International Journal of Physics

ISSN (Print): 2333-4568

ISSN (Online): 2333-4576

Editor-in-Chief: B.D. Indu

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

   

Article

Nuclide Spectra of Activities of Thorium, Uranium Series and Application in Gamma-spectrometry of Point Technogenic Samples

1Institute of Electron Physics of the National Academy of Sciences of Ukraine, Uzhgorod, Ukraine


International Journal of Physics. 2016, 4(2), 37-42
doi: 10.12691/ijp-4-2-3
Copyright © 2016 Science and Education Publishing

Cite this paper:
Pop O.M., Simulik V.M., Stets M.V.. Nuclide Spectra of Activities of Thorium, Uranium Series and Application in Gamma-spectrometry of Point Technogenic Samples. International Journal of Physics. 2016; 4(2):37-42. doi: 10.12691/ijp-4-2-3.

Correspondence to: Simulik  V.M., Institute of Electron Physics of the National Academy of Sciences of Ukraine, Uzhgorod, Ukraine. Email: vsimulik@gmail.com

Abstract

The radioactive nuclei decay of the nuclides in the 232Th, 235U and 238U series is under consideration. The Bateman-Rubinson system of differential equations is applied. The activity of any n-th nuclide of the series has been calculated. The standard nuclide spectra are found and are compared with experimental nuclide spectra of activities. The results of the measurements are the time parameters, which determine the event date. The examples of the measurement of the experimental nuclide spectra in the nuclear gamma spectrometry of the point technogenic samples have been considered.

Keywords

References

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Article

Anharmonicity and Impurity Effects on Infrared Absorption in High Temperature Superconductors

1Department of Physics, Indian Institute of Technology Roorkee, Roorkee-247667, India


International Journal of Physics. 2016, 4(2), 43-49
doi: 10.12691/ijp-4-2-4
Copyright © 2016 Science and Education Publishing

Cite this paper:
Hempal Singh, B. D. Indu. Anharmonicity and Impurity Effects on Infrared Absorption in High Temperature Superconductors. International Journal of Physics. 2016; 4(2):43-49. doi: 10.12691/ijp-4-2-4.

Correspondence to: B.  D. Indu, Department of Physics, Indian Institute of Technology Roorkee, Roorkee-247667, India. Email: drbdindu@gmail.com

Abstract

Taking into account the effects of anharmonicities and point impurities the quantum dynamics of phonons for high temperature superconductors is developed using Green’s function formalism via an almost complete Hamiltonian (without BCS Hamiltonian) which comprises the effects of (i) unperturbed electrons, (ii) unperturbed phonons, (iii) electron-phonon interactions, (iv) anharmonicities and (v) isotopic impurities. This is utilized to obtain the expressions for infrared absorption coefficient which can be resolved into diagonal and non-diagonal parts. Non-diagonal contribution arises only in impure crystals and vanishes in the case of pure crystal. The investigations are also made to study the dependence of infrared absorption coefficient on various parameters in the superconducting and normal regimes followed by numerical estimates for cuprate superconductor . The temperature dependence of infrared absorption coefficients and automatic emergence of pairons appears as a special feature of the theory.

Keywords

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Article

Natural Radioactivity and Associated Dose Rates in Soil Samples in the Destroyed Fuel Fabrication Facility, Iraq

1Department of Physics, College of Science, AL-Mustansiriya University, Iraq

2Ministry of Science and Technology, Iraq


International Journal of Physics. 2016, 4(3), 50-54
doi: 10.12691/ijp-4-3-1
Copyright © 2016 Science and Education Publishing

Cite this paper:
Abdulla Ahmad Rasheed, Nada Farhan Kadhum, Nadhim Khaleel Ibrahim. Natural Radioactivity and Associated Dose Rates in Soil Samples in the Destroyed Fuel Fabrication Facility, Iraq. International Journal of Physics. 2016; 4(3):50-54. doi: 10.12691/ijp-4-3-1.

Correspondence to: Nadhim  Khaleel Ibrahim, Ministry of Science and Technology, Iraq. Email: nawi1980@yahoo.com

Abstract

The activity concentrations of naturally occurring radionuclides 226Ra, 232Th and 40K in soil samples collected from Fuel Fabrication Facility in Al-Tuwaitha nuclear site were measured by using a high resolution gamma spectrometry system via High Purity Germanium (HPGe) Detector with a relative efficiency of (>40%) and resolution (<1.8keV) at energy of (1.33MeV) for 60Co. The average activity concentrations of 226Ra, 232Th and 40K in soil samples were found to be 15.78±1.16, 14.09±1.33 and 306.42±18.1 Bqkg-1, respectively. The results obtained for the corresponding radionuclides are lower than the worldwide average values of 35, 30, and 400 Bqkg-1, respectively. The average absorbed dose rate in air (Dγ), the average radium equivalent activity (Raeq) and the average external hazard index (Hex) were determined as 28.90±2.12 nGyh-1, 59.52±4.45 Bqkg-1 and 0.16±0.012, respectively, which are below the permissible limit.

Keywords

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