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Energy Levels Calculations of 24Al and 25Al Isotopes
Saeed Mohammadi,
Banafsheh Nemati Giv,
Nafiseh Shayan Shakib
Issue:
Volume 2, Issue 1, March 2017
Pages:
1-4
Received:
10 December 2016
Accepted:
28 December 2016
Published:
20 January 2017
DOI:
10.11648/j.ns.20170201.11
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Abstract: In this article, the energy levels of Aluminum isotopes 24Al and 25Al are calculated using OXBASH shell model code. The calculations were carried out in the SD model space with the W and CW Hamiltonian [1, 2] using the code OXBASH for windows PC [3]. This code which is based on one of the most applicable nuclear models, the shell model, deals with evaluating energy levels in nuclei. Using this code to calculate the energy levels of an isotope, produces several files that contains a set of data. The ground state energy of a nucleus and also the probable energies of excitation levels can be calculated by OXBASH. Programs will be reliable only when results meet experimental procedures. A compilation of SD-shell energy levels calculated with the USD Hamiltonian was published around 1988. A comparison had been made between our results and the available experimental data to test theoretical shell model description of nuclear structure in Aluminum isotopes. The calculated energy spectrum is in good agreement with the available experimental data.
Abstract: In this article, the energy levels of Aluminum isotopes 24Al and 25Al are calculated using OXBASH shell model code. The calculations were carried out in the SD model space with the W and CW Hamiltonian [1, 2] using the code OXBASH for windows PC [3]. This code which is based on one of the most applicable nuclear models, the shell model, deals with ...
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Utilization of the Changes in Mechanical Properties as Dosimeter Due to Gamma Irradiation of High-Density Polyethylene (HDPE)
Abdelnabi Ali Elamin,
Elfatih Ahmed Hassan,
Abdelrahman Elhassan Mohamed–Osman,
Mubarak Dirar Abd-Alla,
Mohamed Habib Ahmed Elkanzi
Issue:
Volume 2, Issue 1, March 2017
Pages:
5-10
Received:
4 January 2017
Accepted:
5 January 2017
Published:
3 February 2017
DOI:
10.11648/j.ns.20170201.12
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Abstract: Polymer materials are required to be used in nuclear power stations as insulation materials of electrical wire and cable. For the use of polymer materials in such regions, the electrical performance under different environments of radiation is different from that without radiation has been found through previous research. The aim of this paper is to use the change in mechanical properties with radiation dose to design polymer dosimeter. The experimental results show an improvement of Black PE mechanical properties such as distension, tensile strength and elongation at break as dose increases, indicating the predominance of cross-linking over oxidative degradation. The predominance of cross-linking results show linear relations between distension, tensile strength and elongation at break versus absorbed dose of gamma rays source. These relationships between these properties and dose level can be utilized as measuring tool (Dosimeter) for radiation exposure that incident on the HDPE samples.
Abstract: Polymer materials are required to be used in nuclear power stations as insulation materials of electrical wire and cable. For the use of polymer materials in such regions, the electrical performance under different environments of radiation is different from that without radiation has been found through previous research. The aim of this paper is t...
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Estimation of Semi-Empirical Mass Formula Coefficients
Mirzaei Mahmoud Abadi Vahid,
Mirhabibi Mohsen,
Askari Mohammad Bagher
Issue:
Volume 2, Issue 1, March 2017
Pages:
11-15
Received:
26 December 2016
Accepted:
12 January 2017
Published:
4 February 2017
DOI:
10.11648/j.ns.20170201.13
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Abstract: Using linear least squares method and by data of atomic mass, the present study calculates the coefficients of volume, surface, Coulomb, and asymmetry terms in semi-empirical formula. Our findings show that the mass of neutron and hydrogen can be estimated via developing this example. The results of the present calculations are also compared with those of similar previous studies.
Abstract: Using linear least squares method and by data of atomic mass, the present study calculates the coefficients of volume, surface, Coulomb, and asymmetry terms in semi-empirical formula. Our findings show that the mass of neutron and hydrogen can be estimated via developing this example. The results of the present calculations are also compared with t...
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Statistic Methods for Assessments of Risks and Damages at Nuclear Power Plants
Alexander Valyaev,
Gurgen Aleksanyan,
Alexey Valyaev,
Oleg Arkhipkin
Issue:
Volume 2, Issue 1, March 2017
Pages:
16-25
Received:
12 December 2016
Accepted:
27 December 2016
Published:
20 February 2017
DOI:
10.11648/j.ns.20170201.14
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Abstract: Many high development countries have not the natural hydrocarbon deposits. That is why NPP energy production is constantly and intensive increases. For example, in France. The corresponding treats under NPP exploitation also are increasing, that caused by different natural and manmade factors, including as attractive objects for possible directed terrorist attacks. Correct assessments of corresponding risks and damages are necessary for any NPP at all periods: its projecting, building and exploitation under its complex integrated emergency management. Here we try to analyze some possible methods of NPP risk assessments. Early we predicted the irradiation doses and corresponded risks for population under implementation of Russian Federal Program:” Development of Russian atomic energy industrial complex on 2007-2020 years at 10 homeland NPP, that operated in normal non disasters regimes during two last decades. But such data are absent for NPP, that have been or will be under non prognostic emergencies. It is connected with the following facts. The part or total of needed information may be obtained only after NPP disasters. Some NPP are located in the dangerous regions and exposed to intense negative natural responses (earthquakes, tsunami, etc.) and manmade ones, when NPP are located in some dangerous conflicts zones with high level of possible terrorism threats. Here the using of classic methods of expertise risk NPP assessments are not correct and often impossible at all. Some needed thematic data may be obtained from primary virtual computer tests of individual NPP with imitation of possible disasters. It allows to plan the actions for NPP operators and special services under serious NPP disasters or may be to prevent them at all. These thematic problems, connected with the following NPP: Fukusima, Seversk in Tomsk region, Armenian, the future NPP in Kazakhstan and nuclear terrorism are also under consideration in this article.
Abstract: Many high development countries have not the natural hydrocarbon deposits. That is why NPP energy production is constantly and intensive increases. For example, in France. The corresponding treats under NPP exploitation also are increasing, that caused by different natural and manmade factors, including as attractive objects for possible directed t...
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Experimental Investigation of Damage Detection Based on a Novel Optical Method
Mark Sandor,
James Cheung
Issue:
Volume 2, Issue 1, March 2017
Pages:
26-30
Received:
17 January 2017
Accepted:
29 January 2017
Published:
21 February 2017
DOI:
10.11648/j.ns.20170201.15
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Abstract: In this article, the stress concentration in homogenous material was studied using an optical method of caustics. The study on stress concentration is of great research value to evaluate the damage inside materials. In this work, one optical experimental method, caustics method, is introduced to study the mechanical behavior of an elastic plate of transparent material. The governing equations of caustics method which is used to represent the optics-mechanics relation of the singular yield close to the external load are derived based on the exponential asymptotic expansion. The experimental result shows this optical method as a nondestructive methodology can be used to detect the damage in load zone with high accuracy.
Abstract: In this article, the stress concentration in homogenous material was studied using an optical method of caustics. The study on stress concentration is of great research value to evaluate the damage inside materials. In this work, one optical experimental method, caustics method, is introduced to study the mechanical behavior of an elastic plate of ...
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