Physics Commons^™

The Future Of Nuclear Security In Moroccan Territory After The Creation Of The New Moroccan Agency Of Nuclear And Radiological Safety And Security: Opportunities And Challenges, Amal Touarsi, Amina Kharchaf

International Journal of Nuclear Security

Nowadays, a security regime for protecting nuclear and radiological material—providing an intelligent national regulatory institution and establishing national security laws—is necessary in order for a state to ensure security of nuclear and radiological materials used within its borders.

This paper focuses on discussing the opportunities and challenges facing the future of nuclear security after the creation of the new Moroccan Agency of Nuclear and Radiological Safety and Security.

The Future Of Nuclear Security: A Medical Physicist’S Perspective, Katharine E. Thomson

International Journal of Nuclear Security

Planning for the future of nuclear security is a vital and complex task, requiring cooperation and contribution from many disciplines and industries. This diversity of expertise should include the medical sector, which faces many of the same challenges as the nuclear industry: controlling access to dangerous material, creating a strong security culture, cooperating with the wider world and engaging the public.

Medical physicists, of which the author is one, oversee all aspects of small-scale radiation use. This paper discusses three key areas increasingly important to both medical and nuclear uses of radioactive materials: public engagement, prevention of nuclear and radiological …

Assessing And Enhancing Nuclear Safety And Security Culture For Small Facilities That Handle Radioactive Material, Solymosi Máté

International Journal of Nuclear Security

The use of radioactive sources is expanding all over the world and abreast the necessity of the enhancement of its safe and secure application is increasing too. In the nuclear industry, the safety and security are top priorities since decades. They share the same goal, to protect humans from the negative affect of the ionizing radiation. The human component of them is a significant factor and technical solutions can protect us so far and thus the culture for safety and security become a major focus. On the other hand, there are still some contradiction between recommendations and international guidance of …

Solar System Battery Backups For Reactor Coolant Pumps During Electricity Outages Resulting From Natural Disasters, Md. Shamsul Huda Sohel

International Journal of Nuclear Security

In a nuclear power plant, its coolant system is major safety equipment. Coolant system failure causes several accidents in nuclear history. There are so many causes for coolant system failure. One of them is lack of electric power for coolant pumps. In typically NPP there is backup system for power redundancy. In this article, focus on reactor coolant system and its backup power when main grid lines failure. Here discuss about solar backup power for batteries and increases a safety lines for reactor coolant pumps. So, our main goal is providing a battery backup from reliable natural source and ensuring …

The Effects Of Joule Heating On Electric-Driven Microfluidic Flow, Alexander P. Spitzer

Journal of the South Carolina Academy of Science

This study sought out to more clearly understand the relationship between Joule heating and fluid flow in microfluidic environments, and more specifically, under what circumstances would the fluid flow in the device possibly hinder an experiment being run on it. It had been previous theorised that an electric field may produce turbulence and even vortices within the fluid, which this study attempted to reproduce. Several variables were tested, namely insulating and conducting fluids, higher and lower AC voltages, Newtonian vs. non-Newtonian fluids, and higher and lower DC voltages. A correlation between these variables and turbulent flow was found, with more …

How To Enhance Interdisciplinary Competence—Interdisciplinary Problem-Based Learning Versus Interdisciplinary Project-Based Learning, Mirjam Brassler, Jan Dettmers

Interdisciplinary Journal of Problem-Based Learning

Interdisciplinary competence is important in academia for both employability and sustainable development. However, to date, there are no specific interdisciplinary education models and, naturally, no empirical studies to assess them. Since problem-based learning (PBL) and project-based learning (PjBL) are learning approaches that emphasize students’ collaboration, both pedagogies seem suitable to enhance students’ interdisciplinary competence. Based on the principle of constructive alignment and four instructional principles on interdisciplinary learning, this paper proposes that students profit more from interdisciplinary PBL (iPBL) than interdisciplinary PjBL (iPjBL). A pre-post study was conducted with a sample of 95 students participating in iPBL and 183 students …

Ismar / Rmcmr 2017 Abstract Book - Joint Conference Of The International Society Of Magnetic Resonance, The Rocky Mountain Conference On Epr, And The Rocky Mountain Conference On Magnetic Resonance

Rocky Mountain Conference on Magnetic Resonance

Abstracts from the 59th annual meeting of the Rocky Mountain Conference on Magnetic Resonance, hosted jointly with the International Society of Magnetic Resonance and the Rocky Mountain Conference on EPR. Held in Quebec City, Canada, July 23-28, 2017.

