Energy levels of light nuclei A = 13–15

Ajzenberg‐Selove, F.

doi:10.1016/0375-9474(70)90002-3

Cited by 323 publications

(47 citation statements)

References 1,248 publications

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“…(1) The general walk of this cross section is flat up to 5.5 MeV above the threshold because the first excited state in the final nucleus tsO is located 5.18 MeV above the ground state [18]. (Both other reactions have excited states of the residual nuclei at much lower energies).…”

Section: Discussionmentioning

confidence: 98%

Evidence for boson-mode excitations in the16O(α,n) and20Ne(α,n) excitation functions

et al. 1973

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Section: Discussionmentioning

confidence: 98%

Evidence for boson-mode excitations in the16O(α,n) and20Ne(α,n) excitation functions

et al. 1973

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“…In the upper side of the graphs, the ground and excited states of the residual nuclei that can contribute to these reactions are indicated. [14][15][16] In Figs. 10 and 13, the energy ranges where charged particles emitted in the 19 F(n,n 0 +p) 18 O and 19 F(n,n 0 + ) 15 N reactions can kinematically appear are also indicated.…”

Section: Double-differential Cross Sectionmentioning

confidence: 99%

Measurement of Charged-Particle Emission Double-Differential Cross Section of Fluorine for 14.2MeV Neutrons

Kondo

Murata

Ochiai

et al. 2011

Journal of Nuclear Science and Technology

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We carried out detailed measurement of the double-differential cross sections of fluorine for the emissions of protons, deuterons, tritons, and -particles with 14.2 MeV incident neutrons. An improved charged-particle spectrometer with a pencil DT-neutron beam furnished at the FNS facility of the Japan Atomic Energy Agency enabled us to obtain precise data with a fine energy resolution over a wide energy range and an angular range from 15 to 150 . The present experiment is the first simultaneous measurement of the four different kinds of charged particles and provides useful data to establish a nuclear reaction model of fluorine as well as to confirm previous experimental data. Angular-differential cross sections for several discrete peaks corresponding to excited states of residual nuclei were extracted to discuss the reaction mechanism of charged-particle emission. The obtained data suggest that the charged-particle emission reaction of fluorine has a complicated mechanism in which there are contributions from the direct reaction, pre-equilibrium, and equilibrium processes. The obtained data were compared with the nuclear data evaluated in JENDL-3.3 and ENDF/B-VII.0. The results show large differences in the energy and angular distributions of emitted particles and the charged-particle production cross sections between the measured and evaluated data.

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“…To this end, the 14 N evaluation was extended by BNL and LANL to include the resonance region around 9.172 MeV [233]. For this particular case, photonuclear resonance parameters were deduced from Ajzenberg-Selove [234].…”

Section: A Evaluationsmentioning

confidence: 99%

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

Chadwick

Obložinský

Herman

et al. 2006

Nuclear Data Sheets

1,962

908

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We describe the next generation general purpose Evaluated Nuclear Data File, ENDF/B-VII.0, of recommended nuclear data for advanced nuclear science and technology applications. The library, released by the U.S. Cross Section Evaluation Working Group (CSEWG) in December 2006, contains data primarily for reactions with incident neutrons, protons, and photons on almost 400 isotopes. The new evaluations are based on both experimental data and nuclear reaction theory predictions.The principal advances over the previous ENDF/B-VI library are the following: (1) New cross sections for U, Pu, Th, Np and Am actinide isotopes, with improved performance in integral validation criticality and neutron transmission benchmark tests; (2) More precise standard cross sections for neutron reactions on H, 6 Li, 10 B, Au and for 235,238 U fission, developed by a collaboration with the IAEA and the OECD/NEA Working Party on Evaluation Cooperation (WPEC); (3) Improved thermal neutron scattering; (4) An extensive set of neutron cross sections on fission products developed through a WPEC collaboration; (5) A large suite of photonuclear reactions; (6) Extension of many neutron-and proton-induced reactions up to an energy of 150 MeV; (7) Many new light nucleus neutron and proton reactions; (8) Post-fission beta-delayed photon decay spectra; (9) New radioactive decay data; and (10) New methods developed to provide uncertainties and covariances, together with covariance evaluations for some sample cases.The paper provides an overview of this library, consisting of 14 sublibraries in the same, ENDF-6 format, as the earlier ENDF/B-VI library. We describe each of the 14 sublibraries, focusing on neutron reactions. Extensive validation, using radiation transport codes to simulate measured critical assemblies, show major improvements: (a) The long-standing underprediction of low enriched U thermal assemblies is removed; (b) The 238 U, 208 Pb, and 9 Be reflector biases in fast systems are largely removed; (c) ENDF/B-VI.8 good agreement for simulations of highly enriched uranium assemblies is preserved; (d) The underprediction of fast criticality of 233,235 U and 239 Pu assemblies is removed; and (e) The intermediate spectrum critical assemblies are predicted more accurately.We anticipate that the new library will play an important role in nuclear technology applications, including transport simulations supporting national security, nonproliferation, advanced reactor and fuel cycle concepts, criticality safety, medicine, space applications, nuclear astrophysics, and nuclear physics facility design. The ENDF/B-VII.0 library is archived at the National Nuclear Data Center,

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Energy levels of light nuclei A = 13–15

Cited by 323 publications

References 1,248 publications

Evidence for boson-mode excitations in the16O(α,n) and20Ne(α,n) excitation functions

Evidence for boson-mode excitations in the16O(α,n) and20Ne(α,n) excitation functions

Measurement of Charged-Particle Emission Double-Differential Cross Section of Fluorine for 14.2MeV Neutrons

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

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