82 citations · 343 across the 25 of their papers we have counts for
26 papers
New Procedure for the Evaluation of Fission Product Yields: Application to the Spontaneous Fission of Cf
A. E. Lovell, T. Kawano, P. Talou
Over the last decade, there has been significant improvement in the understanding and modeling of the decay of fission fragments by both prompt and delayed emission. These model im…
Updating GEANIE Pu prompt -ray experimental data using modern Hauser-Feshbach fission fragment decay model
Toshihiko Kawano, Amy E. Lovell, Patrick Talou +1
We calculate fission rays for neutron-induced reactions on Pu with the Hauser-Feshbach fission fragment decay model. By applying the calculated fission rays as a ba…
Deblurring fission fragment mass distributions
Pierre Nzabahimana, Amy E. Lovell, Patrick Talou
Measurements of fission fragment mass distributions provide valuable insights into the properties of fissioning systems and the dynamics of the fission process. Pre-neutron emissio…
Time Evolution of Prompt Gamma-Ray Emission in Cf(sf) and U(,f) Reactions
Patrick Talou, Amy E. Lovell, Ionel Stetcu +3
We investigate the time evolution of prompt fission emission due to the presence of ns to ms isomers in the fragments produced in the neutron-induced fission of U a…
Solving one-dimensional penetration problem for fission channel in the statistical Hauser-Feshbach theory
Toshihiko Kawano, Patrick Talou, Stephane Hilaire
We solve the Schrödinger equation for an arbitrary one-dimensional potential energy to calculate the transmission coefficient in the fission channel of compound nucleus reactions.…
The Los Alamos evaluation of Pu neutron-induced reactions in the fast energy range
M. R. Mumpower, D. Neudecker, T. Kawano +5
A major revision of the evaluation of Pu neutron-induced reaction cross sections is reported in the fast energy range. The evaluation starts at 2.5 keV incident neutron ene…
Consideration of memory of spin and parity in the fissioning compound nucleus by applying the Hauser-Feshbach fission fragment decay model to photonuclear reactions
Toshihiko Kawano, Amy E. Lovell, Shin Okumura +3
Prompt and -delayed fission observables, such as the average number of prompt and delayed neutrons, the independent and cumulative fission product yields, and the prompt -ray…
Nuclear data activities for medium mass and heavy nuclei at Los Alamos
M. R. Mumpower, T. M Sprouse, T. Kawano +7
Nuclear data is critical for many modern applications from stockpile stewardship to cutting edge scientific research. Central to these pursuits is a robust pipeline for nuclear mod…
Correlations between energy and -ray emission in
Nathan P. Giha, Stefano Marin, James A. Baker +15
We study -ray emission following over an incident neutron energy range of MeV. We present the first experimental evidence for po…
Angular momentum removal by neutron and -ray emissions during fission fragment decays
I. Stetcu, A. E. Lovell, P. Talou +4
We investigate the angular momentum removal from fission fragments (FFs) through neutron and -ray emission, where we find that about half the neutrons are emitted with angular m…
Structure in the Event-by-Event Energy-Dependent Neutron-Gamma Multiplicity Correlations in (sf)
Stefano Marin, Mustapha Stephan Okar, Eoin P. Sansevero +13
The emission of neutrons and gamma rays by fission fragments reveal important information about the properties of fragments immediately following scission. The initial fragment pro…
Influence of non-statistical properties in nuclear structure on emission of prompt fission neutrons
Toshihiko Kawano, Shin Okumura, Amy E. Lovell +2
The Hauser-Feshbach Fission Fragment Decay (HFD) model is extended to calculate the prompt fission neutron spectrum (PFNS) for the thermal neutron induced fission on U,…
Fission Fragment Decay Simulations with the CGMF Code
P. Talou, I. Stetcu, P. Jaffke +3
The CGMF code implements the Hauser-Feshbach statistical nuclear reaction model to follow the de-excitation of fission fragments by successive emissions of prompt neutrons and …
Extension of the Hauser-Feshbach Fission Fragment Decay Model to Multi-Chance Fission
A. E. Lovell, T. Kawano, S. Okumura +3
The Hauser-Feshbach fission fragment decay model, , which calculates the statistical decay of fission fragments, has been expanded to include multi-chance fission,…
Correlations Between Fission Fragment and Neutron Anisotropies in Neutron-Induced Fission
A. E. Lovell, P. Talou, I. Stetcu +1
Several sources of angular anisotropy for fission fragments and prompt neutrons have been studied in neutron-induced fission reactions. These include kinematic recoils of the targe…
Quantifying Uncertainties on Fission Fragment Mass Yields With Mixture Density Networks
A. E. Lovell, A. T. Mohan, P. Talou
Probabilistic machine learning techniques can learn both complex relations between input features and output quantities of interest as well as take into account stochasticity or un…
Event-by-Event Multiplicity Correlations in Cf(sf)
Stefano Marin, Vladimir A. Protopopescu, Ramona Vogt +7
Excited nuclear fragments are emitted during nuclear fission. The de-excitation of these fission fragments takes place as sequential emission of neutrons followed by photons. A cor…
Prompt Neutron Multiplicity Distributions Inferred from -ray and Fission Fragment Energy Measurements
A. E. Lovell, I. Stetcu, P. Talou +2
We propose a novel method to extract the prompt neutron multiplicity distribution, , in fission reactions based on correlations between prompt neutrons, rays, and fragmen…
High resolution measurement of tagged two-neutron energy and angle correlations in Cf-252(sf)
P. F. Schuster, M. J. Marcath, S. Marin +9
Background: Spontaneous fission events emit prompt neutrons correlated with one another in emission angle and energy. Purpose: We explore the relationship in energy and angle betwe…
U(n, f) Independent Fission Product Yield and Isomeric Ratio Calculated with the Statistical Hauser-Feshbach Theory
Shin Okumura, Toshihiko Kawano, Patrick Talou +2
We have developed a Hauser-Feshbach fission fragment decay model, HFD, which can be applied to the statistical decay of more than 500 primary fission fragment pairs (1,000 nucl…
Hauser-Feshbach fission fragment de-excitation with calculated macroscopic-microscopic mass yields
Patrick Jaffke, Peter Moller, Patrick Talou +1
The Hauser-Feshbach statistical model is applied to the de-excitation of primary fission fragments using input mass yields calculated with macroscopic-microscopic models of the pot…
Revisiting the role of the process in the low-energy fission of U and Pu
J. Eric Lynn, Patrick Talou, Olivier Bouland
The process is reviewed in light of modern nuclear reaction calculations in both slow and fast neutron-induced fission reactions on U and Pu. Observed fluc…
Late Time Emission of Prompt Fission Gamma Rays
P. Talou, T. Kawano, I. Stetcu +3
The emission of prompt fission rays within a few nanoseconds to a few microseconds following the scission point is studied in the Hauser-Feshbach formalism applied to the deexc…
Random-matrix approach to the statistical compound nuclear reaction at low energies using the Monte-Carlo technique
T. Kawano, P. Talou, H. A. Weidenmüller
Using a random-matrix approach and Monte-Carlo simulations, we generate scattering matrices and cross sections for compound-nucleus reactions. In the absence of direct reactions we…