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Nuclear Theory·nucl-th

Thursday·March 14, 2024

12 papers—4 primary·8 cross-listed

All12Primary4Cross-lists8
  1. 01

    Electron scattering on He from coupled-cluster theory

    Joanna E. Sobczyk

    We present a coupled-cluster calculation for the electron-He scattering in the region of the quasi-elastic peak. We show the longitudinal and transverse responses separately, and discuss results within two distinct theoretical methods: the Lorentz integral transform and spectral functions. The comparison between them allows to investigate the role of final state interactions, two-body currents and relativistic effects.

    nucl-thFew Body Syst.(2024)·2 citations
  2. 02

    Opportunities and open questions in modern decay

    Leendert Hayen🇫🇷

    For well over half a century, precision studies of neutron and nuclear decays have been at the forefront of searches for exotic electroweak physics. Recent advances in nuclear ab initio theory and the widespread use of effective field theories means that its modern understanding is going through a transitional phase. This has been propelled by current tensions in the global data set leading to renewed scrutiny of its theoretical ingredients. In parallel, a host of novel techniques and methods are being investigated that are able to sidestep many traditional systematic uncertainties and require a diverse palette of skills and collaboration with material science and condensed matter physics. We highlight the current opportunities and open questions with the aim of facilitating the transition to a more modern understanding of decay.

    nucl-thnucl-exAnn.Rev.Nucl.Part.Sci.(2024)·18 citations
  3. 03

    Effect of the charge asymmetry and orbital angular momentum in the entrance channel on the hindrance to complete fusion

    Elzod Khusanov (1,2,3) · Avazbek Nasirov (1,4) · Mukhtorali Nishonov (2) ((1) Institute of Nuclear Physics, (2) Faculty of Physics, National University of Uzbekistan, (3) Institute of Theoretical Physics, (4) Joint Institute for Nuclear Research)

    The hindrance to complete fusion is studied as a function of the charge asymmetry of colliding nuclei and orbital angular momentum of the collision. The formation and evolution of a dinuclear system (DNS) in the heavy ion collisions at energies near the Coulomb barrier is calculated in the framework of the DNS model. The DNS evolution is considered as nucleon transfer between its fragments. The results prove that a hindrance at formation of a compound nucleus (CN) is related with the quasifission process which is breakup of the DNS into products instead to reach the equilibrated state of the CN. The role of the angular momentum in the charge (mass) distribution of the reaction products for the given mass asymmetry of the colliding nuclei has been demonstrated. The results of this work have been compared with the measured data for the quasifission yields in the C+Pb and Ca+Er reactions to show the role of the mass asymmetry of the entrance channel.

    nucl-thPRC(2024)·5 citations
  4. 04

    Nuclear coherent photoproduction with charge-exchange and spin-flip rescattering

    Viacheslav Tsaran🇩🇪 · Marc Vanderhaeghen🇩🇪

    In this work, we present an updated model for nuclear photoproduction, which incorporates pion second-order rescattering on intermediate excited nuclear states. Our approach is based on the distorted wave impulse approximation in momentum space. The many-body medium effects are incorporated in the complex effective self-energy, employing the results of the recently developed second-order pion-nucleus scattering potential. The experimental data for C and Ca are successfully described without the need to fit the model parameters of the photoproduction amplitude as a result of incorporating the second-order part of nuclear photoproduction potential, which involves intermediate nucleon spin-flip and charge exchange.

    nucl-thhep-phPRC(2024)·4 citations

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first authorsco-authorsvia INSPIRE