Adiabatic time-dependent Hartree-Fock theory with the Skyrme interaction

1991 ◽  
Vol 43 (6) ◽  
pp. 2663-2669 ◽  
Author(s):  
A. K. Mukherjee
Keyword(s):  
Time Dependent ◽  
Skyrme Interaction ◽  
Hartree Fock

scholarly journals TIME-DEPENDENT HARTREE-FOCK DESCRIPTION OF HEAVY IONS FUSION

2008 ◽  
Vol 17 (01) ◽  
pp. 31-40 ◽  
Author(s):  
CÉDRIC SIMENEL ◽  
BENOÎT AVEZ
Keyword(s):  
Excitation Function ◽  
Heavy Ions ◽  
Mean Field ◽  
Time Dependent ◽  
Skyrme Interaction ◽  
Hartree Fock ◽  
The Mean ◽  
Good Agreement

A microscopic mean-field description of heavy ions fusion is performed in the framework of the Time-Dependent Hartree-Fock (TDHF) theory using a Skyrme interaction with the SLy 4d parametrization. A good agreement with experiments is obtained on the position of the fusion barriers for various total masses, mass asymmetries and deformations. The excitation function of the 16 O +208 Pb is overestimated by about 16% above the barrier. The restriction to an independent particles state in the mean-field dynamics prevents the description of sub-barrier fusion. Effect of transfer on fusion is discussed.

DIPOLE RESPONSE IN NEUTRON-RICH MAGNESIUM

2006 ◽  
Vol 15 (07) ◽  
pp. 1417-1423 ◽  
Author(s):  
M. P. BRINE ◽  
P. D. STEVENSON ◽  
J. A. MARUHN ◽  
P.-G. REINHARD
Keyword(s):  
Major Axis ◽  
Time Dependent ◽  
Surface Mode ◽  
Skyrme Interaction ◽  
Hartree Fock ◽  
Bulk Motion ◽  
Dipole Response ◽  
Fully Coupled ◽  
Dependent Density

The time-dependent Hartree-Fock method, using the Skyrme interaction, is used to study the isovector giant dipole response of neutron-rich 34 Mg . The response is separately examined along the major and minor axes of this prolate nucleus, with a pygmy-like peak in the direction of the major axis at around 10 MeV. Time-dependent density plots show a superimposed surface mode not fully coupled to the bulk motion.

scholarly journals Theoretical and experimental comparative studies of nonlinear optical properties for selected melaminium compounds

2010 ◽  
Vol 8 (6) ◽  
pp. 1192-1202 ◽  
Author(s):  
Marek Drozd ◽  
Mariusz Marchewka
Keyword(s):  
Optical Properties ◽  
Acetic Acid ◽  
Nonlinear Optical ◽  
Time Dependent ◽  
X Ray ◽  
Hartree Fock ◽  
Optical Applications ◽  
Experimental Values ◽  
Nonlinear Optical Applications ◽  
Theoretical Results

AbstractThe bis(melaminium) sulphate dihydrate, 2,4,6-triamine-1,3,5-triazin-1,3-ium tartrate monohydrate, 2,4,6-triamine-1,3,5-triazin-1-ium hydrogenphthalate, 2,4,6-triamine-1,3,5-triazin-1-ium acetate acetic acid solvate monohydrate, 2,4,6-triamine-1,3,5-triazin-1-ium bis(selenate) trihydrate, melaminium diperchlorate hydrate, melaminium bis(trichloroacetate) monohydrate and melaminium bis(4-hydroxybenzenesulphonate) dihydrate were discovered recently as perspective materials for nonlinear optical applications. On the basis of X-ray structures for eight melaminium compounds the time dependent Hartree Fock (TDHF) method was used for calculation of the polarizability, and first and second hyperpolarizability. Detailed directional studies of calculated hyperpolarizability for all investigated melaminium compounds are shown. The theoretical results are compared with experimental values of β.

scholarly journals RELATIVE MOTION CORRECTION TO FISSION BARRIERS

2008 ◽  
Vol 17 (01) ◽  
pp. 151-159 ◽  
Author(s):  
J. SKALSKI
Keyword(s):  
Relative Motion ◽  
Cluster Model ◽  
Motion Correction ◽  
Mean Field Theory ◽  
Mean Field ◽  
Ternary Fission ◽  
Skyrme Interaction ◽  
Hartree Fock ◽  
Fission Barriers ◽  
The Mean

We discuss the effect of kinetic energy of the relative motion becoming spurious for separate fragments on the selfconsistent mean-field fission barriers. The treatment of the relative motion in the cluster model is contrasted with the necessity of a simpler and approximate approach in the mean-field theory. A scheme of the energy correction to the Hartree-Fock is proposed. The results obtained with the effective Skyrme interaction SLy 6 show that the correction, previously estimated as ~ 8 MeV in A = 70 - 100 nuclei, amounts to 4 MeV in the medium heavy nucleus 198 Hg and to null in 238 U . However, the corrected barrier implies a shorter fission half-life of the latter nucleus. The same effect is expected to lower barriers for multipartition (i.e. ternary fission, etc) and make hyperdeformed minima less stable.

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