PaperPanorama
FAQ

Nuclear Theory·nucl-th

Friday·December 20, 2019

16 papers—6 primary·10 cross-listed

All16Primary6Cross-lists10
  1. 01

    Microscopic calculations of nuclear level densities with the Lanczos method

    W. E. Ormand · B. A. Brown

    A new method for computing the density of states in nuclei making use of an extrapolated form of the tri-diagonal matrix obtained from the Lanczos method is presented. It will be shown that the global, average properties of the entire Lanczos matrix can be predicted from just four Lanczos iterations. The extrapolated Lanczos matrix (ELM) approach provides for an accurate computation of the density of states described within the configuration space, which, in some cases, is sufficient to accurately calculate the density of states at, or near, the neutron separation energy. Comparisons between theory and experiment are shown for Fe, Ge, and Ge. In addition, we show results for the -dependence of moments and the level density for these three nuclei.

    nucl-thPRC(2020)·30 citations
  2. 02

    Systematical study of optical potential strengths in reactions involving strongly, weakly bound and exotic nuclei on Sn

    M. A. G. Alvarez · J. P. Fernández-Garcíaa · J. L. León-García · M. Rodríguez-Gallardo · L. R. Gasques · L. C. Chamon · V. A. B. Zagatto · A. Lépine-Szily · J. R. B. Oliveira · V. Scarduelli · B. V. Carlson · J. Casal and 3 other authors

    We present new experimental angular distributions for the elastic scattering of LiSn at three bombarding energies. We include these data in a wide systematic involving the elastic scattering of He, Li, Be, B and O projectiles on the same target at energies around the respective Coulomb barriers. Considering this data set, we report on optical model analyses based on the double-folding Sao Paulo Potential. Within this approach, we study the sensitivity of the data fit to different models for the nuclear matter densities and to variations in the optical potential strengths.

    nucl-thPRC(2019)·20 citations
  3. 03

    Monte-Carlo generator of heavy ion collisions DCM-SMM

    M. Baznat🇲🇩 · A. Botvina🇷🇺 · G. Musulmanbekov🇷🇺 · V. Toneev🇷🇺 · V. Zhezher🇷🇺

    The new monte-carlo generator of heavy ion collisions, DCM-SMM, based on Dubna Cascade Model (DCM-QGSM) and Statistical Multifragmentation Model (SMM) is described. The model aimed to generate particle--nucleus and nucleus--nucleus collisions at a wide range of energy was created to provide the computer simulation support to new experimental facilities BMN and MPD at the accelerator complex NICA. It can simulate the production of both light particles and nuclear fragments and hyperfragments on the event by event basis.

    nucl-thhep-thPhys.Part.Nucl.Lett.(2020)·85 citations
  4. 04

    Nuclear and neutron-star matter from local chiral interactions

    D. Lonardoni🇺🇸 · I. Tews🇺🇸 · S. Gandolfi🇺🇸 · J. Carlson🇺🇸

    We report a quantum Monte Carlo calculation of the equation of state of symmetric nuclear matter using local interactions derived from chiral effective field theory up to next-to-next-to-leading order fit to few-body observables only. The empirical saturation density and energy are well reproduced within statistical and systematic uncertainties. We have also derived the symmetry energy as a function of the density, finding good agreement with available experimentally derived constraints at saturation and twice saturation density. We find that the corresponding pressure is also in excellent agreement with recent constraints extracted from gravitational waves of the neutron-star merger GW170817 by the LIGO-Virgo detection.

    nucl-thastro-ph.HEnucl-exPRResearch(2020)·106 citations
  5. 05

    Microscopic Optical Potential for Elastic Proton-Nucleus Scattering from Chiral Forces

    C. Giusti · M. Vorabbi · P. Finelli

    A microscopic optical potential (OP) is derived from NN chiral potentials at the first-order term within the spectator expansion of the multiple scattering theory and adopting the impulse approximation. The performances of our OP are compared with those of a phenomenological OP in the description of elastic proton scattering data on different isotopic chains. An analogous scheme is adopted to construct a microscopic OP for elastic antiproton-nucleus scattering. The results of our OPs are in reasonably good agreement with the experimental data, for both elastic proton and antiproton-nucleus scattering.

    nucl-thNucl.Theor.(2019)·0 citations
  6. 06

    A schematic reaction-theory model for nuclear fission

    G. F. Bertsch

    The K-matrix formalism is applied to a schematic model for nuclear fission. The purpose is to explore the dependence of observables on the assumptions made about the configuration space and nucleon interaction in the Hamiltonian of the fissile nucleus. As expected, branching ratios in induced fission are found to depend sensitively on the character of the residual interaction, whether it is pairing in form or taken from a random ensemble. On the other hand, the branching ratio is not much affected by the presence of additional configurations that do not introduce new fission paths.

    nucl-thPRC(2020)·10 citations

Affiliations

first authorsco-authorsvia INSPIRE