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Nuclear Theory·nucl-th

Thursday·February 20, 2020

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 01

    [Submitted on 19 Feb 2020]

    First Excited 2+ Energy State Estimations of Even-even Nuclei by Using Artificial Neural Networks

    S. Akkoyun · H. Kaya · Y.Torun

    The first excited 2+ energy states of nuclei give many substantial information related to the nuclear structure. Including these levels, all excited states of nuclei are shown regularities in spin, parity and energy. In the even-even nuclei, the first excited state is generally 2+ and the energy values of them increase as the closed shells are approached. The excited levels in nuclei can be investigated by using theoretical nuclear models such nuclear shell model. In the present study for the first time, we have used artificial neural networks for the determination of the energies of first 2+ states in the even-even nuclei in nuclidic chart as a function of Z, N and A numbers. We have used adopted literature values for the estimations. According to the results, the method is convenient for this goal and one can confidently use the method for the determination of first 2+ state energy values whose experimental values do not exist in the literature.

    Comments:
    14 pages, 4 figures and 1 table
    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    2002.08218 [pdf]
    Indian J.Phys.(2022)·13 citations
  2. 02

    [Submitted on 19 Feb 2020]

    Exclusive final state hadron observables from neutrino-nucleus multi-nucleon knockout

    J. E. Sobczyk🇪🇸 · J. Nieves🇪🇸 · F. Sánchez🇨🇭

    We present results of an updated calculation of the 2p2h (two particle two hole) contribution to the neutrino-induced charge-current cross section. We provide also some exclusive observables, interesting from the point of view of experimental studies, e.g. distributions of momenta of the outgoing nucleons and of available energy, which we compare with the results obtained within the NEUT generator. We also compute, and separate from the total, the contributions of 3p3h mechanisms. Finally, we discuss the differences between the present results and previous implementations of the model in MC event-generators, done at the level of inclusive cross sections, which might significantly influence the experimental analyses, particularly in the cases where the hadronic observables are considered.

    Comments:
    15 pages, 9 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    2002.08302 [pdf]
    PRC(2020)·41 citations

Affiliations

first authorsco-authorsvia INSPIRE