Investigation of the shell structure of 40 ⩽ A ⩽ 132 magic and near-magic nuclei within the mean-field model involving a dispersive optical potential

2009 ◽  
Vol 72 (10) ◽  
pp. 1629-1638 ◽  
Author(s):  
O. V. Bespalova ◽  
I. N. Boboshin ◽  
V. V. Varlamov ◽  
T. A. Ermakova ◽  
B. S. Ishkhanov ◽  
...  
Keyword(s):  
Shell Structure ◽  
Optical Potential ◽  
Field Model ◽  
Mean Field ◽  
Mean Field Model ◽  
Dispersive Optical Potential ◽  
The Mean

Calculation of single-particle energies in the 38 96 Sr nucleus within the mean field model with the dispersive optical potential

2009 ◽  
Vol 73 (11) ◽  
pp. 1442-1445 ◽  
Author(s):  
O. V. Bespalova ◽  
I. N. Boboshin ◽  
V. V. Varlamov ◽  
B. S. Ishkhanov ◽  
E. A. Romanovskii ◽  
...  
Keyword(s):  
Single Particle ◽  
Optical Potential ◽  
Field Model ◽  
Mean Field ◽  
Mean Field Model ◽  
Dispersive Optical Potential ◽  
The Mean

EVOLUTION OF SHELL STRUCTURE IN NUCLEI

2011 ◽  
Vol 20 (08) ◽  
pp. 1663-1675 ◽  
Author(s):  
A. BHAGWAT ◽  
Y. K. GAMBHIR
Keyword(s):  
Shell Structure ◽  
Crucial Role ◽  
Field Model ◽  
Mean Field ◽  
Mass Region ◽  
The Other ◽  
Mean Field Model ◽  
Relativistic Mean Field ◽  
Shell Closures ◽  
Low Mass

Systematic investigations of the pairing and two-neutron separation energies which play a crucial role in the evolution of shell structure in nuclei, are carried out within the framework of relativistic mean-field model. The shell closures are found to be robust, as expected, up to the lead region. New shell closures appear in low mass region. In the superheavy region, on the other hand, it is found that the shell closures are not as robust, and they depend on the particular combinations of neutron and proton numbers. Effect of deformation on the shell structure is found to be marginal.

Single-Crystal Magnetic Properties of [Co(NH3)5(OH2)] [Cr(CN)6] Between 2 and 300 K

1992 ◽  
Vol 45 (11) ◽  
pp. 1899 ◽  
Author(s):  
PA Reynolds ◽  
CD Delfs ◽  
BN Figgis ◽  
B Moubaraki ◽  
KS Murray
Keyword(s):  
Ising Model ◽  
Field Model ◽  
Mean Field ◽  
Zero Field ◽  
Spin Orbit Coupling ◽  
Zero Field Splitting ◽  
Magnetic Exchange Interaction ◽  
Mean Field Model ◽  
Magnetic Exchange ◽  
The Mean

The magnetic susceptibilities along and perpendicular to the c axis (hexagonal setting) between 2.0 and 300 K at a magnetic field of 1.00 T, and the magnetizations at field strengths up to 5.00 T, are presented for single crystals of [Co(NH3)5(OH2)] [Cr(CN)6]. The results are interpreted in terms of zero-field splitting (2D) of the ground 4A2g term by spin-orbit coupling and of magnetic exchange interaction between the chromium atoms. The magnetic exchange is modelled as one of Ising or mean-field in type. The exchange is found to be quite small: J = -0.18(6) cm-1 if the Ising model is employed, and -0.03(1) cm-1 for the mean-field model. The model adopted for the exchange has a strong influence on the value of the parameter D obtained. When the Ising model is used D is deduced to be -0.28(9) cm-l; when the mean-field model is used D is -0.14(4) cm-l. The g-values deduced are in agreement with those from e.s.r. measurements at higher temperatures and do not depend on the exchange model. In any case, D is found to be sufficiently large that it must be considered in a polarized neutron diffraction experiment on the compound.

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