Effect of the exchange charge polarization on the photoelastic behaviour of diatomic crystals

1977 ◽  
Vol 55 (17) ◽  
pp. 1510-1511 ◽  
Author(s):  
J. C. Sharma ◽  
H. P. Sharma ◽  
Jai Shanker
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Alkali Halides ◽  
Dielectric Constants ◽  
Charge Polarization ◽  
Derivatives Of ◽  
Photoelastic Behaviour

An analysis of the photoelastic behaviour of diatomic crystals is presented on the basis of the shell model including the effect of exchange charge polarizations. The strain derivatives of the electronic polarizabilities and dielectric constants calculated for alkali halides, MgO, ZnS, and CdS crystals compare well with the available experimental data.

Photoelastic behaviour and interionic potentials in alkali halide crystals

1981 ◽  
Vol 59 (10) ◽  
pp. 1359-1366 ◽  
Author(s):  
Jai Shanker ◽  
T. S. Verma ◽  
A. Cox ◽  
M. J. L. Sangster
Keyword(s):  
Shell Model ◽  
High Frequency ◽  
Alkali Halide ◽  
Dielectric Constants ◽  
Critical Test ◽  
Photoelastic Data ◽  
Comparison Of The Results ◽  
Alkali Halide Crystals ◽  
Derivatives Of ◽  
Photoelastic Behaviour

In order to make a critical test of some recently developed interionic potentials based on the shell model, the photoelastic behaviour of the alkali halide crystals has been investigated. Values of the strain derivatives of the static and high-frequency dielectric constants have been calculated from sets of potentials due to Catlow et al., Sangster et al., and Sangster and Atwood. A comparison of the results obtained with available experimental photoelastic data demonstrates the superiority of the second set of potentials of Catlow et al.

Refractive indices, electronic polarizabilities and dielectric constants of alkali halides

1992 ◽  
Vol 33 (5) ◽  
pp. 389-393 ◽  
Author(s):  
R.R. Reddy ◽  
S. Anjaneyulu ◽  
T.V.R. Rao
Keyword(s):  
Alkali Halides ◽  
Dielectric Constants ◽  
Refractive Indices

scholarly journals SPECTROSCOPY IN A ROTATING DEFORMED NUCLEUS

2020 ◽  
Vol 2 ◽  
pp. 295
Author(s):  
C. T. Papadopoulos ◽  
R. Vlastou
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
High Spin ◽  
Theoretical Treatment ◽  
Recent Advances ◽  
Γ Rays ◽  
Deformed Nucleus ◽  
New Phenomena ◽  
Band Crossing

Recent advances in the physics of nuclei at high spin are presented. In particular the new phenomena observed by the latest generation of γ-rays spectrometers are discussed. An overview of experimental and theoretical treatment of "backbending·'' effect, quasiparticle alignment and band crossing is described in more detail. The outlines of the Cranked Shell Model, which is a successful framework for the interpretation of experimental data, are also reported.

Energy Levels of 50Ca Nucleus as a Function of the Classical Coupling Angle within MSDI

2021 ◽  
Vol 19 (5) ◽  
pp. 61-67
Author(s):  
Ali Khalaf Hasan ◽  
Dalal Naji Hameed
Keyword(s):  
Experimental Data ◽  
Angular Momentum ◽  
Shell Model ◽  
Energy Levels ◽  
Model Space ◽  
Closed Shell ◽  
Excitation Energies ◽  
Modified Surface ◽  
Coupling Angle ◽  
Surface Delta Interaction

In the construction of this kind of shell model, we take the residual interaction to be modified surface delta interaction MSDI. We have studied the excitation energies of the 50Ca a nucleus, which contain two neutrons outside closed shell of the 48Ca. Neutrons are in the model space pfpg. The energy levels and angular momentum of all possible cases were investigated. Thereby, we have effectively utilized a theoretical process to find link among the traditional coupling angle and energy levels at different orbital within neutron - neutron interaction. We observe the energy stages appear to follow two overall functions which depend on the classical coupling angles but are unconstrained of angular momentum I. We find out that our results agree with the experimental data.

STRUCTURE OF ODD 79,81,83Se ISOTOPES WITH PROTON AND NEUTRON EXCITATIONS ACROSS Z = 28 AND N = 40

2013 ◽  
Vol 22 (12) ◽  
pp. 1350091 ◽  
Author(s):  
VIKAS KUMAR ◽  
P. C. SRIVASTAVA
Keyword(s):  
Experimental Data ◽  
Shell Model ◽  
Magnetic Moments ◽  
Effective Interaction ◽  
Quadrupole Moments ◽  
Excitation Energies ◽  
Valence Space

The recently measured experimental data of 79,81,83 Se isotopes have been interpreted in terms of shell model (SM) calculations. The calculations have been performed in f5/2pg9/2 space with the recently derived interactions, namely JUN45 and jj44b. To study the importance of the proton excitations across the Z = 28 shell in this region, we have also performed calculation in fpg9/2 valence space using an fpg effective interaction with 48 Ca core and imposing a truncation. Excitation energies, B(2) values, quadrupole moments and magnetic moments are compared with the experimental data available. Present study reveals the importance of proton excitations across the Z = 28 shell for predicting quadrupole and magnetic moments.

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