The authors review the present status of self-consistent mean-field (SCMF) models for describing nuclear structure and low-energy dynamics. These models are presented as effective energy-density functionals. The three most widely used variants of SCMF's based on a Skyrme energy functional, a Gogny force, and a relativistic mean-field Lagrangian are considered side by side. The crucial role of the treatment of pairing correlations is pointed out in each case. The authors discuss other related nuclear structure models and present several extensions beyond the mean-field model which are currently used. Phenomenological adjustment of the model parameters is discussed in detail. The performance quality of the SCMF model is demonstrated for a broad range of typical applications.

Self-consistent mean-field models for nuclear structure

The fourth version of the Japanese Evaluated Nuclear Data Library has been produced in cooperation with the Japanese Nuclear Data Committee. In the new library, much emphasis is placed on the impro...

https://www.tandfonline.com/doi/pdf/10.1080/18811248.2011.9711675

JENDL-4.0: A New Library for Nuclear Science and Engineering

Nuclear constitution and the interpretation of fission phenomena

https://escholarship.org/content/qt65v5x6mx/qt65v5x6mx.pdf?t=p0uwbn

Nuclear masses and deformations

The jellium model of simple metal clusters has enjoyed remarkable empirical success, leading to many theoretical questions. In this review, we first survey the hierarchy of theoretical approximations leading to the model. We then describe the jellium model in detail, including various extensions. One important and useful approximation is the local-density approximation to exchange and correlation effects, which greatly simplifies self-consistent calculations of the electronic structure. Another valuable tool is the semiclassical approximation to the single-particle density matrix, which gives a theoretical framework to connect the properties of large clusters with the bulk and macroscopic surface properties. The physical properties discussed in this review are the ground-state binding energies, the ionization potentials, and the dipole polarizabilities. We also treat the collective electronic excitations from the point of view of the cluster response, including some useful sum rules.

/pdf/the-physics-of-simple-metal-clusters-self-consistent-jellium-3u9wf8r66h.pdf

The physics of simple metal clusters: self-consistent jellium model and semiclassical approaches

A national project to develop a future capability to separate actinides and long-lived fission products from spent fuel, to transmute them, and to dispose off the remaining waste in optimal waste forms has begun in the United States. This project is based on the Accelerator-driven Transmutation of Waste (ATW) program developed during the 1990s at Los Alamos National Laboratory, and has its technological roots in several technologies that have been developed by the multi-mission laboratories of the U.S. Department of Energy (DOE). In the Fiscal Year 1999 Energy and Water Appropriation Act, the U.S. Congress directed the DOE to study ATW and by the end of FY99 to prepare a “roadmap” for developing this technology. DOE convened a steering committee, assembled four technical working groups consisting of members from many national laboratories, and consulted with several individual international and national experts. The finished product, “A Roadmap for Developing ATW Technology – A Report to Congress,” recommends a five-year, $281 M, science-based, technical-risk-reduction program. This paper provides an overview of the U.S. Roadmap for developing ATW technology, the organization of the national ATW Project, the critical issues in subsystems and technological options, deployment scenarios, institutional challenges, and academic and international collaboration.

The U.S. accelerator transmutation of waste program

Mu mesonic x-rays, fast electron scattering, and electronic spectra each depend on the nuclear charge distribution {rho}(r) in different ways. Adjoining theoretical analyses of observations on these different phenomena may therefore bracket an acceptable set of functional descriptions for {rho}(r). The present paper reports the dependence of the mu-mesonic x-ray spectrum of Pb on the extent and shape of the nuclear charge density. For several functional families representing conceivable forms for {rho}(r) the authors have obtained the resultant Coulomb potentials and have solved exactly by electronic computation the relativistic equations to yield the first four levels (1S, 2S, and 2P) and transition energies for mu mesons bound in the field of the lead nucleus. The next two levels (3D) have been found by perturbation theory. Effects omitted from the calculations have been examined and theoretical uncertainties estimated for each level. These results permit adjustment of the effective electric radius R, for each form of {rho}(r) to agree with known x-ray measurements of the 2P to lS transitions. Calculations completed for neighboring values of R permit interpolation to improved values when more precise measurements are made and when small corrections of the raw data for electrodynamic and special coupling effects havemore » been carried through.« less

Mu-Mesonic X-Rays and the Shape of the Nuclear Charge Distribution

A roadmap for developing ATW technology: System scenarios & integration

A Ranger measurement of the distribution-in-range of knock-on protons from thin paraffin layers indicates the distribution-in-energy from 0.4 Mev to 7 Mev of the neutrons emitted from uranium bombarded by neutrons from the thermal column of the Argonne Heavy Water Reactor. The spectrum shows a broad maximum near 0.75 Mev and follows closely an exponential drop from 2 Mev to 7 Mev with a relaxation energy of 1.55 Mev. The observed neutron intensity does not go to zero below 16 Mev.

David L. Hill

Papers

Nuclear constitution and the interpretation of fission phenomena

The U.S. accelerator transmutation of waste program

Mu-Mesonic X-Rays and the Shape of the Nuclear Charge Distribution

A roadmap for developing ATW technology: System scenarios & integration

The Neutron Energy Spectrum from U 235 Thermal Fission