PaperPanorama
FAQ

Nuclear Theory·nucl-th

Thursday·September 26, 2019

10 papers—7 primary·3 cross-listed

All10Primary7Cross-lists3
  1. 08

    Radial dose distribution and effective delta ray radius (Penumbra radius): Determination for some ions passing through water

    E. M. Awad a · M. Abu-Shady

    An analytical equation for calculating radial dose of heavy ions in water is introduced by Awad et al. (Applied Radiation and Isotopes, 142 (2018) 135-142. It is simple alternative to Monte Carlo code and is a promising code, however, still needs refinement. Refinement was added through adjusting radial dose integration upper limit which gives the effective delta-ray range, rmax and ions penumbra radius in water as well. Radial dose distributions for 85 ions forming fifteen energy groups from 0.25 to 24 MeV/n were studied. By employing the effective delta-ray range, it was possible to get more consistent radial dose distribution in comparison to experimental and Monte Carlo simulation data. The corresponding LET values of those ions were estimated and compared with SRIM program. Penumbra radii for 85 ions were determined. Good description for the penumbra radii was obtained using a proposed new equation which fits experimental data as well.

    ↳ physics.ins-detnucl-thphysics.med-phNucl.Instrum.Meth.B(2020)·2 citations
  2. 09

    Energy, angular momentum and pressure force distributions inside nucleons

    Cédric Lorcé (Ecole Polytechnique and CNRS)🇫🇷

    We review some of the recent developments regarding mass, angular momentum and pressure forces inside hadrons. These properties are all encoded in the energy-momentum tensor of the system, which is described at the non-perturbative level in terms of gravitational form factors. Similarly to electromagnetic form factors, Fourier transforms of gravitational form factors allow one to map out the distribution of the above mechanical properties in position space, providing a whole new way of studying in detail the internal structure of hadrons.

    ↳ hep-phnucl-thJ.Phys.Conf.Ser.(2020)·1 citation
  3. 10

    Spin-dipole mode in a trapped Fermi gas near unitarity

    Hiroyuki Tajima · Alessio Recati · Yoji Ohashi

    We theoretically investigate the spin-dipole oscillation of a strongly interacting Fermi gas in a harmonic trap. By using a combined diagrammatic strong-coupling theory with a local density approximation and a sum rule approach, we clarify the temperature dependence of the spin-dipole frequency near the unitarity, which is deeply related to the spin susceptibility, as well as pairing correlations. While the spin-dipole frequency exactly coincides with the trap frequency in a non-interacting Fermi gas, it is shown to remarkably be enhanced in the superfluid state, because of the suppression of the spin degree of freedom due to the spin-singlet Cooper-pair formation. In strongly interacting Fermi gases, this enhancement occurs even above the superfluid phase transition temperature, due to the strong pairing correlations.

    ↳ cond-mat.quant-gasnucl-thPRA(2020)·1 citation

Affiliations

first authorsco-authorsvia INSPIRE