Welcome to International Journal of Physics

International Journal of Physics is a peer-reviewed, open access journal that publishes original research articles and review articles in all areas of physics. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of physics.

ISSN (Print): 2333-4568

ISSN (Online): 2333-4576

Editor-in-Chief: B.D. Indu

Website: http://www.sciepub.com/journal/IJP

   

Article

Can a Charge Configuration with Extreme Excess Charge be Stable?

1B&E Scientific Ltd, BN25 4PA, United Kingdom


International Journal of Physics. 2015, 3(4), 150-154
doi: 10.12691/ijp-3-4-2
Copyright © 2015 Science and Education Publishing

Cite this paper:
Arne Bergstrom. Can a Charge Configuration with Extreme Excess Charge be Stable?. International Journal of Physics. 2015; 3(4):150-154. doi: 10.12691/ijp-3-4-2.

Correspondence to: Arne  Bergstrom, B&E Scientific Ltd, BN25 4PA, United Kingdom. Email: arne.bergstrom@physics.org

Abstract

The classical electrodynamics of a macroscopic system with extreme excess charge is considered. The crucial assumption is here made that the electrodynamics of the system is completely dominated by the huge Coulomb repulsion, but counteracted by the resulting, violently oscillating acceleration field. It is shown that a special case of a system of this kind in the form of a charged spherical shell with powerful excess charge may exhibit violent such oscillations, effectively freezing it from expansion and thus in principle showing a counter-intuitive stability, albeit presumably short-lived. This effect may possibly have a bearing on, e g, some types of ball lightning observations, and is here also discussed in relation to the virial theorem, which traditionally is considered to exclude stable, localised electromagnetic configurations of this type. The oscillation frequency obtained for confinement of the type discussed in the article agrees well with what has been shown in laboratory experiments using microwaves to produce stationary luminous plasmoids in test tubes.

Keywords

References

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Article

No-Core Shell Model Calculations for 6,8He, 8,10,12B

1Department of Physics, College of Education for Pure Sciences, University of Babylon, Babylon, Iraq


International Journal of Physics. 2015, 3(4), 155-158
doi: 10.12691/ijp-3-4-3
Copyright © 2015 Science and Education Publishing

Cite this paper:
Fouad A. Majeed, Sarah S. Ahmed. No-Core Shell Model Calculations for 6,8He, 8,10,12B. International Journal of Physics. 2015; 3(4):155-158. doi: 10.12691/ijp-3-4-3.

Correspondence to: Fouad  A. Majeed, Department of Physics, College of Education for Pure Sciences, University of Babylon, Babylon, Iraq. Email: fouadalajeeli@yahoo.com

Abstract

The excitation energies of 6,8He and 8,10,12B isotopes in the p-shell region have been calculated by using large-basis no-core (i.e. considering all nucleons active with partial restrictions imposed on some nucleons). The shell model calculations have been performed using spsdpf model space with wbt effective residual interaction fitted for the p-shell nuclei. Three set of restrictions have been imposed named in our calculations have been used. The comparison of our theoretical work with the recent available experimental data shows that the restriction gives best results for Helium isotopes while is in better agreement with the experiment for Boron isotopes.

Keywords

References

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Article

Measurement of Uranium Concentrations, Radium Content and Radon Exhalation Rate in Iraqian Building Materials Samples

1Department of Physics, College of Science, Kerbala University, Kerbala, Iraq

2Department of Physics, College of Science, Mosul University, Mosul, Iraq


International Journal of Physics. 2015, 3(4), 159-164
doi: 10.12691/ijp-3-4-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
Abdalsattar K Hashim, Laith A. Najam. Measurement of Uranium Concentrations, Radium Content and Radon Exhalation Rate in Iraqian Building Materials Samples. International Journal of Physics. 2015; 3(4):159-164. doi: 10.12691/ijp-3-4-4.

Correspondence to: Abdalsattar  K Hashim, Department of Physics, College of Science, Kerbala University, Kerbala, Iraq. Email: abdalsattarkareem@yahoo.com

Abstract

Uranium, radium concentration and radon exhalation rate in twenty one building material samples collected from markets of Iraq were measured using the sealed-can technique based on the CR-39 SSNTDS. The values of effective radium content were found to vary from (0.037 to 4.986) Bq/kg with a mean value of 0.745Bq/kg. The values of mass exhalation rates of radon vary from (0.688 ×10−8 to46.910×10−8) Bq/kg.day with a mean value 7.012×10−8Bq/kg.day, while the surface exhalation rates of radon vary from (0.344×10−6to23.472×10−6)Bq/m2.day with a mean value of 3.508×10−6Bq/m2.day. Uranium content in these samples has been found, it is varying from 0.074 to 5.055 ppm with a mean value of 0.755ppm. The mean values of radon exhalation rate, radium content and uranium concentration in building material samples of study area were found well below the values of 57.600 mBq/m2.h , 370 Bq/kg and 3ppm, respectively.

Keywords

References

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