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We calculate the Inverse Beta Decay (IBD) antineutrino spectrum generated by nuclear reactors using the summation method to understand deviations from the smooth Huber-Mueller model due to the decay of individual fission products, showing…

Nuclear Theory · Physics 2018-07-25 A. A. Sonzogni , M. Nino , E. A. McCutchan

Nuclear astrophysics and californium fission neutron spectrum averaged cross sections and their uncertainties for ENDF materials have been calculated. Absolute values were deduced with Maxwellian and Mannhart spectra, while uncertainties…

Solar and Stellar Astrophysics · Physics 2015-05-26 Boris Pritychenko

Two new facilities have recently been proposed to measure low energy neutrino-nucleus cross sections, the nu-SNS (Spallation Neutron Source) and low energy beta beams. The former produces neutrinos by pion decay at rest, while the latter…

Nuclear Theory · Physics 2009-11-10 G. C. McLaughlin

Beta-delayed neutron emission and $\beta$-delayed fission ($\beta$df) probabilities were calculated for heavy, neutron-rich nuclei using the Los Alamos coupled Quasi-Particle Random Phase Approximation plus Hauser-Feshbach (QRPA+HF)…

Nuclear Theory · Physics 2023-01-11 M. R. Mumpower , T. Kawano , T. M. Sprouse

A generalized phenomenological (3 + 2 + 1)-model with three active and three sterile neutrinos is considered for the calculation of the neutrino oscillation characteristics at normal mass hierarchy of active neutrinos and significant…

High Energy Physics - Phenomenology · Physics 2016-12-28 V. V. Khruschov , S. V. Fomichev , O. A. Titov

Prompt and $\beta$-delayed fission observables, such as the average number of prompt and delayed neutrons, the independent and cumulative fission product yields, and the prompt $\gamma$-ray energy spectra for the photonuclear reactions on…

Nuclear Theory · Physics 2023-04-26 Toshihiko Kawano , Amy E. Lovell , Shin Okumura , Hirokazu Sasaki , Ionel Stetcu , Patrick Talou

A consistent framework for treating the energy dependence of fission-fragment neutron multiplicities is presented. The shape evolution of the compound nucleus towards scission is treated in the strong damping limit using the Metropolis walk…

Nuclear Theory · Physics 2019-09-16 M. Albertsson

We developed a four-dimensional Langevin model which can treat the deformation of each fragment independently and applied it to low energy fission of 236U, the compound system of the reaction n+$^{235}$U. The potential energy is calculated…

We computed ground-state energies of calcium isotopes from 42Ca to 48Ca by means of the Auxiliary Field Diffusion Monte Carlo (AFDMC) method. Calculations were performed by replacing the 40Ca core with a mean-field self consistent potential…

Nuclear Theory · Physics 2008-03-19 S. Gandolfi , F. Pederiva , S. a Beccara

Neutron- and proton-induced fission cross-sections of separated isotopes of tungsten (182W, 183W, 184W, and 186W) and 181Ta relative to 209Bi have been measured in the incident nucleon energy region 50 - 200 MeV using fission chambers based…

Long duration gamma-ray bursts (GRBs) are among the least understood astrophysical transients powering the high-energy universe. To date, various mechanisms have been proposed to explain the observed electromagnetic GRB emission. In this…

High Energy Astrophysical Phenomena · Physics 2021-05-26 Tetyana Pitik , Irene Tamborra , Maria Petropoulou

Theoretical study of systematics of neutron scattering cross sections on various materials for neutron energies up to several hundred MeV are of practical importance. In this paper, we analysed the experimental neutron scattering total…

Nuclear Theory · Physics 2007-05-23 R. S. Gowda , S. S. V. Suryanarayana , S. Ganesan

The data taken with the ANTARES neutrino telescope from 2007 to 2010, a total live time of 863 days, are used to measure the oscillation parameters of atmospheric neutrinos. Muon tracks are reconstructed with energies as low as 20 GeV.…

