Quasiparticle structure of superheavy nuclei along theα-decay chain of115288

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
A. N. Bezbakh ◽  
V. G. Kartavenko ◽  
G. G. Adamian ◽  
N. V. Antonenko ◽  
R. V. Jolos ◽  
...  
Keyword(s):  
Decay Chain ◽  
Superheavy Nuclei

TEST OF NL-RA1 RELATIVISTIC EFFECTIVE INTERACTION FOR THE STRUCTURE OF DEFORMED AND SUPERHEAVY NUCLEI

2012 ◽  
Vol 21 (06) ◽  
pp. 1250055 ◽  
Author(s):  
M. RASHDAN
Keyword(s):  
Effective Interaction ◽  
Mean Field Theory ◽  
Mean Field ◽  
Superheavy Element ◽  
Decay Chain ◽  
Alpha Decay ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Relativistic Mean Field ◽  
Relative Errors

The NL-RA1 effective interaction of the relativistic mean field theory is employed to study the structure of deformed and superheavy nuclei, using an axially deformed harmonic oscillator basis. It is found that a fair agreement with the experimental data is obtained for the binding energies (BE), deformation parameters and charge radii. Comparison with NL-Z2, NLSH and NL3 interactions show that NL-Z2 gives good binding but larger radii, while NL-SH gives good radii but larger binding. The NL-RA1 interaction is also tested for the new deformed superheavy element with Z≥98. Excellent agreement with the experimental binding is obtained, where the relative error in BEs of Cf, Fm, No, Rf, Sg and Ea (Z = 110) isotopes are found to be of the order ~0.1%. The NL3 predicted larger binding and larger relative errors ~0.2–0.5%. Furthermore, the experimental Q-values of the alpha-decay of the superheavy elements 270110, 288114 and 292116 are satisfactory reproduced by NL-RA1 interaction, where the agreement is much better than that predicted by the phenomenological mass FRDM model. Furthermore, the alpha-decay chain of element 294118 are also better reproduced by NL-RA1 interaction.

Half-Lives of Superheavy Nuclei in Z = 113 Alpha Decay Chain

2008 ◽  
Vol 25 (12) ◽  
pp. 4230-4232 ◽  
Author(s):  
Dong Jian-Min ◽  
Zhang Hong-Fei ◽  
Zuo Wei ◽  
Li Jun-Qing
Keyword(s):  
Decay Chain ◽  
Alpha Decay ◽  
Superheavy Nuclei

Prediction of alpha-decay energy and decay half-life for unknown superheavy nuclei using resonances of exactly solvable α+nucleus potential

2012 ◽  
Vol 90 (1) ◽  
pp. 53-60
Author(s):  
Arati Devi ◽  
Basudeb Sahu ◽  
I. Mehrotra
Keyword(s):  
Half Life ◽  
Resonance Energy ◽  
Theoretical Method ◽  
Decay Chain ◽  
Alpha Decay ◽  
Neutron Number ◽  
Superheavy Nuclei ◽  
Decay Energy ◽  
Q Value ◽  
Exactly Solvable

Predictions of the results of alpha-decay energy (Q-value) and decay half-life (t1/2) are made for experimentally unknown alpha decaying systems of superheavy nuclei. Following a theoretical method proposed recently by B. Sahu, the calculations are performed using the analytical expression of the potential that simulates the nuclear+Coulomb potential of the α + daughter nucleus system. The Q-value considered as resonance energy is calculated using the behavior of the wave function, and the t1/2 is expressed analytically using the exact solutions of the potential. A global formula for the potential parameter as a function of neutron number in a given isotopic chain of nuclei is developed for the calculation of Q and t1/2. Calculations of the latter two quantities are made for the decay chain of newly discovered superheavy elements 294117, 293117, and for the isotopic chains of Z = 74 and 102. Predictions of the same parameters are made for Z = 113 and some other still unknown superheavy nuclei. It is observed that the global formula works well in evaluating correct results of Q and t1/2 for various alpha emitters.

