https://digital.library.unt.edu/ark:/67531/metadc888955/m2/1/high_res_d/900147.pdf

ENDF/B-VII.0: Next Generation Evaluated Nuclear Data Library for Nuclear Science and Technology

H1 1/2+ 99.985 H2 1+ 0.015 He3 1/2+ 0.000137 He4 0+ 99.999863 Li6 1+ 7.5 Li7 3/292.5 Be9 3/2100 B10 3+ 19.9 B11 3/280.1 C12 0+ 98.90 C13 1/21.10 N14 1+ 99.634 N15 1/20.366 O16 0+ 99.762 O17 5/2+ 0.038 O18 0+ 0.200 F19 1/2+ 100 Ne20 0+ 90.48 Ne21 3/2+ 0.27 Ne22 0+ 9.25 Na23 3/2+ 100 Mg24 0+ 78.99 Mg25 5/2+ 10.00 Mg26 0+ 11.01 Al27 5/2+ 100 Si28 0+ 92.23 Si29 1/2+ 4.67 Si30 0+ 3.10 P31 1/2+ 100 S32 0+ 95.02 S33 3/2+ 0.75 S34 0+ 4.21 S36 0+ 0.02 * Cl35 3/2+ 75.77 Cl37 3/2+ 24.23 Ar36 0+ 0.337 Ar38 0+ 0.063 Ar40 0+ 99.600 * K39 3/2+ 93.2581 K40 41.277E+9 y EC,β0.0117 K41 3/2+ 6.7302 Ca40 0+ 96.941 Ca42 0+ 0.647 Ca43 7/20.135 Ca44 0+ 2.086 Ca46 0+ 0.004 Ca48 0+ 6E+18 y β-,β-β0.187 * Sc45 7/2100 Ti46 0+ 8.0 Ti47 5/27.3 Ti48 0+ 73.8 Ti49 7/25.5 Ti50 0+ 5.4 * V50 6+ 1.4E+17 y EC,β0.250 V51 7/299.750 Cr50 0+ 1.8E+17 y ECEC 4.345 Cr52 0+ 83.789 Cr53 3/29.501 Cr54 0+ 2.365 * Mn55 5/2100 * Fe54 0+ 5.8 Fe56 0+ 91.72 Fe57 1/22.2 Fe58 0+ 0.28 Co59 7/2100 Ni58 0+ 68.077 Ni60 0+ 26.223 Ni61 3/21.140 Ni62 0+ 3.634 Ni64 0+ 0.926 Cu63 3/269.17 Cu65 3/230.83 * Zn64 0+ 48.6 Zn66 0+ 27.9 Zn67 5/24.1 Zn68 0+ 18.8 Zn70 0+ 5E+14 y

核素图册 = Chart of the nuclides

Neutron capture and transmission measurements were performed by the time-of-flight technique at the Rensselaer Polytechnic Institute linac facility using metallic and liquid Gd samples. The liquid ...

/pdf/neutron-capture-and-total-cross-section-measurements-and-3xz2i9v94m.pdf

Neutron Capture and Total Cross-Section Measurements and Resonance Parameters of Gadolinium

Standard and goal-oriented adaptive mesh refinement applied to radiation transport on 2D unstructured triangular meshes

Nuclear data sheets for A = 149

The purpose of the present work is to accurately measure the neutron cross sections of samarium. The most significant isotope is {sup 149}Sm, which has a large neutron absorption cross section at thermal energies and is a {sup 235}U fission product with a 1% yield. Its cross sections are thus of concern to reactor neutronics. Neutron capture and transmission measurements were performed by the time-of-flight technique at the Rensselaer Polytechnic institute (RPI) LINAC facility using metallic and liquid Sm samples. The capture measurements were made at the 25 meter flight station with a multiplicity-type capture detector, and the transmission total cross-section measurements were performed at 15- and 25-meter flight stations with {sup 6}Li glass scintillation detectors. Resonance parameters were determined by a combined analysis of six experiments (three capture and three transmission) using the multi-level R-matrix Bayesian code SAMMY version M2. The significant features of this work are as follows. Dilute samples of samarium nitrate in deuterated water (D{sub 2}O) were prepared to measure the strong resonances at 0.1 and 8 eV without saturation. Disk-shaped spectroscopic quartz cells were obtained with parallel inner surfaces to provide a uniform thickness of solution. The diluent feature of the SAMMY program was usedmore » to analyze these data. The SAMMY program also includes multiple scattering corrections to capture yield data and resolution functions specific to the RPI facility. Resonance parameters for all stable isotopes of samarium were deduced for all resonances up to 30 eV. Thermal capture cross-section and capture resonance integral calculations were made using the resultant resonance parameters and were compared to results obtained using resonance parameters from ENDF/B-VI updated through release 3. Extending the definition of the capture resonance integral to include the strong 0.1 eV resonance in {sup 149}Sm, present measurements agree within estimated uncertainties with EnDF/B-VI release 3. The thermal capture cross-section was calculated from the present measurements of the resonance parameters and also agrees with ENDF within estimated uncertainties. The present measurements reduce the statistical uncertainties in resonance parameters compared to prior measurements.« less

/pdf/neutron-capture-and-transmission-measurements-and-resonance-3mtaunruqy.pdf

Neutron capture and transmission measurements and resonance parameter analysis of niobium

The Rensselaer Polytechnic Institute linear accelerator with the enhanced thermal target was used for neutron transmission measurements of rare earth metal samples of holmium, erbium, and thulium and isotopically enriched oxide samples of 166 Er2O3 and 167 Er2O3 in the energy range from 0.001 to 20 eV. The measurements were done with a 15-m time-of-flight spectrometer and provided high-quality data in the thermal and subthermal region as well as in the low energy resonance region. The effect of paramag- netic scattering on these cross sections is discussed. The data were corrected for paramagnetic scattering, and resonance parameters were obtained by fitting the transmission with the SAMMY multilevel R-matrix code. These results were compared to the ENDF0B-VI evaluation and to other measurements.

/pdf/neutron-total-cross-section-measurements-and-resonance-3aeywj54ow.pdf

Neutron Total Cross-Section Measurements and Resonance Parameter Analysis of Holmium, Thulium, and Erbium from 0.001 to 20 eV

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Neutron capture and transmission measurements and resonance parameter analysis of niobium

Neutron Total Cross-Section Measurements and Resonance Parameter Analysis of Holmium, Thulium, and Erbium from 0.001 to 20 eV