Self-Consistent Study of Fission Barriers of Even-Even Superheavy Nuclei

2005 ◽  
Author(s):  
A. Staszczak
Keyword(s):  
Superheavy Nuclei ◽  
Fission Barriers ◽  
Self Consistent

STRUCTURE OF SUPERHEAVY NUCLEI WITH THE GOGNY FORCE

2004 ◽  
Vol 13 (01) ◽  
pp. 79-86 ◽  
Author(s):  
J. F. BERGER ◽  
D. HIRATA ◽  
M. GIROD ◽  
J. DECHARGE
Keyword(s):  
Recent Work ◽  
Alpha Decay ◽  
Superheavy Nuclei ◽  
Α Decay ◽  
Fission Barriers ◽  
Self Consistent ◽  
Shell Gaps

This contribution summarizes the predictions obtained in the domain of superheavy nuclei from self-consistent microscopic calculations employing the Gogny force. Results concerning shell gaps, fission barriers and stability against alpha-decay are recalled. Recent work involving α-decay chains in odd nuclides is also presented and discussed.

FISSION BARRIERS OF SUPERHEAVY NUCLEI IN THE SKYRME-HARTREE-FOCK MODEL

2006 ◽  
Vol 15 (02) ◽  
pp. 302-310 ◽  
Author(s):  
ANDRZEJ STASZCZAK ◽  
JACEK DOBACZEWSKI ◽  
WITOLD NAZAREWICZ
Keyword(s):  
Axial Symmetry ◽  
Degrees Of Freedom ◽  
Mean Field ◽  
Superheavy Nuclei ◽  
Reflection Symmetry ◽  
Pairing Force ◽  
Hartree Fock ◽  
Fission Barriers ◽  
Self Consistent

Constrained Skyrme-Hartree-Fock calculations of static fission barriers are performed for even-even elements with Z = 100÷110 as well as for superheavy N=184 isotones. In our study we use the Skyrme parametrization SLy4 and a seniority pairing force treated in the BCS approximation. The computations are carried out applying a code that makes it possible to break all self-consistent symmetries of the nuclear mean field, including axial symmetry and reflection symmetry. The influence of reflection-asymmetric and triaxial degrees of freedom on fission barriers are discussed.

Fission Barriers of Superheavy Nuclei from Self-Consistent Mean-Field Models

2002 ◽  
Vol 16 (1-4) ◽  
pp. 275-280
Author(s):  
T. Bürvenich ◽  
M. Bender ◽  
P.-G. Reinhard ◽  
J.A. Maruhn
Keyword(s):  
Mean Field ◽  
Superheavy Nuclei ◽  
Mean Field Models ◽  
Fission Barriers ◽  
Self Consistent

SKYRME–HARTREE–FOCK CALCULATIONS OF FISSION BARRIERS OF THE HEAVIEST AND SUPERHEAVY NUCLEI

2005 ◽  
Vol 14 (03) ◽  
pp. 395-402 ◽  
Author(s):  
ANDRZEJ STASZCZAK ◽  
JACEK DOBACZEWSKI ◽  
WITOLD NAZAREWICZ
Keyword(s):  
Degrees Of Freedom ◽  
Superheavy Nuclei ◽  
Pairing Force ◽  
Hartree Fock ◽  
Fission Barriers ◽  
Self Consistent

Self-consistent Skyrme–Hartree–Fock (SHF) calculations of static fission barriers are presented for even-even Fermium isotopes as well as for superheavy even-even N=184 isotones. In the particle-hole channel, we use the SLy4 Skyrme parametrization, while in the particle-particle channel we take a T=1 seniority pairing force treated in the BCS approximation. The influence of reflection-asymmetric and triaxial degrees of freedom on the static fission paths are investigated.

Self-Consistent Mean-Field Models and Their Application to Superheavy Nuclei

2004 ◽  
pp. 407-414
Author(s):  
T. J. Bürvenich ◽  
P.-G. Reinhard ◽  
J. A. Maruhn ◽  
W. Greiner
Keyword(s):  
Mean Field ◽  
Superheavy Nuclei ◽  
Mean Field Models ◽  
Self Consistent

scholarly journals FURTHER MICROSCOPIC STUDIES OF THE FISSION BARRIERS OF HEAVY NUCLEI

2012 ◽  
Vol 21 (05) ◽  
pp. 1250051 ◽  
Author(s):  
T. V. NHAN HAO ◽  
J. LE BLOAS ◽  
MENG-HOCK KOH ◽  
L. BONNEAU ◽  
P. QUENTIN
Keyword(s):  
Spontaneous Fission ◽  
The Self ◽  
Fission Barrier ◽  
Heavy Nuclei ◽  
Barrier Heights ◽  
Fission Barriers ◽  
Self Consistent ◽  
Microscopic Studies ◽  
Mean Fields ◽  
Approximate Treatment

Two systematic sources of error in most current microscopic evaluations of fission-barrier heights are studied. They are concerned with an approximate treatment of the Coulomb exchange terms (known as the Slater approximation) in the self-consistent mean-fields and the projection on good parity states (e.g., of positive parity for the spontaneous fission of an even–even nucleus) of left–right reflection asymmetric intrinsic solutions (e.g., around the second barrier). Approximate or unprojected solutions are shown to lead each to an underestimation of the barrier heights by a few hundred keV.

Fission barriers for even-even superheavy nuclei

2010 ◽  
Vol 82 (1) ◽  
Author(s):  
M. Kowal ◽  
P. Jachimowicz ◽  
A. Sobiczewski
Keyword(s):  
Superheavy Nuclei ◽  
Fission Barriers

COMPETING MINIMA AND NON-AXIAL SADDLES IN SUPERHEAVY NUCLEI

2010 ◽  
Vol 19 (04) ◽  
pp. 508-513 ◽  
Author(s):  
P. JACHIMOWICZ ◽  
M. KOWAL ◽  
J. SKALSKI
Keyword(s):  
Saddle Points ◽  
Ground States ◽  
Superheavy Nuclei ◽  
Dimensional Manifold ◽  
Energy Landscapes ◽  
Microscopic Method ◽  
Effective Interactions ◽  
Mass Asymmetry ◽  
Self Consistent ◽  
Stark Contrast

Energy landscapes of superheavy even-even nuclei with 116 ≤ Z ≤ 126 and 176 ≤ N ≤ 184 are studied within the macroscopic-microscopic method over a 12 dimensional manifold of shapes, including both axial- and mass-asymmetry. In addition to the spherical, prolate and oblate minima we find also oblate-octupole minima, with Y33 symmetry along the oblateness axis, that compete to become ground states. All fission saddle points are triaxial and by 0.5-2.5 MeV lower than the axial ones. The Woods-Saxon model predicts the abrupt lowering of barriers near Z = 126, in a stark contrast to the mostly used self-consistent effective interactions.

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