PaperPanorama
FAQ

Nuclear Theory·nucl-th

Tuesday·November 12, 2019

11 papers—5 primary·6 cross-listed

All11Primary5Cross-lists6
  1. 01

    Role of the Surface Energy in Heavy-Ion Collisions

    P. D. Stevenson

    The surface energy is one of the fundamental properties nuclei, appearing in the simplest form of the semi-empirical mass formula. The surface enery has an influence on e.g. the shape of a nucleus and its ability to deform. This in turn could be expected to have an effect in fusion reactions around the Coulomb barrier where dynamical effects such as the formation of a neck is part of the fusion process. Frozen Hartree-Fock and Time-Dependent Hartree-Fock calculations are made for a series of effective interactions in which the surface energy is systematically varied, using Ca + Ca as a test case. The dynamical lowering of the barrier is greatest for the largest surface energy, contrary to naive expectations, and we speculate that this may be due to the variation in other nuclear matter properties for these effective interactions

    nucl-thEPJ Web Conf.(2020)·2 citations
  2. 02

    Theoretical study of isotope productions by muon capture reaction on

    Maureen Ciccarelli🇯🇵 · Futoshi Minato🇯🇵 · Tomoya Naito🇯🇵

    The isotope , the generator of used for diagnostic imaging, is supplied by extracting from fission fragments of highly enriched uranium in reactors. However, a reactor-free production method of is searched over the world from the point of view of nuclear proliferation. Recently, production through a muon capture reaction was proposed and it was found that about of turned into through reaction [arXiv:1908.08166]. However, the detailed physical process of the muon capture reaction is not completely understood. We, therefore, study the muon capture reaction of by a theoretical approach. We used the proton-neutron QRPA to calculate the muon capture rate. The muon wave function is calculated with considering the electronic distribution of the atom and the nuclear charge distribution. The particle evaporation process from the daughter nucleus is calculated by a statistical model. From the model calculation, about of is converted to through the muon capture reaction, which is in a reasonable agreement with the experimental data. It is revealed that negative parity states, especially state, play an important role in . The feasibility of production by the muon capture reaction is also discussed. Isotope production by the muon capture reaction strongly depends on the nuclear structure.

    nucl-thnucl-exPRC(2020)·8 citations
  3. 03

    Jet-fluid interaction in the EPOS3-Jet framework

    Iurii Karpenko🇫🇷 · Joerg Aichelin🇫🇷 · Pol Bernard Gossiaux🇫🇷 · Martin Rohrmoser🇵🇱 · Klaus Werner🇫🇷

    EPOS3-Jet is an integrated framework for jet modelling in heavy ion collisions, where the initial hard (jet) partons are produced along with soft (medium) partons in the initial state EPOS approach. The jet partons then propagate in the hydrodynamically expanding medium. The energy and momentum lost by the jet partons is added to the hydrodynamic medium via the source terms. The full evolution proceeds in a concurrent mode, without separating hydrodynamic and jet parts. In this report, we examine the medium recoil effects in Pb-Pb collisions at TeV LHC energy in the EPOS3-Jet framework.

    nucl-thhep-phnucl-exSpringer Proc.Phys.(2020)·1 citation
  4. 04

    Mean-field calculations of charge radii in ground and isomeric states of Cd isotopes

    P. Sarriguren

    Quadrupole moments and charge radii in cadmium isotopes are studied from a microscopic perspective. The results obtained from self-consistent deformed Hartree-Fock+BCS calculations with Skyrme forces are compared with isomer and isotope shifts measured from high resolution laser spectroscopy experiments. The microscopic calculations reproduce fairly well the main features observed in those isotopes that include the linear increase with the neutron number of the quadrupole moments of the 11/2- isomers, as well as the parabolic behavior of the mean-square charge radii difference between isomers and ground states.

    nucl-thPRC(2019)·9 citations
  5. 05

    Pairing correlations and eigenvalues of two-body density matrix in atomic nuclei

    Michelangelo Sambataro · Nicolae Sandulescu

    The quantum phases of superconductivity and superfluidity are characterised mathematically by the Yang concept of Off-Diagonal Long Range Order (ODLRO), related to the existence of a large eigenvalue of the density matrix. We analyse how the Yang criterion applies for various Hamiltonians commonly employed to describe superfluid-type correlations in atomic nuclei. For like-particle pairing Hamiltonians the behaviour of the largest eigenvalue of two-body density matrix shows a clear evidence for a transition between a normal to a paired phase. However, this is not the case for the isoscalar proton-neutron pairing interactions acting in self-conjugate nuclei.

    nucl-thAnnals Phys.(2020)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE