Higher Order Core Polarization Contributions to the Effective Interaction in 42Ca – 42Sc

1973 ◽  
Vol 51 (21) ◽  
pp. 2275-2282 ◽  
Author(s):  
A. M. Jopko ◽  
Donald W. L. Sprung
Keyword(s):  
Numerical Calculation ◽  
Effective Interaction ◽  
Closed Shell ◽  
Higher Order ◽  
Core Polarization ◽  
Polarization Contribution ◽  
The Core ◽  
The One

A numerical calculation of the core polarization of the effective interaction between nucléons outside the 40Ca closed shell has been carried out, taking account of several higher order processes suggested by Kirson. These are a systematic inclusion of particle–hole scattering, self-screening of phonons, and modification of the one-particle to two-particle, one-hole vertex. These processes have the same effect as in the earlier calculation for 16O; namely, the final result is a very small net core polarization contribution to the effective interaction, which cannot explain the low-lying spectra.

High Temperature NMR Study of 51V and 195Pt in the V3Pt Compound

1984 ◽  
Vol 39 (2) ◽  
pp. 145-147
Author(s):  
R. Rünger ◽  
D. Ploumbidis
Keyword(s):  
High Temperature ◽  
Temperature Dependence ◽  
Knight Shift ◽  
Core Polarization ◽  
Temperature Coefficients ◽  
Polarization Contribution ◽  
The Core ◽  
Nmr Study

Measurements of both the 51V and 195Pt Knight shift in the V3Pt compound are reported for temperatures ranging from 300 K to about 1300 K. The temperature coefficients of the Knight shift and the NMR linewidth have been determined. An interpretation of the observations is given in the frame of a model which is based on the temperature dependence of the core polarization contribution to the total Knight shift.

Some Extensions of the Schematic Model for Core Polarization of the Nuclear Effective Interaction

1972 ◽  
Vol 50 (22) ◽  
pp. 2768-2775 ◽  
Author(s):  
Donald W. L. Sprung ◽  
A. M. Jopko
Keyword(s):  
Shell Model ◽  
Effective Interaction ◽  
Higher Order ◽  
Schematic Model ◽  
Small Contribution ◽  
Core Polarization

A number of higher order core polarization processes recently considered by Kirson are here treated in the case of the soluble schematic model. We confirm the conclusion of Kirson that the sum of all the processes considered gives a very small contribution to the shell model effective interaction. In particular, the anomalously large results found in the RPA are disposed of.

Influence of relativistic valence-core correlation on p-state fine structure in some univalent systems

1981 ◽  
Vol 59 (6) ◽  
pp. 769-774 ◽  
Author(s):  
J. Migdalek ◽  
W. E. Baylis
Keyword(s):  
Fine Structure ◽  
Valence Electron ◽  
Closed Shell ◽  
Polarization Potential ◽  
Atomic Core ◽  
Hartree Fock ◽  
The Core ◽  
Ab Initio Approach ◽  
The One ◽  
Single Configuration

Single-configuration relativistic Hartree–Fock values of fine-structure separations are calculated for p-levels in systems with a single electron outside a closed-shell core, both with and without allowance for relaxation and polarization of the core. Effects of the polarization of the atomic core by the valence electron are included by the addition of a polarization potential to the one-electron Hamiltonian. The results obtained generally compare well with available experimental data and indicate a significant influence of core polarization on fine-structure splittings. Contributions of the relaxation of the core are considerable only for the heavier systems. The choice of the cut-off parameter r0 in the polarization potential, as well as of the shape of the cut-off function, and the success of the ab initio approach are discussed. It is suggested that for indium and thallium, in contrast to the case for rubidium, silver, and gold, the simplified picture of a core plus a single valence electron is no longer entirely satisfactory.

Knight Shift in the V3Ga Compound at High Temperatures

1984 ◽  
Vol 39 (2) ◽  
pp. 201-202
Author(s):  
R. Rünger ◽  
D. Ploumbidis
Keyword(s):  
Temperature Dependence ◽  
High Temperatures ◽  
Knight Shift ◽  
Entire Range ◽  
Temperature Dependent ◽  
Core Polarization ◽  
Polarization Contribution ◽  
The Core ◽  
Model Based ◽  
Dependent Term

The temperature dependence of the Knight shift of both 51V and 71Ga in the V3Ga compound has been measured over the entire range from 300 K to 1300 K. The results are discussed using a model based on the assumption that the core polarization contribution to the total Knight shift is the temperature dependent term.

scholarly journals Investigation of the Quadrupole Moment and Form Factors of Some Ca Isotopes

