A NEW LOOK AT SUPER HEAVY NUCLEI

2008 ◽  
Vol 22 (25n26) ◽  
pp. 4511-4523 ◽  
Author(s):  
G. S. ANAGNOSTATOS
Keyword(s):  
Shell Model ◽  
Binding Energies ◽  
Magic Numbers ◽  
Heavy Nuclei ◽  
Charge Radii ◽  
Super Heavy Nuclei ◽  
New Look

A new look at super heavy nuclei is attempted by employing the Isomorphic shell Model or, in different wording, the Multiharmonic Shell Model. After 208 Pb the same magic numbers, like the conventional Shell Model, are predicted, i.e., at Z = 126 and N = 184. Good results for charge radii and binding energies for a sample of nuclei are also presented.

scholarly journals Systematic shell-model study on spectroscopic properties from light to heavy nuclei

2018 ◽  
Vol 178 ◽  
pp. 02016
Author(s):  
Cenxi Yuan
Keyword(s):  
Shell Model ◽  
Energy Levels ◽  
Spectroscopic Properties ◽  
Energy Difference ◽  
Binding Energies ◽  
Electromagnetic Properties ◽  
Heavy Nuclei ◽  
Weakly Bound ◽  
Model Study ◽  
Special Case

A systematic shell-model study is performed to study the spectroscopic properties from light to heavy nuclei, such as binding energies, energy levels, electromagnetic properties, and β decays. The importance of cross-shell excitation is shown in the spectroscopic properties of neutron-rich boron, carbon, nitrogen, and oxygen isotopes. A special case is presented for low-lying structure of 14C. The weakly bound effect of proton 1s1/2 orbit is necessary for the description of the mirror energy difference in the nuclei around A=20. Some possible isomers are predicted in the nuclei in the southeast region of 132Sn based on a newly suggested Hamiltonian. A preliminary study on the nuclei around 208Pb are given to show the ability of the shell model in the heavy nuclei.

Multiharmonic Nuclear Hamiltonian in the Region 120 < A ≤ 140

1998 ◽  
Vol 07 (05) ◽  
pp. 585-591
Author(s):  
J. Giapitzakis ◽  
P. Ginis ◽  
A. N. Antonov ◽  
S. E. Massen ◽  
G. S. Anagnostatos
Keyword(s):  
Harmonic Oscillator ◽  
Shell Model ◽  
Binding Energies ◽  
Charge Radii ◽  
Experimental Values

The isomorphic shell model is successfully applied for all the 30 stable nuclei with 50 < Z ≤ 58 and 70 < N ≤ 82 (i.e., with 120 < A ≤ 140). The model employs a multiharmonic Hamiltonian in contrast to single harmonic-oscillator Hamiltonian of the conventional shell model. Derived binding energies and charge radii are in very good agreements with the corresponding experimental values without using adjustable parameters.

scholarly journals Isoscalar giant monopole resonance for drip-line and super heavy nuclei in the framework of relativistic mean field formalism with scaling calculation

Open Physics ◽  
2014 ◽  
Vol 12 (8) ◽  
Author(s):  
Subrata Biswal ◽  
Suresh Patra
Keyword(s):  
Excitation Energy ◽  
Mean Field Theory ◽  
Mean Field ◽  
Magic Numbers ◽  
Heavy Nuclei ◽  
Isotopic Chain ◽  
Excitation Energies ◽  
Relativistic Mean Field ◽  
Giant Monopole Resonance ◽  
Super Heavy Nuclei

AbstractWe study the isoscalar giant monopole resonance for drip-lines and super heavy nuclei in the framework of relativistic mean field theory with a scaling approach. The well known extended Thomas-Fermi approximation in the nonlinear σ-ω model is used to estimate the giant monopole excitation energy for some selected light spherical nuclei starting from the region of proton to neutron drip-lines. The application is extended to the super heavy region for Z=114 and 120, which are predicted by several models as the next proton magic numbers beyond Z=82. We compared the excitation energy obtained by four successful force parameters NL1, NL3, NL3*, and FSUGold. The monopole energy decreases toward the proton and neutron drip-lines in an isotopic chain for lighter mass nuclei, in contrast to a monotonic decrease for super heavy isotopes. The maximum and minimum monopole excitation energies are obtained for nuclei with minimum and maximum isospin in an isotopic chain, respectively.

scholarly journals ENERGY SYSTEMATICS OF HEAVY NUCLEI — MEAN FIELD MODELS IN COMPARISON

2011 ◽  
Vol 20 (06) ◽  
pp. 1379-1390 ◽  
Author(s):  
P.-G. REINHARD ◽  
B. K. AGRAWAL
Keyword(s):  
Mean Field ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Heavy Nuclei ◽  
Hartree Fock ◽  
Relativistic Mean Field ◽  
Mean Field Models ◽  
Opposite Trend ◽  
Super Heavy Nuclei ◽  
Rmf Model

We compare the systematics of binding energies computed within the standard and extended versions of the relativistic mean-field (RMF) model and the Skyrme–Hartree–Fock (SHF) model. The general trends for the binding energies for super-heavy nuclei are significantly different for these models. The SHF models tend to underbind the superheavy nuclei, while RMF models show just the opposite trend. The extended RMF model seems to provide remarkable improvements over the results obtained for the standard RMF model.

RELATIVISTIC NUCLEAR ENERGY DENSITY FUNCTIONALS

2010 ◽  
Vol 19 (04) ◽  
pp. 548-557 ◽  
Author(s):  
D. VRETENAR ◽  
T. NIKŠIĆ ◽  
P. RING
Keyword(s):  
Energy Density ◽  
Degrees Of Freedom ◽  
Nuclear Energy ◽  
Effective Interaction ◽  
Binding Energies ◽  
Large Set ◽  
Density Functionals ◽  
Heavy Nuclei ◽  
Interaction Terms ◽  
Range Dynamics

A class of relativistic nuclear energy density functionals is explored, in which only nucleon degrees of freedom are explicitly used in the construction of effective interaction terms. Short-distance correlations, as well as intermediate and long-range dynamics, are encoded in the nucleon-density dependence of the strength functionals of an effective interaction Lagrangian. The resulting phenomenological effective interaction, adjusted to experimental binding energies of a large set of axially deformed nuclei, together with a new separable pairing interaction adjusted to reproduce the pairing gap in nuclear matter calculated with the Gogny force, is applied in triaxial relativistic Hartree-Bogoliubov calculations of sequences of heavy nuclei: Th , U , Pu , Cm , Cf , Fm , and No .

BIMODAL FISSION IN 258FM

1986 ◽  
Vol 01 (06) ◽  
pp. 377-381 ◽  
Author(s):  
K. DEPTA ◽  
J.A. MARUHN ◽  
W. GREINER ◽  
W. SCHEID ◽  
A. SANDULESCU
Keyword(s):  
Kinetic Energy ◽  
Shell Model ◽  
Fission Products ◽  
Degree Of Freedom ◽  
Total Kinetic Energy ◽  
Heavy Nuclei ◽  
Energy Distributions ◽  
Decay Channels ◽  
Symmetric Fission ◽  
Kinetic Energy Distributions

Within the 2-center shell model we present an explanation for the mass and total-kinetic-energy distributions of fission products of very heavy nuclei called “bimodal fission.” For the case of 258 FM we show that the symmetric fission can be described by a 2-dimensional treatment of the elongation and neck degree of freedom. Owing to shell corrections the system fissions via two decay channels that have distinct kinetic energies.

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