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Nuclear Theory·nucl-th

Friday·March 24, 2023

8 papers—5 primary·3 cross-listed

All8Primary5Cross-lists3
  1. 01

    [Submitted on 23 Mar 2023]

    Effects of magnetic field on the evolution of energy density fluctuations

    Shreyansh S. Dave🇮🇳 · Subrata Pal🇮🇳

    We study the effects of a static and uniform magnetic field on the evolution of energy density fluctuations present in a medium. By numerically solving the relativistic Boltzmann-Vlasov equation within the relaxation time approximation, we explicitly show that magnetic field can affect the characteristics of energy density fluctuations at the timescale the system achieves local thermodynamic equilibrium. A detailed momentum mode analysis of fluctuations reveals that magnetic field increases the damping of mode oscillations, especially for the low momentum modes. This leads to a reduction in the ultraviolet (high momentum) cutoff of fluctuations and also slows down the dissipation of relatively low momentum fluctuation modes. We discuss the phenomenological implications of our study on various sources of fluctuations in relativistic heavy-ion collisions.

    Comments:
    12 pages, 10 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); High Energy Physics — Theory (hep-th)
    arXiv:
    2303.13068 [pdf]
    PRD(2023)·1 citation
  2. 02

    [Submitted on 23 Mar 2023]

    Examination of promising reactions with Am and Cm targets for the synthesis of new superheavy elements within the dinuclear system model with a dynamical potential energy surface

    Xiang-Quan Deng · Shan-Gui Zhou

    Two actinide isotopes, Am and Cm, produced and chemically purified by the HFIR/REDC complex at ORNL are candidates for target materials of heavy-ion fusion reaction experiments for the synthesis of new superheavy elements (SHEs) with . In the framework of the dinuclear system model with a dynamical potential energy surface (DNS-DyPES model), we systematically study the Ca-induced reactions that have been applied to synthesize SHEs with --118, as well as the hot-fusion reactions with Am and Cm as targets which are promising for synthesizing new SHEs with --122. Detailed results including the maximal evaporation residue cross section and the optimal incident energy for each reaction are presented and discussed.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2303.13107 [pdf]
    PRC(2023)·20 citations
  3. 03

    [Submitted on 23 Mar 2023]

    Ground state and fission properties of even- uranium isotopes from multidimensionally-constrained relativistic mean field model

    Xiang-Quan Deng · Shan-Gui Zhou

    The multidimensionally-constrained covariant density functional theories (MDC-CDFTs) have been developed to study the influence of octupole and triaxial deformations on the ground state and fission properties. In this paper, we present a brief review of the applications of MDC-CDFTs and discuss the results of a systematical study of even- uranium isotopes with the MDC-RMF model which is one of MDC-CDFTs with pairing correlations treated by using the BCS approach. We examine in detail the two-dimensional potential energy surfaces of these U isotopes and discuss the ground state and fission properties as well as third and fourth minima on the potential energy surfaces. The emphasis is put on the effects of octupole and triaxial deformations.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2303.13118 [pdf]
    IJMPE(2023)·3 citations
  4. 04

    [Submitted on 23 Mar 2023]

    The least-squares analysis of the moments of the charge distribution in the mean-field models

    Toshio Suzuki

    Comparing the moments of the charge distribution in the mean-field models with experimental values from electron scattering, each value of the related moments of the point proton and neutron distributions is estimated in Ca, Ca and Pb by the least-squares analysis(LSA).

    Comments:
    37 pages, 25 figures
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2303.13135 [pdf]
    PTEP(2024)·3 citations
  5. 05

    [Submitted on 23 Mar 2023]

    Transparency of the reaction in nuclei

    Swapan Das🇮🇳

    The transparency of the hadrons produced in the reaction in nuclei is calculated using the Glauber model modified by including the Fermi motion of the nucleon in the nucleus. Since the calculated results underestimates the measured transparency for He nucleus, the Glauber model is further modified by incorporating the short-range correlation of the nucleon and the color transparency of the hadron in the nucleus. The nuclear transparency of the reaction is calculated for (c.m.) = 50, 70 and 90. The calculated results are compared with the data reported for He nucleus.

    Comments:
    First version: 11 pages, 2 figures. The reference of the final version is given below
    Subjects:
    Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
    arXiv:
    2303.13214 [pdf]
    PRC(2023)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE