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Nuclear Theory·nucl-th

Monday·November 4, 2019

9 papers—4 primary·5 cross-listed

All9Primary4Cross-lists5
  1. 01

    Table of electronic factors for E0 electron and electron-positron pair conversion transitions

    J.T.H. Dowie · T. Kibédi · T.K. Eriksen · A.E. Stuchbery

    A new tabulation of electronic factors is reported for electron conversion for elements of Z from 5 to 126 and electronic factors for electron-positron pair conversion for elements of even Z from 4 to 100. The electronic factors for electron conversion, (E0), were calculated using a modified version of the CATAR program developed by Pauli and Raff with a relativistic-Hartree-Fock-Slater approach (Pauli and Raff, 1975). The electronic factors for electron-positron pair conversion, (E0), were calculated using the model developed by Wilkinson (1969). The data tables presented here cover all atomic shells up to R2 and transition energies from 1 keV to 6000 keV and from 1100 keV to 8000 keV for pair conversion. A comparison with previous electronic factor tabulations is presented. Ratios of experimental {\Omega}(E0) values for 83 E0 transitions in 8Z98 are compared to this tabulation. Two examples of how to use the tabulation to extract E0 strengths are also included.

    nucl-thAtom.Data Nucl.Data Tabl.(2020)·21 citations
  2. 02

    Electric-dipole transitions in Li with a fully microscopic six-body calculation

    W. Horiuchi · S. Satsuka

    Exploring new excitation modes and the role of the nuclear clustering has been of great interest. An interesting speculation was made in the recent photoabsorption measurement of Li that implied the importance of the nuclear clustering. To understand the excitation mechanism of Li, we perform a fully microscopic six-body calculation on the electric-dipole () transitions and discuss how Li is excited by the field as a function of the excitation energy. We show the various cluster components in the six-body wave functions and discuss the role of the nuclear clustering in the excitations of Li.

    nucl-thSciPost Phys.Proc.(2020)·1 citation
  3. 03

    Influence of resonances on the 11B(n,g)12B capture reaction rate. II. Capture to the first excited state of 12B

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

    Within the framework of the modified potential cluster model with a classification of orbital states according to Young diagrams, the possibility of prediction absentee experimental data for the total cross sections of the radiative neutron capture on 11B to the first excited state 12B at 0.95 MeV (2+) for reaction energy of 10 meV (1 meV = 10-3 eV) to 7 MeV. The reaction rate in the temperature range of 0.01 to 10.0 T9 is calculated on the basis of obtained cross sections, which take into account resonances up to 5 MeV. It is shown that low-lying resonances exercise a significant influence to the capture reaction rate. The approximation of the calculation reaction rate is carried out by the simple analytic formula.

    nucl-th3 citations
  4. 04

    Charmed hadron chemistry in relativistic heavy-ion collisions

    Shanshan Cao🇺🇸 · Kai-Jia Sun🇺🇸 · Shu-Qing Li🇨🇳 · Shuai Y.F. Liu🇺🇸 · Wen-Jing Xing🇨🇳 · Guang-You Qin🇨🇳 · Che-Ming Ko🇺🇸

    We develop for charmed hadron production in relativistic heavy-ion collisions a comprehensive coalescence model that includes an extensive set of and -wave hadronic states as well as the strict energy-momentum conservation, which ensures the boost invariance of the coalescence probability and the thermal limit of the produced hadron spectrum. By combining our hadronization scheme with an advanced Langevin-hydrodynamics model that incorporates both elastic and inelastic energy loss of heavy quarks inside the dynamical quark-gluon plasma, we obtain a successful description of the -integrated and differential and ratios measured at RHIC and the LHC. We find that including the effect of radial flow of the medium is essential for describing the enhanced ratio observed in relativistic heavy-ion collisions. We also find that the puzzling larger ratio observed in Au+Au collisions at RHIC than in Pb+Pb collisions at the LHC is due to the interplay between the effects of the QGP radial flow and the charm quark transverse momentum spectrum at hadronization. Our study further suggests that charmed hadrons have larger sizes in medium than in vacuum.

    nucl-thhep-phnucl-exPLB(2020)·73 citations

Affiliations

first authorsco-authorsvia INSPIRE