2020 ◽  
Vol 17 (2) ◽  
pp. 0502 ◽  
Author(s):  
Ahmed H Ali
Keyword(s):  
Effective Interaction ◽  
Form Factors ◽  
Electric Quadrupole ◽  
Quadrupole Moments ◽  
Matrix Elements ◽  
Calcium Isotopes ◽  
The Core ◽  
Effective Charges ◽  
The One ◽  
Nuclear Shell

Nuclear shell model is adopted to calculate the electric quadrupole moments for some Calcium isotopes 20Ca (N = 21, 23, 25, and 27) in the fp shell. The wave function is generated using a two body effective interaction fpd6 and fp space model. The one body density matrix elements (OBDM) are calculated for these isotopes using the NuShellX@MSU code. The effect of the core-polarizations was taken through the theory microscopic by taking the set of the effective charges. The results for the quadrupole moments by using Bohr-Mottelson (B-M) effective charges are the best. The behavior of the form factors of some Calcium isotopes was studied by using Bohr-Mottelson (B-M) effective charges.

The Salvage of Ideas: Schumpeter and the Core Problems Still Confronting Economics

2003 ◽  
pp. 15-26
Author(s):  
P. Wynarczyk
Keyword(s):  
The Other ◽  
The Core ◽  
Other Hand ◽  
The One

Two aspects of Schumpeter' legacy are analyzed in the article. On the one hand, he can be viewed as the custodian of the neoclassical harvest supplementing to its stock of inherited knowledge. On the other hand, the innovative character of his works is emphasized that allows to consider him a proponent of hetherodoxy. It is stressed that Schumpeter's revolutionary challenge can lead to radical changes in modern economics.

AFRICAN WOMEN AND FORBIDDEN GROUNDS: FEMALE SEXUALITY AND SELF-DETERMINATION IN AFRICAN LITERATURE

Imbizo ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 40-54
Author(s):  
Oyeh O. Otu
Keyword(s):  
Female Sexuality ◽  
Sense Of Self ◽  
African Literature ◽  
The Other ◽  
Self Determination ◽  
African Women ◽  
The Core ◽  
The Many ◽  
The One ◽  
Sexual Repression

This article examines how female conditioning and sexual repression affect the woman’s sense of self, womanhood, identity and her place in society. It argues that the woman’s body is at the core of the many sites of gender struggles/ politics. Accordingly, the woman’s body must be decolonised for her to attain true emancipation. On the one hand, this study identifies the grave consequences of sexual repression, how it robs women of their freedom to choose whom to love or marry, the freedom to seek legal redress against sexual abuse and terror, and how it hinders their quest for self-determination. On the other hand, it underscores the need to give women sexual freedom that must be respected and enforced by law for the overall good of society.

Evaluation of Road Utilisation as Space For Holding Social Ceremonies in Indigenous Residential Area of Ogbomoso, Nigeria

2018 ◽  
Vol 1 (March 2018) ◽  
Author(s):  
S.A Okanlawon ◽  
O.O Odunjo ◽  
S.A Olaniyan
Keyword(s):  
Transport Infrastructure ◽  
Noisy Environment ◽  
Policy Makers ◽  
The Core ◽  
Local Roads ◽  
Strict Enforcement ◽  
The Mean ◽  
The One ◽  
The City ◽  
The Town

This study examined Residents’ evaluation of turning transport infrastructure (road) to spaces for holding social ceremonies in the indigenous residential zone of Ogbomoso, Oyo State, Nigeria. Upon stratifying the city into the three identifiable zones, the core, otherwise known as the indigenous residential zone was isolated for study. Of the twenty (20) political wards in the two local government areas of the town, fifteen (15) wards that were located in the indigenous zone constituted the study area. Respondents were selected along one out of every three (33.3%) of the Trunk — C (local) roads being the one mostly used for the purpose in the study area. The respondents were the residents, commercial motorists, commercial motorcyclists, and celebrants. Six hundred and forty-two (642) copies of questionnaire were administered and harvested on the spot. The Mean Analysis generated from the respondents’ rating of twelve perceived hazards listed in the questionnaire were then used to determine respondents’ most highly rated perceived consequences of the practice. These were noisy environment, Blockage of drainage by waste, and Endangering the life of the sick on the way to hospital; the most highly rated reasons why the practice came into being; and level of acceptability of the practice which was found to be very unacceptable in the study area. Policy makers should therefore focus their attention on strict enforcement of the law prohibiting the practice in order to ensure more cordial relationship among the citizenry, seeing citizens’ unacceptability of the practice in the study area.

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