High Energy Physics - Experiment · Physics 2015-06-05 ANTARES collaboration , S. Adrian-Martinez , I. Al Samarai , A. Albert , M. Andre , M. Anghinolfi , G. Anton , S. Anvar , M. Ardid , T. Astraatmadja , J. -J. Aubert , B. Baret , S. Basa , V. Bertin , S. Biagi , C. Bigongiari , C. Bogazzi , M. Bou-Cabo , B. Bouhou , M. C. Bouwhuis , J. Brunner , J. Busto , A. Capone , C. Carloganu , J. Carr , S. Cecchini , Z. Charif , Ph. Charvis , T. Chiarusi , M. Circella , R. Coniglione , L. Core , H. Costantini , P. Coyle , A. Creusot , C. Curtil , G. De Bonis , M. P. Decowski , I. Dekeyser , A. Deschamps , C. Distefano , C. Donzaud , D. Dornic , Q. Dorosti , D. Drouhin , T. Eberl , U. Emanuele , A. Enzenhoefer , J. -P. Ernenwein , S. Escoffier , K. Fehn , P. Fermani , M. Ferri , S. Ferry , V. Flaminio , F. Folger , U. Fritsch , J. -L. Fuda , S. Galata , P. Gay , K. Geyer , G. Giacomelli , V. Giordano , A. Gleixner , J. P. Gomez-Gonzalez , K. Graf , G. Guillard , G. Hallewell , M. Hamal , H. van Haren , A. J. Heijboer , Y. Hello , J. J. Hernandez-Rey , B. Herold , J. Hoessl , C. C. Hsu , M. de Jong , M. Kadler , O. Kalekin , A. Kappes , U. Katz , O. Kavatsyuk , P. Kooijman , C. Kopper , A. Kouchner , I. Kreykenbohm , V. Kulikovskiy , R. Lahmann , G. Lambard , G. Larosa , D. Lattuada , D. Lefevre , G. Lim , D. Lo Presti , H. Loehner , S. Loucatos , F. Louis , S. Mangano , M. Marcelin , A. Margiotta , J. A. Martinez-Mora , A. Meli , T. Montaruli , M. Morganti , L. Moscoso , H. Motz , M. Neff , E. Nezri , D. Palioselitis , G. E. Pavalas , K. Payet , J. Petrovic , P. Piattelli , V. Popa , T. Pradier , E. Presani , C. Racca , C. Reed , G. Riccobene , C. Richardt , R. Richter , C. Riviere , A. Robert , K. Roensch , A. Rostovtsev , J. Ruiz-Rivas , M. Rujoiu , G. V. Russo , D. F. E. Samtleben , A. Sanchez-Losa , P. Sapienza , J. Schmid , J. Schnabel , F. Schoeck , J. -P. Schuller , F. Schuessler , T. Seitz , R. Shanidze , F. Simeone , A. Spies , M. Spurio , J. J. M. Steijger , Th. Stolarczyk , M. Taiuti , C. Tamburini , A. Trovato , B. Vallage , C. Vallee , V. Van Elewyck , M. Vecchi , P. Vernin , E. Visser , S. Wagner , G. Wijnker , J. Wilms , E. de Wolf , H. Yepes , D. Zaborov , J. D. Zornoza , J. Zuniga

Systematics have been created for neutron spectra from the 7Li(p,n) reaction at 0 deg in the 50-200 MeV proton energy region. The available experimental data in the continuum part of the spectra show satisfactory overall agreement with a…

Nuclear Theory · Physics 2007-05-23 Alexander Prokofiev , Mark Chadwick , Stepan Mashnik , Nils Olson , Laurie Waters

Antineutrinos stream freely from rapidly decaying fission products within the cores of nuclear reactors and from long-lived natural radioactivity within the rocky layers of the Earth. These global antineutrinos produce detectable signals in…

Instrumentation and Detectors · Physics 2021-01-14 Steve Dye , Andrew Barna

The back-shifted Fermi gas model is widely employed for calculating nuclear level density (NLD) as it can effectively reproduce experimental data by adjusting parameters. However, selecting parameters for nuclei lacking experimental data…

Nuclear Theory · Physics 2024-07-01 Peng-Xiang Du , Tian-Shuai Shang , Kun-Peng Geng , Jian Li , Dong-Liang Fang

Monte Carlo-transport codes are designed to simulate the complex neutron transport physics associated with nuclear systems. These codes are tasked with simulating phenomena such as temperature effects on cross-sections, thermo-physical…

A possibility of synthesizing neutron-reach super-heavy elements in spallation targets of Accelerator Driven Systems (ADS) is considered. A dedicated software called Nuclide Composition Dynamics (NuCoD) was developed to model the evolution…

Instrumentation and Detectors · Physics 2015-12-09 Igor Mishustin , Yury Malyshkin , Igor Pshenichnov , Walter Greiner

Recent measurements of the reactor antineutrino emission show that there exists a spectral excess (the "bump") in the 5-7 MeV region when compared to the Huber-Muller prediction based on the conversion method. Analysis within an alternate…

Nuclear Experiment · Physics 2023-08-11 Samuel Kim , C. J. Martoff , Michael Dion , David Glasgow

Relativistic outflows with neutrons inevitably lead to inelastic collisions, and resulting subphotospheric gamma rays may explain prompt emission of gamma-ray bursts. In this model, hadronuclear, quasithermal neutrinos in the 10-100 GeV…

High Energy Astrophysical Phenomena · Physics 2013-10-01 Kohta Murase , Kazumi Kashiyama , Peter Meszaros
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