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Nuclear Theory·nucl-th

Wednesday·April 29, 2020

8 papers—3 primary·5 cross-listed

All8Primary3Cross-lists5
  1. 01

    12B(n,gamma)13B reaction as alternative path to astrophysical synthesis of 13C isotope

    S.B. Dubovichenko · N.A. Burkova · A.V. Dzhazairov-Kakhramanov · A.Yertaiuly

    The total cross sections of the neutron radiative capture on 12B at astrophysical energies to the ground state of 13B have been calculated in the energy range of 10E-8 to 10 MeV within the framework of a modified potential cluster model with the classification of orbital states according to Young diagrams. Reaction rates in the temperature range of 0.01 to 10 T9 and their analytical parameterization were obtained. The calculated rates of 12B(n,gamma)13B excess the previous results by approximately to one order. Cross sections and reaction rates of 12C(n,gamma)13C are calculated and compared to the n10B, n11B, n12B, and p12C reaction rates. It is proposed that obtained rates of the 12B(n,gamma)13B reaction should be taken into account in novel scenarios of stable isotope 13C synthesis without of 12C hydrogen burning.

    nucl-thNPA(2021)·2 citations
  2. 02

    Ab initio calculations of low-energy nuclear scattering using confining potential traps

    Xilin Zhang🇺🇸 · S. R. Stroberg🇺🇸 · P.Navrátil🇨🇦 · Chan Gwak🇨🇦 · J. A. Melendez🇺🇸 · R. J. Furnstahl🇺🇸 · J. D. Holt🇨🇦

    A recently modified method to enable low-energy nuclear scattering results to be extracted from the discrete energy levels of the target-projectile clusters confined by harmonic potential traps is tested. We report encouraging results for neutron-- and neutron-- elastic scattering from analyzing the trapped levels computed using two different ab initio nuclear structure methods. The -- results have also been checked against a direct ab initio reaction calculation. The -- results demonstrate the approach's applicability for a large range of systems provided their spectra in traps can be computed by ab initio methods. A key ingredient is a rigorous understanding of the errors in the calculated energy levels caused by inevitable Hilbert-space truncations in the ab initio methods.

    nucl-thhep-latPRL(2020)·39 citations
  3. 03

    The Lagrange-mesh R-matrix method for inhomogenous equations

    Jin Lei🇮🇹 · Pierre Descouvemont🇧🇪

    The Lagrange-mesh -matrix method is generalized to inhomogeneous equations. This method is numerically stable and efficient. It can be directly used for transfer reactions with the formalism discussed by Ascuitto and Glendenning [Phys. Rev. 181,1396 (1969)] and for inclusive breakup reactions modeled by Ichimura, Austern, and Vincent [Phys. Rev. C 32, 431 (1985)]. We first present a simple example to assess the method. Then the application to the Nb(,) non-elastic breakup is discussed.

    nucl-thPRC(2020)·6 citations

Affiliations

first authorsco-authorsvia INSPIRE