Photofission Cross Sections for {sup 237}Np in the Energy Interval from 5.27 to 10.83 MeV

Journal Article · Wed Nov 15 04:00:00 EST 2000 · Nuclear Science and Engineering

OSTI ID:20804675

Geraldo, L P ^[1]; Semmler, R ^[2]; Goncalez, O L ^[3]; Mesa, J ^[4]; Arruda-Neto, J D.T. ^[4]; Garcia, F ^[4]; Rodriguez, O ^[4]

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1. Instituto de Pesquisas Cientificas (Brazil)
2. Instituto de Pesquisas Energeticas e Nucleares (Brazil)
3. Instituto de Estudos Avancados/CTA (Brazil)
4. Universidade de Sao Paulo (Brazil)

Photofission cross sections for {sup 237}Np have been measured as a function of energy, in the interval from 5.27 to 10.83 MeV. The gamma-ray spectra were those produced by thermal neutron capture, in 30 different target materials, at a tangential beam hole of the Instituto de Pesquisas Energeticas e Nucleares IEA-R1 2-MW research reactor. The set of experimental data has been unfolded employing least-squares methods and the covariance matrix methodology. The determined photofission cross sections for {sup 237}Np, together with the complete correlation matrix for the involved errors, are presented and are compared with previous measurements reported in the literature. A statistical calculation for the {sup 237}Np photofission cross sections was performed, and the results are compared with the experimental data.

• OSTI ID: 20804675
• Journal Information: Nuclear Science and Engineering, Journal Name: Nuclear Science and Engineering Journal Issue: 3 Vol. 136; ISSN NSENAO; ISSN 0029-5639
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAM HOLES
CAPTURE
CORRELATIONS
CROSS SECTIONS
ENERGY DEPENDENCE
ERRORS
GAMMA SPECTRA
LEAST SQUARE FIT
MEV RANGE
NEPTUNIUM 237
NEPTUNIUM 237 TARGET
PHOTOFISSION
RESEARCH REACTORS
THERMAL NEUTRONS