.044607	journal	April 2013
Systematics of prompt γ -ray emission in fission Chyzh, A.; Wu, C. Y.; Kwan, E. Physical Review C, Vol. 87, Issue 3 https://doi.org/10.1103/PhysRevC.87.034620	journal	March 2013
Neutron Total and Absorption Cross Sections of ²³⁸ Pu Young, T. E.; Simpson, F. B.; Berreth, J. R. Nuclear Science and Engineering, Vol. 30, Issue 3 https://doi.org/10.13182/NSE67-A18398	journal	December 1967
A compact gas-filled avalanche counter for DANCE Wu, C. Y.; Chyzh, A.; Kwan, E. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 694 https://doi.org/10.1016/j.nima.2012.07.056	journal	December 2012
THE NEUTRON CAPTURE CROSS SECTIONS OF Pu ²³⁸ , Pu ²⁴² , AND Am ²⁴³ IN THE THERMAL AND EPICADMIUM REGIONS Butler, J. P.; Lounsbury, M.; Merritt, J. S. Canadian Journal of Physics, Vol. 35, Issue 2 https://doi.org/10.1139/p57-018	journal	February 1957
Neutron capture cross section of Am 241 Jandel, M.; Bredeweg, T. A.; Bond, E. M. Physical Review C, Vol. 78, Issue 3 https://doi.org/10.1103/PhysRevC.78.034609	journal	September 2008
ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology Chadwick, M. B.; Obložinský, P.; Herman, M. Nuclear Data Sheets, Vol. 107, Issue 12 https://doi.org/10.1016/j.nds.2006.11.001	journal	December 2006
Evidence for the stochastic aspect of prompt γ emission in spontaneous fission Chyzh, A.; Wu, C. Y.; Kwan, E. Physical Review C, Vol. 85, Issue 2 https://doi.org/10.1103/PhysRevC.85.021601	journal	February 2012
Spin measurements for Sm 147 + n resonances: Further evidence for nonstatistical effects Koehler, P. E.; Ullmann, J. L.; Bredeweg, T. A. Physical Review C, Vol. 76, Issue 2 https://doi.org/10.1103/PhysRevC.76.025804	journal	August 2007
Fourth-generation spallation neutron target-moderator-reflector-shield assembly at the Manuel Lujan Jr. neutron scattering center Mocko, M.; Muhrer, G. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 704 https://doi.org/10.1016/j.nima.2012.11.103	journal	March 2013
ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data Chadwick, M. B.; Herman, M.; Obložinský, P. Nuclear Data Sheets, Vol. 112, Issue 12 https://doi.org/10.1016/j.nds.2011.11.002	journal	December 2011
Electrodeposition of U and Pu on thin C and Ti substrates Henderson, R. A.; Gostic, J. M.; Burke, J. T. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 655, Issue 1 https://doi.org/10.1016/j.nima.2011.06.023	journal	November 2011
A detector for (n,γ) cross-section measurements at a spallation neutron source Heil, M.; Reifarth, R.; Fowler, M. M. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 459, Issue 1-2 https://doi.org/10.1016/S0168-9002(00)00993-1	journal	February 2001
Measurement of the Np 237 ( n , γ ) cross section from 20 meV to 500 keV with a high efficiency, highly segmented 4 π BaF 2 detector Esch, E. -I.; Reifarth, R.; Bond, E. M. Physical Review C, Vol. 77, Issue 3 https://doi.org/10.1103/PhysRevC.77.034309	journal	March 2008
Neutron-Induced Resonance Fission Cross Section of Pu 238 Stubbins, Warren Fenton; Bowman, Charles D.; Auchampaugh, George F. Physical Review, Vol. 154, Issue 4 https://doi.org/10.1103/PhysRev.154.1111	journal	February 1967

Similar Records

Radiative neutron capture cross section from

{}^{236}U

Journal Article · Wed Aug 23 20:00:00 EDT 2017 · Physical Review C · OSTI ID:1483498

Constraining the calculation of

{}^{234, 236, 238}U (n, γ)

cross sections with measurements of the

γ

-ray spectra at the DANCE facility

Journal Article · Wed Aug 30 20:00:00 EDT 2017 · Physical Review. C · OSTI ID:1390023

Measurement of the

{}^{242 m}{Am}

neutron-induced reaction cross sections

Journal Article · Thu Feb 16 19:00:00 EST 2017 · Physical Review C · OSTI ID:1345338

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Precision measurement of the 238Pu(n,γ ) cross section

Citation Formats

References (17)

Similar Records

Related Subjects

Precision measurement of the $^{238} Pu (n, γ$ ) cross section