A comparative study of α-decay and spontaneous fission for Z = 120 superheavy isotopes

2020 ◽  
Vol 29 (05) ◽  
pp. 2050025
Author(s):  
S. A. Seyyedi
Keyword(s):  
Binding Energy ◽  
Comparative Study ◽  
Spontaneous Fission ◽  
Decay Chain ◽  
Superheavy Nuclei ◽  
Empirical Formulas ◽  
Α Decay ◽  
Hartree Fock ◽  
Effective Force ◽  
Semi Empirical

In this study, we have investigated the [Formula: see text]-decay chains of even–even superheavy nuclei [Formula: see text] in the range of [Formula: see text]. The Hartree–Fock–Bogoliubov model is used to calculate the binding energy of these superheavy nuclei. We have included the so-called SkP skyrme function as an effective force and the quadruple deformations. The semi-empirical formulas are used in the reproducing [Formula: see text]-decay and spontaneous fission half-lives of these superheavy nuclei. By studying the decay chains of the Z = 120 isotopes and comparing them with the half-lives of spontaneous fission, it is predicted that the elements [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text],[Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] are more stable than the neighboring isotopes in their parent [Formula: see text]-decay chain. The corresponding neutron and proton numbers represent magical behavior that is in agreement with the numbers predicted before. In this range, the predicted nuclei are found to have large enough half-lives to synthesize them in a laboratory.

PROPERTIES OF THE SUPERHEAVY NUCLEUS 294118 AND ITS α-DECAY CHAIN IN THE RELATIVISTIC MEAN FIELD THEORY

2008 ◽  
Vol 17 (07) ◽  
pp. 1309-1317
Author(s):  
FANG ZHOU ◽  
JIAN-YOU GUO
Keyword(s):  
Experimental Data ◽  
Ground State ◽  
Theoretical Calculations ◽  
Superheavy Nucleus ◽  
Mean Field ◽  
Decay Chain ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Α Decay ◽  
Relativistic Mean Field

The superheavy nucleus 294118 and its α-decay chain have been investigated systematically in the relativistic mean-field (RMF) theory with the interactions NL3, TMA, PK1 and NLZ. The properties of ground state have been described well with the binding energies per nucleon and α-decay energies, which are reproduced as compared with the experimental data. It shows that the RMF theory is effective for studying not only the stable nuclei but also the superheavy nuclei presented here. In particular, the prolate shape predicted in the ground state of these superheavy nuclei is in agreement with the experimental data as well as other theoretical calculations.

SINGLE-PARTICLE EFFECTS IN DECAY CHAINS OF ODD-A SUPERHEAVY NUCLEI

2006 ◽  
Vol 15 (02) ◽  
pp. 457-463 ◽  
Author(s):  
A. PARKHOMENKO ◽  
A. SOBICZEWSKI
Keyword(s):  
Single Particle ◽  
Decay Chain ◽  
Alpha Decay ◽  
Superheavy Nuclei ◽  
Microscopic Approach ◽  
Transition Energies ◽  
Free Parameters ◽  
The Absolute ◽  
The One ◽  
Good Agreement

Alpha-decay chain of 271 Ds (271110) is described theoretically. Transition energies [Formula: see text] and half-lives Tα are analyzed. The energies [Formula: see text] are described within a macroscopic-microscopic approach. Single-particle excitations of the nuclei are treated in the one-quasiparticle approximation. The half-lives Tα are described by a simple 3-parameter phenomenological formula expressing them as functions of [Formula: see text]. A good agreement with measured values is obtained. Average of the absolute values of the discrepancies for [Formula: see text] is 0.17 MeV. The half-lives Tα are reproduced within a factor of 3.8, on the average. No free parameters are used in the description.

Predictions for the α decay of superheavy nuclei of Z = 119 − 120 isotopes

2021 ◽  
pp. 122250
Author(s):  
Haitao Yang ◽  
Zhongxia Zhao ◽  
Xiaopan Li ◽  
Yan Cai ◽  
Xiaojun Bao
Keyword(s):  
Superheavy Nuclei ◽  
Α Decay
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