EFFECT OF TENSOR INTERACTION ON HEAVY AND SUPERHEAVY NUCLEI

2010 ◽  
Vol 25 (21n23) ◽  
pp. 1809-1813 ◽  
Author(s):  
XIAN-RONG ZHOU ◽  
HIROYUKI SAGAWA
Keyword(s):  
Single Particle ◽  
Shell Structure ◽  
Spherical Shape ◽  
Tensor Interaction ◽  
Superheavy Nuclei ◽  
Hartree Fock ◽  
Heavy And Superheavy Nuclei ◽  
Large Shell ◽  
Particle Spectra ◽  
Shell Gaps

The effect of tensor interaction is discussed on the deformation and the shell structure of heavy and superheavy nuclei within the deformed Skyrme Hartree-Fock+BCS model. The importance of the tensor correlations is shown for the single particle spectra of protons in 249 Bk . The large shell gaps of superheavy nuclei are found at Z = 114 and Z = 120 for protons and N = 184 for neutrons with the spherical shape irrespective of the tensor correlations. It is also shown that Z = 114 and N = 164 shell gaps are more pronounced by the tensor correlations in the case of SLy 5+ T interaction.

DETAILED INVESTIGATION OF THE TENSOR FORCE ON THE EVALUATION OF THE SINGLE PARTICLE LEVELS OF Z = 28 AND Z = 82 NUCLEI

2013 ◽  
Vol 28 (38) ◽  
pp. 1350177 ◽  
Author(s):  
E. YÜKSEL ◽  
Ç GÖK ◽  
K. BOZKURT
Keyword(s):  
Single Particle ◽  
Shell Structure ◽  
Crucial Role ◽  
Tensor Force ◽  
Tensor Interaction ◽  
Spin Orbit ◽  
Isotopic Chain ◽  
Pairing Energy ◽  
Hartree Fock

In this work, effects of tensor force on the evaluation of shell structure of Z = 28 and Z = 82 isotopes are investigated in the framework of Hartree–Fock+BCS approach. Skyrme type SLy5 and SIII interactions are used with and without tensor interaction. The effect of tensor force on the gap evaluation, single particle energies and spin-orbit splittings of the selected isotopic chain are presented. Pairing energy results are also discussed. It is shown that tensor force plays a crucial role in the evaluation of the single particle states and changing spin-orbit splittings of Nickel and Lead isotopic chain.

Empirical formula for mass excess of heavy and superheavy nuclei

2016 ◽  
Vol 31 (28) ◽  
pp. 1650162 ◽  
Author(s):  
H. C. Manjunatha ◽  
B. M. Chandrika ◽  
L. Seenappa
Keyword(s):  
Empirical Formula ◽  
Superheavy Nuclei ◽  
Mass Excess ◽  
Hartree Fock ◽  
Heavy And Superheavy Nuclei ◽  
Polynomial Fit ◽  
Calculated Mass ◽  
Model Independent ◽  
Experimental Values ◽  
Good Agreement

A new empirical formula is proposed for mass excess of heavy and superheavy nuclei in the region Z = 96–129. The parameters of the formula are obtained by making a polynomial fit to the available theoretical and experimental data. The calculated mass excess values are compared with the experimental values and other results of the earlier proposed models such as finite range droplet model (FRDM) and Hartree–Fock–Bogoliubov (HFB) method. Standard deviation of calculated mass excess values for each atomic number is tabulated. The good agreement of present formula with the experiment and other models suggests that the present formula could be used to evaluate the mass excess values of heavy and superheavy nuclei in the region 96[Formula: see text][Formula: see text][Formula: see text]Z[Formula: see text][Formula: see text][Formula: see text]129. This formula is a model-independent formula and is first of its kind that produces a mass excess values with the only simple inputs of only Z and A.

scholarly journals Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around Hs-270

2021 ◽  
Author(s):  
Xiao-Qian Wang ◽  
Xiang-Xiang Sun ◽  
Shan-Gui 周善贵 Zhou
Keyword(s):  
Single Particle ◽  
Mean Field ◽  
Higher Order ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Effective Interactions ◽  
Relativistic Mean Field ◽  
Order Deformation ◽  
Particle Spectra ◽  
Rmf Model

Abstract We study the effects of higher-order deformations βλ (λ = 4,6,8, and 10) on the ground state properties of superheavy nuclei (SHN) near the deformed doubly magic nucleus 270Hs by using the multidimensionally-constrained (MDC) relativistic mean-field (RMF) model with five effective interactions PC-PK1, PK1, NL3∗, DD-ME2, and PKDD. The doubly magic properties of 270Hs are featured by the large energy gaps at N = 162 and Z = 108 in the single-particle spectra. By investigating the binding energies and single-particle levels of270Hs in multidimensional deformation space, we find that the deformation β6 has the greatest impact on the binding energy among these higher-order deformations and influences the shell gaps considerably. Similar conclusions hold for other SHN near 270Hs. Our calculations demonstrate that the deformation β6 must be considered when studying SHN by using MDC-RMF.

EFFECTS OF SHELL STRUCTURE IN REACTIONS LEADING TO HEAVY AND SUPERHEAVY NUCLEI

2002 ◽  
Author(s):  
G. GIARDINA ◽  
G. FAZIO ◽  
A. LAMBERTO ◽  
R. RUGGERI ◽  
A. TACCONE ◽  
...  
Keyword(s):  
Shell Structure ◽  
Superheavy Nuclei ◽  
Heavy And Superheavy Nuclei

PROPERTIES OF HEAVIEST NUCLEI AT THE SADDLE-POINT CONFIGURATION

2010 ◽  
Vol 19 (05n06) ◽  
pp. 1055-1063 ◽  
Author(s):  
A. SOBICZEWSKI ◽  
P. JACHIMOWICZ ◽  
M. KOWAL
Keyword(s):  
Saddle Point ◽  
Neutron Number ◽  
Shell Correction ◽  
Superheavy Nuclei ◽  
Deformation Space ◽  
Microscopic Approach ◽  
Main Attention ◽  
Point Configuration ◽  
Heavy And Superheavy Nuclei ◽  
Large Shell

Properties of heaviest nuclei at their saddle point are studied in a multidimensional deformation space. The main attention is given to deformation and the shell correction to energy of the nuclei at this point. The analysis is performed within a macroscopic-microscopic approach. A 10-dimensional deformation space is used. A large number of about 300 even-even heavy and superheavy nuclei with proton number 98 ≤ Z ≤ 126 and neutron number 134 ≤ N ≤ 192 are considered. Detailed results are illustrated for nuclei of the element 120. A large shell correction (up to about 7 MeV) is found for these nuclei. For most of them, the correction is larger than the height of the barrier, itself, as the macroscopic contribution to this height is negative.

Single-Particle States of Heavy and Superheavy Nuclei in a Velocity-Dependent Potential

1972 ◽  
Vol 27 (12) ◽  
pp. 1862-1863
Author(s):  
M. A. K. Lodhi
Keyword(s):  
Experimental Data ◽  
Single Particle ◽  
Closed Shell ◽  
Particle Energy ◽  
Superheavy Nuclei ◽  
Single Particle Energy ◽  
Energy Calculations ◽  
Effective Velocity ◽  
Heavy And Superheavy Nuclei ◽  
Dependent Potential

AbstractSingle-particle energy calculations have been performed for some closed shell heavy and superheavy nuclei using a form of an effective velocity-dependent nucleon-nucleus potential. Results are compared with other calculations and experimental data wherever available.

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