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The accuracy of the procedure that converts the experimentally determined electron spectrum associated with fission of the nuclear fuels ^{235}U, ^{239}Pu, ^{241}Pu, and ^{238}U into the $\bar{\nu}_e$ spectrum is examined. By using…

High Energy Physics - Phenomenology · Physics 2008-11-26 Petr Vogel

The $(n,\gamma f)$ process is reviewed in light of modern nuclear reaction calculations in both slow and fast neutron-induced fission reactions on $^{235}$U and $^{239}$Pu. Observed fluctuations of the average prompt fission neutron…

Nuclear Theory · Physics 2018-06-06 J. Eric Lynn , Patrick Talou , Olivier Bouland

Recently, three antineutrino experiments at Daya Bay, Double Chooz, and RENO measured the neutrino mixing angle $\theta_{13}$, each using a nuclear reactor power plant. However, significant discrepancies were found, both in the absolute…

High Energy Physics - Experiment · Physics 2018-11-21 Xubo Ma , Le Yang

In this paper, we study the impact of the inclusion of the recently measured beta decay properties of the $^{102;104;105;106;107}$Tc, $^{105}$Mo, and $^{101}$Nb nuclei in an updated calculation of the antineutrino energy spectra of the four…

In recent years, investigations of angular distributions of fragments in neutron-induced nuclear fission have been extended to intermediate energies, up to 200 MeV, as well as to a wide range of target isotopes. Using as an example the…

Nuclear Theory · Physics 2022-01-12 A. L. Barabanov , A. S. Vorobyev , A. M. Gagarski , O. A. Shcherbakov , L. A. Vaishnene

Over the last decade, ingenuous developments in Monte Carlo methods have enabled the unbiased estimation of adjoint-weighted reactor parameters expressed as bilinear forms, such as kinetics parameters and sensitivity coefficients. A…

Computational Physics · Physics 2024-07-09 Eric Dumonteil , Emma Horton , Andreas E. Kyprianou , Andrea Zola

Total cross sections for neutron scattering from nuclei, with energies ranging from 10 to 600 MeV and from many nuclei spanning the mass range 6Li to 238U, have been analyzed using a simple, three-parameter, functional form. The calculated…

Nuclear Theory · Physics 2007-05-23 Pradip Deb , Ken Amos , Steven Karataglidis

In this paper we study the effect of, well-known, higher order corrections to the allowed beta decay spectrum on the determination of anti-neutrino spectra resulting from the decays of fission fragments. In particular, we try to estimate…

High Energy Physics - Phenomenology · Physics 2015-03-19 Patrick Huber

Quantifying inherent neutron sources in matter, particularly $(\alpha, n)$ reactions and spontaneous fission, is important in nuclear engineering and other fields. The SOURCES code is a common tool for calculating the yield and spectrum of…

Nuclear Theory · Physics 2025-10-28 Sigtryggur Hauksson , Ilaria Casalbore , Daniele Tomatis , Nunzio Burgio

We construct an analytical model derived from nuclear reaction theory and having a simple functional form to demonstrate the quantitative agreement with the measured cross sections for neutron induced reactions. The neutron-nucleus total,…

Nuclear Theory · Physics 2011-05-02 Tapan Mukhopadhyay , Joydev Lahiri , D. N. Basu

The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision era. The positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya Bay…

