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Nuclear Theory·nucl-th

Thursday·November 24, 2016

7 papers—4 primary·3 cross-listed

All7Primary4Cross-lists3
  1. 01

    [Submitted on 22 Nov 2016]

    Multi-neutron emission of Cd isotopes

    A. P. Severyukhin · N. N. Arsenyev · I. N. Borzov · E. O. Sushenok

    An influence of the phonon-phonon coupling (PPC) on the -decay half-lives and multi-neutron emission probabilities is analysed within the microscopic model based on the Skyrme interaction with tensor components included. The finite-rank separable approximation is used in order to handle large two-quasiparticle spaces. The even-even nuclei near the r-process pathes at are studied. The characteristics of ground states, excitations and -decay strength of the neutron-rich Cd isotopes are treated in detail. It is shown that a strong redistribution of the Gamow-Teller strength due to the PPC is mostly sensitive to the multi-neutron emission probability of the Cd isotopes.

    Comments:
    10 pages, 6 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1611.07542 [pdf]
    PRC(2017)·13 citations
  2. 02

    [Submitted on 22 Nov 2016]

    Geometrical Clusterization in SU(2) gluodynamics and Liquid-gas Phase Transition

    A. I. Ivanytskyi🇺🇦 · K. A. Bugaev🇺🇦 · V. V. Sagun🇺🇦 · D. R. Oliinychenko🇺🇦

    The liquid droplet formula is applied to an analysis of the properties of geometrical (anti)clusters formed in SU(2) gluodynamics by the Polyakov loops of the same sign. Using this approach, we explain the phase transition in SU(2) gluodynamics as a transition between two liquids during which one of the liquid droplets (the largest cluster of a certain Polyakov loop sign) experiences a condensation, while another droplet (the next to the largest cluster of the opposite sign of Polyakov loop) evaporates. The clusters of smaller sizes form two accompanying gases, which behave oppositely to their liquids. The liquid droplet formula is used to analyze the size distributions of the gas (anti)clusters. The fit of these distributions allows us to extract the temperature dependence of surface tension and the value of Fisher topological exponent for both kinds of gaseous clusters. It is shown that the surface tension coeficient of gaseous (anti)clusters can serve as an order parameter of the deconfinement phase transition in SU(2) gluodynamics. The Fisher topological exponent of (anti)clusters is found to have the same value . This value disagrees with the famous Fisher droplet model, but it agrees well with an exactly solvable model of nuclear liquid-gas phase transition. This finding may evidence for the fact that the SU(2) gluodynamics and this exactly solvable model of nuclear liquid-gas phase transition are in the same universality class.

    Comments:
    6 pages, 5 figures, proceedings of WDS 2016 Conference
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1611.07569 [pdf]
    0 citations
  3. 03

    [Submitted on 23 Nov 2016]

    Effective potential for relativistic scattering

    Mahmut Elbistan🇨🇳 · Pengming Zhang🇨🇳 · Janos Balog🇨🇳

    We consider quantum inverse scattering with singular potentials and calculate the Sine-Gordon model effective potential in the laboratory and centre-of-mass frames. The effective potentials are frame dependent but closely resemble the zero-momentum potential of the equivalent Ruijsenaars-Schneider model.

    Comments:
    23 pages, 5 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Theory (hep-th)
    arXiv:
    1611.07923 [pdf]
    PTEP(2017)·3 citations
  4. 04

    [Submitted on 23 Nov 2016]

    Structure of C and O nuclei within a five-cluster model

    B. E. Grinyuk · D. V. Piatnytskyi

    Within a five-particle model (three -particles plus two nucleons), the structure functions of mirror nuclei C and O are studied. Using the variational approach with Gaussian bases, the energies and wave functions are calculated for these five-particle systems. Two spatial configurations in the ground-state wave function are revealed. The r.m.s. charge radius of O nucleus is found to be fm. The charge density distributions and the form factors of both nuclei are predicted. The pair correlation functions are analyzed, and the r.m.s. relative distances are calculated. The momentum distributions of particles are found.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1611.07949 [pdf]
    0 citations

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