Neutron scattering from elemental uranium and thorium

Smith, A.B.; Chiba, Satoshi

doi:10.1016/0306-4549(95)00028-3

Cited by 19 publications

(9 citation statements)

References 12 publications

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“…11. Calculated elastic and inelastic scattering angular distributions of first, second, third, and fourth excited states (solid line) compared with experimental data [58] for n + 232 Th reactions. The results are offset by factors of ×10, ×10 2 , ×10 3 , .…”

Section: The Global Optical Model Potential Parametersmentioning

confidence: 99%

Global phenomenological optical model potential for nucleon-actinide reactions at energies up to 300 MeV

Han

Liang

et al. 2010

Phys. Rev. C

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A set of new global phenomenological optical model potential parameters for the actinide region with incident nucleon energies from 1 keV up to 300 MeV is obtained. They are based on a smooth, unique functional form for the energy dependence of the potential depths and on physically constrained geometry parameters. The available experimental data including the neutron total cross sections, nonelastic cross sections, elastic scattering cross sections, elastic scattering angular distributions, and proton reaction cross sections and elastic scattering angular distributions of 232 Th and 238 U are used. The new nucleon global optical model potential parameters obtained are analyzed and used to analyze the experimental data of nucleon-actinide reactions. It is found that the present form of the global optical model potential could reproduce both the neutron and the proton experimental data.

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Section: The Global Optical Model Potential Parametersmentioning

confidence: 99%

Global phenomenological optical model potential for nucleon-actinide reactions at energies up to 300 MeV

Han

Liang

et al. 2010

Phys. Rev. C

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“…It is important to remark the advantage of dispersive approach for average resonance parameters description. The Abfalterer et al [34] Volev et al [35] Iwasaki et al [49] Poenitz et al [50] Poenitz et al [51] Total cross section [mb] Energy Haouat et al [52] Elastic Angular distribution [mb/str] 2 + Smith et al [53] Batchelor et al [54] Iwasaki et al [55] Schreder et al [56] Hansen et al [57] Dukarevich et al [58] Hudson et al [59] 15. real potential of this work is almost flat toward the low energies, by a combination of the increasing contribution of the smooth "Hartree-Fock" V HF (E) potential with the decreasing dispersive contribution (which goes to zero at Fermi energy). Such behavior allows for a good simultaneous description of the average low-energy total cross sections, strength functions, and scattering radius.…”

Section: Comparison With Experimental Databasesmentioning

confidence: 99%

Dispersive coupled-channel analysis of nucleon scattering fromTh232up to 200 MeV

et al. 2005

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An isospin-dependent coupled-channels optical model potential containing a dispersive term (including nonlocal contribution) is used to simultaneously fit the available experimental database (including strength functions and scattering radius) for neutron and proton scattering on strongly deformed 232 Th nucleus. The energy range 0.001-200 MeV is covered. A dispersive coupled-channel optical model potential with parameters that show a smooth energy dependence and energy independent geometry are determined from fits to the entire data set. Dispersive contribution is shown to be the dominant Coulomb correction to the proton real potential below the Coulomb barrier. Inclusion of nonlocality effects in the absorptive volume potential and its corresponding dispersive contribution to the real potential is needed to achieve an excellent agreement above 100 MeV.

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“…over the entire rotational band, which is also a quantity easily extracted from a coupledchannels optical model calculation. We have used data of this type measured from 4.5 to 10 MeV by Smith [25], and in the 14-MeV region by Hansen et al [26] and with a larger set of scattering angles by Guanran et al [27]; these two data sets are in good agreement.…”

Section: A2 Low-energy Parametersmentioning

confidence: 60%

Analysis of differences in the ENDL99 and ENDL2009 nuclear data libraries pertaining to 238U

Ormand¹,

Beck²,

Thompson³

et al. 2012

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A careful analysis is performed on the differences exhibited in the evaluated elastic and inelastic channels between the ENDL99 and ENDL2009 libraries for neutrons incident on 238 U. The two libraries are compared with experimental data as well as results obtained from calculations utilizing a new Hauser-Feshbach reaction code and two modern, high-quality optical potentials. Overall, the ENDL2009 evaluation is found to be more physical, and a better representation of experimental data. The only exception is that the angular distributions for the elastic channel in the ENDL99 library are in better agreement at backward angles for incident neutron energies in the range 0.7-1.3 MeV. Other issues with the inelastic scattering data in ENDL2009 are pointed out.

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Neutron scattering from elemental uranium and thorium

Cited by 19 publications

References 12 publications

Global phenomenological optical model potential for nucleon-actinide reactions at energies up to 300 MeV

Global phenomenological optical model potential for nucleon-actinide reactions at energies up to 300 MeV

Dispersive coupled-channel analysis of nucleon scattering fromTh232up to 200 MeV

Analysis of differences in the ENDL99 and ENDL2009 nuclear data libraries pertaining to 238U

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