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Nuclear Theory·nucl-th

Friday·November 11, 2016

8 papers—5 primary·3 cross-listed

All8Primary5Cross-lists3
  1. 01

    HoTCoffeeh: Hanbury Brown-Twiss correlation functions and radii from event-by-event hydrodynamics

    Christopher Plumberg🇺🇸 · Ulrich Heinz🇺🇸

    (anbury Brwn-wiss rrelation unctions and radii rom vent-by-vent ydrodynamics) is a new computational tool which determines Hanbury Brown-Twiss (HBT) charged pion () correlation functions and radii for event-by-event (EBE) hydrodynamics with fluctuating initial conditions in terms of Cooper-Frye integrals, including resonance decay contributions. In this paper, we review the basic formalism for computing the HBT correlation functions and radii with resonance decay contributions included, and discuss our implementation of this formalism in the form of HoTCoffeeh. This tool may be easily integrated with other numerical packages for the purpose of simulating the evolution of heavy-ion collisions and thereby extracting predictions for heavy-ion observables.

    nucl-thnucl-exPRC(2018)·16 citations
  2. 02

    Does the Gogny interaction need a third Gaussian?

    D. Davesne🇫🇷 · P. Becker🇫🇷 · A. Pastore🇬🇧 · J. Navarro🇪🇸

    By considering infinite matter constraints only, we suggest in this paper that the Gogny interaction should benefit from a third Gaussian in its central part. A statistical analysis is given to select the possible ranges which are compatible with these constraints and which minimize a function.

    nucl-thActa Phys.Polon.B(2017)·5 citations
  3. 03

    Formation of hypernuclei in evaporation and fission processes

    A.S. Botvina🇩🇪 · N. Buyukcizmeci🇹🇷 · A. Ergun🇹🇷 · R.Ogul🇹🇷 · M. Bleicher🇩🇪 · J. Pochodzalla🇩🇪

    There are excellent opportunities to produce excited heavy hyper residues in relativistic hadron and peripheral heavy-ion collisions. We investigate the disintegration of such residues into hyper nuclei via evaporation of baryons and light clusters and their fission. Previously these processes were well known for normal nuclei as the decay channels at low excitation energies. We have generalized these models for the case of hyper-matter. In this way we make extension of nuclear reaction studies at low temperature into the strange sector. We demonstrate how the new decay channels can be integrated in the whole disintegration process. Their importance for mass and isotope distributions of produced hyper-fragments is emphasized. New and exotic isotopes obtained within these processes may provide a unique opportunity for investigating hyperon interaction in nuclear matter.

    nucl-thPRC(2016)·17 citations
  4. 04

    NeutronC scattering: emergence of universal properties in a finite range potential

    M. A. Shalchi · M.T. Yamashita · M. R. Hadizadeh · T. Frederico · Lauro Tomio

    The low-energy properties of the elastic wave scattering for the C are studied near the critical condition for the occurrence of an excited Efimov state in C. It is established to which extent the universal scaling laws, strictly valid in the zero-range limit, survive when finite range potentials are considered. By fixing the two-neutrons separation energy in C with available experimental data, it is studied the scaling of the real () and imaginary parts of the wave phase-shift with the variation of the C binding energy. We obtain some universal characteristics given by the pole-position of and effective-range parameters. By increasing the C binding energy, it was verified that the excited state of C goes to a virtual state, resembling the neutron-deuteron behavior in the triton. It is confirmed that the analytical structure of the unitary cut is not affected by the range of the potential or mass asymmetry of the three-body system.

    nucl-thPLB(2017)·8 citations
  5. 05

    Description of nuclear systems with a self-consistent configuration-mixing approach. II: Application to structure and reactions in even-even sd-shell nuclei

    C. Robin🇫🇷 · N. Pillet🇫🇷 · M. Dupuis🇫🇷 · J. Le Bloas🇫🇷 · D. Peña Arteaga🇫🇷 · J.-F. Berger🇫🇷

    The variational multiparticle-multihole configuration mixing approach (MPMH) to nuclei has been proposed about a decade ago. While the first applications followed rapidly, the implementation of the full formalism of this method has only been recently completed and applied in [C. Robin, N. Pillet, D. Peña Arteaga and J.-F. Berger, Phys. Rev. C 93, 024302 (2016)] to C as a test-case. The main objective of the present paper is to carry on the study that was initiated in that reference, in order to put the MPMH method to more stringent tests. To that aim we perform a systematic study of even-even sd-shell nuclei. The wave function of these nuclei is taken as a configuration mixing built on orbitals of the sd-shell, and both the mixing coefficients of the nuclear state and the single-particle wave functions are determined consistently from the same variational principle. The calculations are done using the D1S Gogny force. Various ground-state properties are analyzed. In particular, the correlation content and composition of the wave function as well as the single-particle orbitals and energies are examined. Binding energies and charge radii are also calculated and compared to experiment. The description of the first excited state is also examined and the corresponding transition densities are used as input for the calculation of inelastic electron and proton scattering. Special attention is paid to the effect of the optimization of the single-particle states consistently with the correlations of the system. Globally, the results are satisfying and encouraging. In particular, charge radii and excitation energies are nicely reproduced. However, the chosen valence-space truncation scheme precludes achieving maximum collectivity in the studied nuclei. Further refinement of the method and a better-suited interaction are necessary to remedy this situation.

    nucl-thPRC(2017)·20 citations

Affiliations

first authorsco-authorsvia INSPIRE