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Nuclear Theory·nucl-th

Monday·April 21, 2025

6 papers—3 primary·3 cross-listed

All6Primary3Cross-lists3
  1. 01

    Refinement of an analytical capture cross section formula

    Ning Wang

    An analytical formula with high accuracy is proposed for a systematic description of the capture cross sections at near-barrier energies from light to superheavy reaction systems. Based on the empirical barrier distribution (EBD) method, three key input quantities are refined by introducing nuclear surface correction to the Coulomb parameter for calculating the barrier height, incorporating the reaction -value and shell correction into the barrier distribution width calculations, and considering the deep inelastic scattering effects of superheavy systems on the barrier radius. With these refinements, not only the accuracy of the calculated barrier height but also the accuracy of the predicted capture cross sections, is substantially improved. The average deviation (in logarithmic scale) between the predicted cross sections and the experimental data for a total of 426 reaction systems with is sharply reduced from 3.485 to 0.113.

    nucl-thnucl-exCPC(2025)·3 citations
  2. 02

    Charge radii and their deformation correlation for even- nuclei in deformed relativistic Hartree-Bogoliubov theory in continuum

    C. Pan · J. Meng

    The systematics are investigated for the charge radii of the even- nuclei with calculated by the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) with the functional PC-PK1, and their deformation correlation is explored. The available data of the charge radius are reproduced with a root-mean-square deviation fm. In particular, for the nuclei between the closed shells, the descriptions of the charge radii are remarkably improved by including the deformation. Taking molybdenum isotopes as examples, both the evolutions of the charge radius and deformation are well reproduced. It is found that while the charge radius typically increases with the deformation, there also exist different cases. For example, in Sg, the charge radius of the deformed ground state is smaller than the one of the spherical state, and the largest binding energy does not necessarily correspond to the smallest charge radius. The increase or decrease of the charge radii with deformation is related to specific shell structures, particularly the key single-particle levels near the Fermi energy.

    nucl-thPRC(2025)·13 citations
  3. 03

    Productions of H, H and He in different coalescence channels in Au-Au collisions at GeV

    Rui-Qin Wang🇨🇳 · Jun Song🇨🇳 · Mao-Yan Wu🇨🇳 · Huai-Tong Xue🇨🇳 · Feng-Lan Shao🇨🇳

    We study the productions of -hypernuclei H, H and He in the coalescence mechanism in Au-Au collisions at GeV. Considering the abundance and great importance of baryons and light (hyper-)nuclei on the collision dynamics, we include not only nucleon coalescence but also nucleus+nucleon() coalescence. We present contributions from different coalescence channels for H, H and He in their productions. We predict the production asymmetry between H and He, characterized by yield ratios and , which can shed light on the existence constraints of the possible neutron- bound states and .

    nucl-thhep-exhep-phnucl-exPRC(2025)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE