Geometrical Relationships of Macroscopic Nuclear Physics

Hasse, Rainer W.; Myers, William D.

doi:10.1007/978-3-642-83017-4

Cited by 296 publications

(202 citation statements)

References 6 publications

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“…We have suspected for a while the validity of the assumption that the emission of the fission fragments was isotropic in the center-of-mass, which, as said in section 2.11, was used to determine the transmission correction factor. We have made a carefull simulation of this effect with the INCL4/ABLA code, which provides the angular momentum at the end of the INC stage, deducing the corresponding anisotropies from [50,51]. Although the resulting anisotropy is non negligible in the system of the fissioning nucleus, the effect is completely washed out because the directions of the recoil velocity and of the angular momentum of the nucleus after the INC stage fluctuate very much.…”

Section: Total Fission Cross-sectionmentioning

confidence: 99%

Nuclide cross-sections of fission fragments in the reaction 208Pb + p at 500 A MeV

et al. 2005

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The isotopic distributions and recoil velocities of the fission fragments produced in the spallation reaction 208 P b + p at 500 A MeV have been measured using the inverse-kinematics technique, a lead beam onto a liquid-hydrogen target, and the high-resolution spectrometer FRS at GSI. The shapes of the different distributions are found in good agreement with previously published data while the deduced total fission cross-section is higher than expected from existing systematics and some previous measurements. From the experimental data, the characteristics of the average fissioning system can be reconstructed in charge, mass and excitation energy, and the average number of post-fission neutrons can be inferred. The results are also compared to different models describing the spallation reaction. The intranuclear cascade code INCL4 followed by the de-excitation code ABLA is shown to describe reasonably well the evolution of the isotopic distribution shapes between 500 and 1000 A MeV.

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Section: Total Fission Cross-sectionmentioning

confidence: 99%

Nuclide cross-sections of fission fragments in the reaction 208Pb + p at 500 A MeV

et al. 2005

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“…At the ground state, F 2 and F 3 are equal to 1, as we assume no deformation of the nucleus. To take into account the effects of deformation at the saddle point, we use again the parametrisation done by Hasse and Meyer [25],…”

Section: Level Density Parametermentioning

confidence: 99%

KEWPIE: A dynamical cascade code for decaying exited compound nuclei

Bouriquet

Abe

Boilley

2004

Computer Physics Communications

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A new dynamical cascade code for decaying hot nuclei is proposed and specially adapted to the synthesis of super-heavy nuclei. For such a case, the interesting channel is the tiny fraction that will decay through particles emission, thus the code avoids classical Monte-Carlo methods and proposes a new numerical scheme. The time dependence is explicitely taken into account in order to cope with the fact that fission decay rate might not be constant. The code allows to evaluate both statistical and dynamical observables. Results are successfully compared to experimental data.

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“…[1][2][3][4][5]. These phenomenological models, often augmented by a shell correction which is calculated using average single-particle potentials, have been tuned up to describe nuclear bulk properties to a high precision.…”

Section: Introductionmentioning

confidence: 99%

From finite nuclei to the nuclear liquid drop: Leptodermous expansion based on self-consistent mean-field theory

et al. 2006

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The parameters of the nuclear liquid drop model, such as the volume, surface, symmetry, and curvature constants, as well as bulk radii, are extracted from the nonrelativistic and relativistic energy density functionals used in microscopic calculations for finite nuclei. The microscopic liquid drop energy, obtained self-consistently for a large sample of finite, spherical nuclei, has been expanded in terms of powers of A −1/3 (or inverse nuclear radius) and the isospin excess (or neutron-to-proton asymmetry). In order to perform a reliable extrapolation in the inverse radius, the calculations have been carried out for nuclei with huge numbers of nucleons, of the order of 10 6 . The Coulomb interaction has been ignored to be able to approach nuclei of arbitrary sizes and to avoid radial instabilities characteristic of systems with very large atomic numbers. The main contribution to the fluctuating part of the binding energy has been removed using the Green's function method to calculate the shell correction. The limitations of applying the leptodermous expansion to actual nuclei are discussed. While the leading terms in the macroscopic energy expansion can be extracted very precisely, the higher-order, isospin-dependent terms are prone to large uncertainties due to finite-size effects.

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Geometrical Relationships of Macroscopic Nuclear Physics

Cited by 296 publications

References 6 publications

Nuclide cross-sections of fission fragments in the reaction 208Pb + p at 500 A MeV

Nuclide cross-sections of fission fragments in the reaction 208Pb + p at 500 A MeV

KEWPIE: A dynamical cascade code for decaying exited compound nuclei

From finite nuclei to the nuclear liquid drop: Leptodermous expansion based on self-consistent mean-field theory

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