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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

The number and properties of the neutrons and photons emitted in nuclear fission are directly related to the excitation energy of the fission fragments when they are formed at scission. Though not observable experimentally because of the…

Nuclear Theory · Physics 2025-10-09 Antonio Bjelčić , Nicolas Schunck , Marc Verriere

In nuclear fission, a heavy nucleus splits into two fragments, driven by the Coulomb repulsion between the positively charged protons. The fission process is governed by the potential energy and basic transport properties of nuclear matter…

Nuclear Theory · Physics 2025-09-30 Karl-Heinz Schmidt , Christelle Schmitt , Andreas Heinz

Nuclear excitation induced by lasers holds broad application prospects in precision metrology and nuclear energy, such as nuclear batteries and nuclear clocks. In the present work, the nuclear excitation via inelastic electron scattering…

Nuclear Theory · Physics 2025-08-27 Qiong Xiao , Yangyang Xu , Junhao Cheng , Liangqi Zhang , Wenyu Zhang , Yongsheng Huang , Tongpu Yu

Neutrino flow is the dominant mechanism of energy transfer in the latest stages of supernovae explosions and in compact stars. The Standard Model of particle physics and accelerator data, provide a satisfactory description of neutrino…

Solar and Stellar Astrophysics · Physics 2012-12-27 Andrea Cipollone

Recent progress towards the non-fission ignition of thermonuclear micro-explosions raises the prospect for a revival of the nuclear bomb propulsion idea, both for the fast transport of large payloads within the solar system and the launch…

Plasma Physics · Physics 2008-03-27 F. Winterberg

Predictions of material activation inventories will be a key input to virtually all aspects of the operation, safety and environmental assessment of future fusion nuclear plants. Additionally, the neutron-induced transmutation (change) of…

Materials Science · Physics 2016-04-29 M. R. Gilbert , J. -Ch. Sublet

Muons can be created in nascent neutron stars (NSs) due to the high electron chemical potentials and the high temperatures. Because of their relatively lower abundance compared to electrons, their role has so far been ignored in numerical…

High Energy Astrophysical Phenomena · Physics 2017-12-20 R. Bollig , H. -Th. Janka , A. Lohs , G. Martinez-Pinedo , C. J. Horowitz , T. Melson

The nuclear fission process that occurs in the core of nuclear reactors results in unstable, neutron rich fission products that subsequently beta decay and emit electron anti-neutrinos. These reactor neutrinos have served neutrino physics…

Instrumentation and Detectors · Physics 2015-12-09 D. M. Asner , K. Burns , L. W. Campbell , B. Greenfield , M. S. Kos , J. L. Orrell , M. Schram , B. VanDevender , 1 L. S. Wood , D. W. Wootan

For 75 years the theory of nuclear fission has been based on the existence of a collective coordinate associated with the nuclear shape, an assumption required by the Bohr-Wheeler formula as well as by the R-matrix theory of fission. We…

Nuclear Theory · Physics 2014-12-19 G. F. Bertsch

This article reviews how nuclear fission is described within nuclear density functional theory. In spontaneous fission, half-lives are the main observables and quantum tunnelling the essential concept, while in induced fission the focus is…

Nuclear Theory · Physics 2018-02-21 N. Schunck , L. M. Robledo

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

One of the central problems in supernova theory is the question how massive stars explode. Understanding the physical processes that drive the explosion is crucial for linking the stellar progenitors to the final remnants and for predicting…

Astrophysics · Physics 2007-05-23 H. -Th. Janka , R. Buras , K. Kifonidis , M. Rampp , T. Plewa

A simple one-dimensional gas-piston kinetic model gives the interaction potential between two colliding heavy ions. In the frame of the classical, thermodynamical approach, the colliding heavy ions are not submitted to friction, but…

Nuclear Theory · Physics 2019-05-10 Mario J. Pinheiro

Estimated masses of fissioning and non-fissioning radioactive elements and their respective distributions within the Earth are presented, based upon the fundamental identity of the components of the interior 82% of the Earth, the…

High Energy Physics - Phenomenology · Physics 2007-05-23 J. Marvin Herndon , Dennis A. Edgerley

Photofission of actinides is studied in the region of nuclear excitation energies that covers the entire giant dipole resonance (GDR) region. A comparative analysis of the behavior of the symmetric and asymmetric modes of photon induced…

Nuclear Theory · Physics 2015-04-16 Debasis Bhowmick , Debasis Atta , D. N. Basu , Alok Chakrabarti

Superheavy isotopes are highly neutron rich nuclei in the vicinity of neutron drip-line, stabilized by shell effect against the instability due to repulsive component of nuclear force, analogous to superheavy elements similarly stabilized…

Nuclear Theory · Physics 2007-05-23 L. Satpathy , S. K. Patra , R. K. Choudhury

Muon-induced fission could be utilized as a probe to study the underlying dynamics of nuclear fission. The probability of muon attachment to the light asymmetric fission fragment is sensitive to fission dynamics, such as the timescale and…

Nuclear Theory · Physics 2025-07-04 Christian Ross , A. S. Umar

Geometrical structure of matter at subnuclear densities is investigated in the presence of a degenerate gas of neutrinos as encountered in stellar collapse. The crystalline phases with spherical, cylindrical and planar nuclei as well as…

Astrophysics · Physics 2009-10-31 Gentaro Watanabe , Kei Iida , Katsuhiko Sato

Future advanced nuclear rocket propulsion, and the availability of new nuclear power cycle designs, will benefit substantially from the large current investment in alternative nuclear energy that is underway today. We propose a new nuclear…

Physics and Society · Physics 2024-03-25 R. V. Duncan , Cuikun Lin , Andrew K. Gillespie , John Gahl