Measurement of thermal neutron capture cross sections of 237Np and 242Pu using prompt gamma neutron activation

Genreith, Christoph; Roßbach, M.; Mauerhofer, Eric; Belgya, T.; Caspary, Guido

doi:10.1007/s10967-012-2080-8

Cited by 12 publications

(2 citation statements)

References 19 publications

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“…It is particularly relevant for modeling reactor performance and the development of next generation reactors [1,2] because it has a long half-life of 3.8 × 10 5 years. Little experimental data have been published on the 242 Pu(n,γ) reaction except for a few isolated incident neutron energy regions such as cross section data at thermal energy [3][4][5][6][7][8][9][10] and the energy range of ≈ 6−90 keV [11]. However, an extensive set of the 242 Pu(n,f) cross sections for incident neutron energies ranging from ≈ 10 2 −10 8 eV were reported [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Absolute measurement of thePu242neutron-capture cross section

Buckner

Henderson

et al. 2016

Phys. Rev. C

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The absolute neutron-capture cross section of 242 Pu was measured at the Los Alamos Neutron Science Center using the Detector for Advanced Neutron-Capture Experiments array along with a compact parallel-plate avalanche counter for fission-fragment detection. The first direct measurement of the 242 Pu(n,γ) cross section was made over the incident neutron energy range from thermal to ≈ 6 keV, and the absolute scale of the (n,γ) cross section was set according to the known 239 Pu(n,f) resonance at En,R = 7.83 eV. This was accomplished by adding a small quantity of 239 Pu to the 242 Pu sample. The relative scale of the cross section, with a range of four orders of magnitude, was determined for incident neutron energies from thermal to ≈ 40 keV. Our data, in general, are in agreement with previous measurements and those reported in ENDF/B-VII.1; the 242 Pu(n,γ) cross section at the En,R = 2.68 eV resonance is within 2.4% of the evaluated value. However, discrepancies exist at higher energies; our data are ≈30% lower than the evaluated data at En ≈ 1 keV and are approximately 2σ away from the previous measurement at En ≈ 20 keV.

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Section: Introductionmentioning

confidence: 99%

Absolute measurement of thePu242neutron-capture cross section

Buckner

Henderson

et al. 2016

Phys. Rev. C

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“…References [3][4][5][6][7][8][9][10] report cross sections for thermal neutron capture, and Ref. [11] provides cross sections at incident neutron energies E n ≈ 6-90 keV.…”

Section: Introductionmentioning

confidence: 99%

²⁴²Pu absolute neutron-capture cross section measurement

Buckner

Henderson

et al. 2017

EPJ Web Conf.

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Abstract. The absolute neutron-capture cross section of 242 Pu was measured at the Los Alamos Neutron Science Center using the Detector for Advanced Neutron-Capture Experiments array along with a compact parallel-plate avalanche counter for fission-fragment detection. During target fabrication, a small amount of 239 Pu was added to the active target so that the absolute scale of the 242 Pu(n,γ ) cross section could be set according to the known 239 Pu(n,f) resonance at E n,R = 7.83 eV. The relative scale of the 242 Pu(n,γ ) cross section covers four orders of magnitude for incident neutron energies from thermal to ≈ 40 keV. The cross section reported in ENDF/B-VII.1 for the 242 Pu(n,γ ) E n,R = 2.68 eV resonance was found to be 2.4% lower than the new absolute 242 Pu(n,γ ) cross section.

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