scholarly journals Effects of the neutron spin-orbit density on the nuclear charge density in relativistic models

2000 ◽  
Vol 62 (5) ◽  
Author(s):  
Haruki Kurasawa ◽  
Toshio Suzuki
Keyword(s):  
Charge Density ◽  
Nuclear Charge ◽  
Neutron Spin ◽  
Spin Orbit ◽  
Relativistic Models

Charge density differences nearPb208in relativistic models

1991 ◽  
Vol 44 (2) ◽  
pp. 895-898 ◽  
Author(s):  
R. J. Furnstahl ◽  
C. E. Price
Keyword(s):  
Charge Density ◽  
Relativistic Models

scholarly journals The nth-order moment of the nuclear charge density and contribution from the neutrons

2019 ◽  
Vol 2019 (11) ◽  
Author(s):  
Haruki Kurasawa ◽  
Toshio Suzuki
Keyword(s):  
Charge Density ◽  
Electron Scattering ◽  
Nuclear Charge ◽  
Order Moment ◽  
Proton Density ◽  
Neutron Density ◽  
Mean Square ◽  
Relativistic Expression ◽  
The Mean ◽  
The Difference

Abstract The relativistic expression for the $n$th-order moment of the nuclear charge density is presented. For the mean square radius (msr) of the nuclear charge density, the non-relativistic expression, which is equivalent to the relativistic one, is also derived consistently up to $1/M^2$ with use of the Foldy–Wouthuysen transformation. The difference between the relativistic and non-relativistic expressions for the msr of the point proton density is also discussed. The $n(\ge 4)$th-order moment of the nuclear charge density depends on the point neutron density. The fourth-order moment yields useful information on the msr of the point neutron density, and is expected to play an important role in electron scattering off neutron-rich nuclei.

Untersuchung zur externen Spin-Bahn-Kopplung bei aromatischen Molekülen / External Spin-Orbit-Coupling in Aromatic Molecules

1976 ◽  
Vol 31 (7) ◽  
pp. 748-753
Author(s):  
J. Friedrich ◽  
G. Weinzierl ◽  
F. Dörr
Keyword(s):  
Nuclear Charge ◽  
Heavy Atom ◽  
Orbit Coupling ◽  
Coupling Mechanism ◽  
Intermolecular Distance ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Overlap Integrals ◽  
Aromatic Molecules ◽  
Atom Effect

Abstract The influence of ethylhalogenes on the polarization of the phosphorescence of naphthalene was studied by means of the photoselection technique. It is shown that with increasing concentration and with increasing nuclear charge of the heavy atom the phosphorescence of naphthalene becomes increasingly depolarized. The influence of the external heavy atom on the Tx- and Tz- substate is stronger than on the Ty-substate. From the concentration dependence of the depolarizatign conclusions concerning the mechanism of the external spin-orbit-coupling are drawn. The dirept spin-orbit-coupling mechanism is ruled out. In the model discussed the variation of the external heavy atom effect with the intermolecular distance is related to overlap integrals.

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