scholarly journals High-K Isomers in Light Superheavy Nuclei by PNC-CSM method

2018 ◽  
Vol 178 ◽  
pp. 02024
Author(s):  
Xiao-Tao He
Keyword(s):  
Mass Region ◽  
Rotational Frequency ◽  
Superheavy Nuclei ◽  
Particle State ◽  
Microscopic Mechanism ◽  
High K ◽  
Order Deformation ◽  
State Band ◽  
Configuration Mixing ◽  
K Isomers

The high-K isomeric states in light superheavy nuclei around A = 250 mass region are investigated by the Cranked Shell Model (CSM) with pairing treated by a Particle-Number Conserving (PNC) method. With including the higher-order deformation ε6, both of the high–K multi-particle state energies and the rotational bands in 254No and N = 150 isotone are reproduced well. The isomeric state energies and the microscopic mechanism of kinematic moment of inertia variations versus rotational frequency are discussed. The irregularity of the two-neutron Kπ = 8- state band at ħω ≈ 0:17 in 252No is caused by the configuration mixing with the two-proton Kπ = 8- band. .

scholarly journals Searching for high- K isomers in the proton-rich A ∼ 80 mass region

2016 ◽  
Vol 40 (9) ◽  
pp. 094102 ◽  
Author(s):  
Zhi-Jun Bai ◽  
Chang-Feng Jiao ◽  
Yuan Gao ◽  
Fu-Rong Xu
Keyword(s):  
Mass Region ◽  
High K ◽  
K Isomers

Superheavy nuclei IX: 1300 ≤ A < 1400 systems

2021 ◽  
Vol 34 (1) ◽  
pp. 54-60
Author(s):  
J. J. Bevelacqua
Keyword(s):  
Mass Region ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Enhanced Stability

Binding energies of nuclei are calculated in the mass region 1300 ≤ A < 1400. The calculations are performed using the adjusted Rost interaction, which suggests that a new island of stability exists for Z = 382 and in neighboring systems. Enhanced stability occurs in the <mml:math display="inline"> <mml:mrow> <mml:msubsup> <mml:mrow/> <mml:mn mathvariant="bold"> 382</mml:mn> <mml:mn mathvariant="bold">1344</mml:mn> </mml:msubsup> <mml:msub> <mml:mi mathvariant="bold">X</mml:mi> <mml:mrow> <mml:mn mathvariant="bold">962</mml:mn> </mml:mrow> </mml:msub> </mml:mrow> </mml:math> system.

REVIEW ON THEORETICAL STUDIES OF SUPERHEAVY NUCLEI

2006 ◽  
Vol 15 (07) ◽  
pp. 1587-1599 ◽  
Author(s):  
ZHONGZHOU REN ◽  
DINGHAN CHEN ◽  
CHANG XU
Keyword(s):  
Ground State ◽  
Large Mass ◽  
Mass Region ◽  
Superheavy Nuclei ◽  
Theoretical Studies ◽  
Shape Coexistence ◽  
Good Test ◽  
Α Decay ◽  
The Stability ◽  
Theoretical Results

Superheavy elements have provided a good test of the validity of both nuclear structure models and nuclear decay models in a large mass region. We firstly review the recent progress on theoretical studies of superheavy nuclei. Emphasis is placed on the structure and decay of superheavy nuclei. Then theoretical results of odd-odd nuclei with Z = 109 - 115 are presented and discussed. It is clearly demonstrated that there is shape coexistence for the ground state of many superheavy nuclei from different models and many superheavy nuclei are deformed. In some cases superdeformation can become the ground state of superheavy nuclei and it is important for future studies of superheavy nuclei. This can lead to the existence of low-energy isomers in the superheavy region and it plays an important role for the stability of superheavy nuclei. As α-decay and spontaneous fission plays a crucial role for identifications of new elements, we also review some typical models of α-decay half-lives and spontaneous fissions half-lives. Some new views on superheavy nuclei are presented.

Superheavy nuclei VIII: 1200≤A < 1300 systems

2020 ◽  
Vol 33 (3) ◽  
pp. 276-282
Author(s):  
J. J. Bevelacqua
Keyword(s):  
Mass Region ◽  
Binding Energies ◽  
Superheavy Nuclei ◽  
Enhanced Stability

Binding energies of nuclei are calculated in the mass region 1200 ≤ A < 1300. The calculations are performed using the adjusted Rost interaction, which suggests that a new island of stability exists for Z = 354 and neighboring systems. Enhanced stability occurs in the <mml:math display="inline"> <mml:mrow> <mml:mmultiscripts> <mml:mi mathvariant="bold">X</mml:mi> <mml:mprescripts/> <mml:mrow> <mml:mn> </mml:mn> <mml:mn>354</mml:mn> </mml:mrow> <mml:mrow> <mml:mn>1226</mml:mn> </mml:mrow> </mml:mmultiscripts> <mml:msub> <mml:mrow/> <mml:mn>872</mml:mn> </mml:msub> </mml:mrow> </mml:math> system.

scholarly journals High-K isomers: some of the questions

2016 ◽  
Vol 123 ◽  
pp. 01001
Author(s):  
P. M. Walker
Keyword(s):  
High K ◽  
K Isomers

scholarly journals Hindered α decays of heaviest high- K isomers

2018 ◽  
Vol 98 (1) ◽  
Author(s):  
P. Jachimowicz ◽  
M. Kowal ◽  
J. Skalski
Keyword(s):  
High K ◽  
K Isomers

TRIAXIAL REFLECTION ASYMMETRIC SHELL MODEL

2008 ◽  
Vol 17 (supp01) ◽  
pp. 146-158 ◽  
Author(s):  
Y. S. CHEN ◽  
Z. C. GAO
Keyword(s):  
Shell Model ◽  
Transition Probabilities ◽  
Mean Field ◽  
Negative Parity ◽  
Laboratory Frame ◽  
Superheavy Nuclei ◽  
Tetrahedral Symmetry ◽  
State Band ◽  
Natural Way ◽  
Good Agreement

The spontaneously broken reflection and axial symmetries in the nuclear mean field and their necessary restorations in the laboratory frame are described in a natural way in the triaxial Reflection Asymmetric Shell Model. This recently developed theoretical model has been applied to explore the possibility that some superheavy nuclei may have an exotic shape, tetrahedral-like. The ground state band and the partner low-lying negative parity bands are calculated for the Cf isotopes and the results are in a good agreement with the available experimental data. The tetrahedral symmetry, realized at the first order with the nonaxial octupole Y 32 deformation, plays an important role for understanding the low-lying band structures in transfermium and superheavy nuclei, but it is significantly obscured by the competing quadrupole deformation as well as the axial octupole component. The calculated reduced E3 transition probabilities between the low lying 2–-band states and the ground band states show a large enhancement of the nonaxial octupole collectivity.

scholarly journals Quasi-particle and collective magnetism: Rotation, pairing and blocking in high-K isomers

2013 ◽  
Vol 726 (4-5) ◽  
pp. 675-679 ◽  
Author(s):  
N.J. Stone ◽  
J.R. Stone ◽  
P.M. Walker ◽  
C.R. Bingham
Keyword(s):  
Quasi Particle ◽  
High K ◽  
K Isomers
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