High Energy Physics - Experiment · Physics 2021-07-07 Daya Bay collaboration , F. P. An , A. B. Balantekin , H. R. Band , M. Bishai , S. Blyth , G. F. Cao , J. Cao , J. F. Chang , Y. Chang , H. S. Chen , S. M. Chen , Y. Chen , Y. X. Chen , J. Cheng , Z. K. Cheng , J. J. Cherwinka , M. C. Chu , J. P. Cummings , O. Dalager , F. S. Deng , Y. Y. Ding , M. V. Diwan , T. Dohnal , J. Dove , M. Dvorak , D. A. Dwyer , J. P. Gallo , M. Gonchar , G. H. Gong , H. Gong , W. Q. Gu , J. Y. Guo , L. Guo , X. H. Guo , Y. H. Guo , Z. Guo , R. W. Hackenburg , S. Hans , M. He , K. M. Heeger , Y. K. Heng , A. Higuera , Y. K. Hor , Y. B. Hsiung , B. Z. Hu , J. R. Hu , T. Hu , Z. J. Hu , H. X. Huang , X. T. Huang , Y. B. Huang , P. Huber , D. E. Jaffe , K. L. Jen , X. L. Ji , X. P. Ji , R. A. Johnson , D. Jones , L. Kang , S. H. Kettell , S. Kohn , M. Kramer , T. J. Langford , J. Lee , J. H. C. Lee , R. T. Lei , R. Leitner , J. K. C. Leung , F. Li , J. J. Li , Q. J. Li , S. Li , S. C. Li , W. D. Li , X. N. Li , X. Q. Li , Y. F. Li , Z. B. Li , H. Liang , C. J. Lin , G. L. Lin , S. Lin , J. J. Ling , J. M. Link , L. Littenberg , B. R. Littlejohn , J. C. Liu , J. L. Liu , C. Lu , H. Q. Lu , J. S. Lu , K. B. Luk , X. B. Ma , X. Y. Ma , Y. Q. Ma , C. Marshall , D. A. Martinez Caicedo , K. T. McDonald , R. D. McKeown , Y. Meng , J. Napolitano , D. Naumov , E. Naumova , J. P. Ochoa-Ricoux , A. Olshevskiy , H. -R. Pan , J. Park , S. Patton , J. C. Peng , C. S. J. Pun , F. Z. Qi , M. Qi , X. Qian , N. Raper , J. Ren , C. Morales Reveco , R. Rosero , B. Roskovec , X. C. Ruan , H. Steiner , J. L. Sun , T. Tmej , K. Treskov , W. -H. Tse , C. E. Tull , B. Viren , V. Vorobel , C. H. Wang , J. Wang , M. Wang , N. Y. Wang , R. G. Wang , W. Wang , W. Wang , X. Wang , Y. Wang , Y. F. Wang , Z. Wang , Z. Wang , Z. M. Wang , H. Y. Wei , L. H. Wei , L. J. Wen , K. Whisnant , C. G. White , H. L. H. Wong , E. Worcester , D. R. Wu , F. L. Wu , Q. Wu , W. J. Wu , D. M. Xia , Z. Q. Xie , Z. Z. Xing , J. L. Xu , T. Xu , T. Xue , C. G. Yang , L. Yang , Y. Z. Yang , H. F. Yao , M. Ye , M. Yeh , B. L. Young , H. Z. Yu , Z. Y. Yu , B. B. Yue , S. Zeng , Y. Zeng , L. Zhan , C. Zhang , F. Y. Zhang , H. H. Zhang , J. W. Zhang , Q. M. Zhang , X. T. Zhang , Y. M. Zhang , Y. X. Zhang , Y. Y. Zhang , Z. J. Zhang , Z. P. Zhang , Z. Y. Zhang , J. Zhao , L. Zhou , H. L. Zhuang , J. H. Zou

We report results of fully non-perturbative, Path Integral Monte Carlo (PIMC) calculations for dilute neutron matter. The neutron-neutron interaction in the s channel is parameterized by the scattering length and the effective range. We…

Nuclear Theory · Physics 2011-02-21 Gabriel Wlazlowski , Piotr Magierski

Neutron-induced fission of $^{237}$Np has been measured over a wide range of incident neutron energies using a twin Frisch-gridded ionization chamber (TFGIC) and a thin-backed $^{237}$Np target. These measurements were performed at the Los…

Neutron energy spectrum from 120 GeV protons on a thick copper target was measured at the Meson Test Beam Facility (MTBF) at Fermi National Accelerator Laboratory. The data allows for evaluation of neutron production process implemented in…

The cross section averaged over 235U thermal-neutron induced fission spectrum is a fundamental quantity that can be used in evaluation and validation of nuclear data. Many experiments focused on the determination of Spectrum Averaged Cross…

An experiment was performed at the scientific neutron source FRM II in Garching to determine the cumulative antineutrino spectrum of the fission products of $^{238}$U. This was achieved by irradiating target foils of natural uranium with a…

Nuclear Experiment · Physics 2015-06-18 N. Haag , A. Gütlein , M. Hofmann , L. Oberauer , W. Potzel , K. Schreckenbach , F. M. Wagner

The mass and kinetic energy distribution of nuclear fragments from thermal neutron-induced fission of 235U have been studied using a Monte-Carlo simulation. Besides reproducing the pronounced broadening in the standard deviation of the…

Computational Physics · Physics 2009-11-13 M. Montoya , J. Rojas , E. Saettone

The LAQGSM code has been recently developed at Los Alamos National Laboratory to simulate nuclear reactions for proton radiography applications. We have benchmarked our code against most available measured data both for proton-nucleus and…

Nuclear Theory · Physics 2007-05-23 S. G. Mashnik , K. K. Gudima , R. E. Prael , A. J. Sierk

The Hauser-Feshbach fission fragment decay model, $\mathtt{HF^3D}$, which calculates the statistical decay of fission fragments, has been expanded to include multi-chance fission, up to neutron incident energies of 20 MeV. The deterministic…

Nuclear Theory · Physics 2021-02-24 A. E. Lovell , T. Kawano , S. Okumura , I. Stetcu , M. R. Mumpower , P. Talou

Monte Carlo calculations of fission of actinides and pre-actinides induced by protons and neutrons in the energy range from 100 MeV to 1 GeV are carried out by means of a recent version of the Li\`ege Intranuclear Cascade Model, INCL++,…

Nuclear Theory · Physics 2014-12-02 Sergio Lo Meo , Davide Mancusi , Cristian Massimi , Gianni Vannini , Alberto Ventura