Mathematical Description And Mechanistic Reasoning: A Pathway Toward Stem Integration, Paul J. Weinberg

Journal of Pre-College Engineering Education Research (J-PEER)

Because reasoning about mechanism is critical to disciplined inquiry in science, technology, engineering, and mathematics (STEM) domains, this study focuses on ways to support the development of this form of reasoning. This study attends to how mechanistic reasoning is constituted through mathematical description. This study draws upon Smith’s (2007) characterization of mathematical description of scientific phenomena as ‘‘bootstrapping,’’ where negotiating the relationship between target phenomena and represented relations is fundamental to learning. In addition, the development of mathematical representation presents a viable pathway towards STEM integration. In this study, participants responded to an assessment of mechanistic reasoning while cognitive interviews …

Α-Particle Emission In The Reaction 48ca+Ta At Coulomb Energy, K. Mendibaev, B. M. Hue, S. M. Lukyanov, D. Aznabayev, C. Borcea, V. A. Maslov, Yu. E. Penionzhkevich, F. Rotaru, I. Sivacek, N. K. Skobelev, A. A. Smirnov, K. A. Kuterbekov

Eurasian Journal of Physics and Functional Materials

Inclusive energy spectra have been measured for light charged particles emitted in the bombardment of Ta target by⁴⁸Ca ions at 261 MeV and 471 MeV. The reaction products were analyzed and detected by means of a (∆E-E) telescope placed in the focal plane of a magnetic spectrometer located at forward angles with respect to the beam direction. In all the reactions studied light charged particles with an energy close to the respective calculated kinematic limit for a two-body exit channel are produced with relatively great probability. The results obtained make it possible to draw some conclusions about the …

Neutron-Removal Cross Sections Of 6he, 8he, 8li, And 9be, 10be Nuclei, B. M. Hue, T. Isataev, S. M. Lukyanov, K. Mendibaev, A. G. Artukh, D. Aznabayev, C. Borcea, P. V. Cuong, B. Erdemchimeg, S. A. Klygin, G. A. Kononenko, K. A. Kuterbekov, V. A. Maslov, V. Ostashko, Yu. E. Penionzhkevich, F. Rotaru, Yu. Sereda, A. N. Vorontsov, T. D. Thiep

Eurasian Journal of Physics and Functional Materials

Neutron-removal cross-section ( σ_-xn ) measurements of neutron-rich light nuclei were performed on the COMBAS fragment-separator with a multi-detector Si telescope at intermediate energies (22-34) MeV/nucleon. The removals of one neutron from⁸Li and⁹Be, two neutrons from⁶ He and¹⁰ Be and four neutrons from 8 He were observed from the reactions on a Si-CsI(Tl) telescope. Results of σ_-xn for⁶ He,⁸ He,⁸ Li,⁹ Be and¹⁰ Be nuclei were obtained and compared with those of previously measured data. The data indicate that⁴ He is a good core within^{6 …}

Results Of Radiological Survey Of The Territory Adjacent To The "Atomic" Lake, A. O. Aidarkhanov, S. N. Lukashenko, M. A. Umarov, Yu. Yu. Yakovenko

Eurasian Journal of Physics and Functional Materials

The article presents working results of radiation status survey in the territory adjacent to the "Atomic lake", a venue of the first USSR excavation explosion. In the course of research, a picture of areal radiation contamination has been obtained in the territory with technogenic radionuclides¹³⁷Cs ,²⁴¹Am ,¹⁵²Eu . A pattern of radionuclide distribution in depth is shown at different spots (crater bank, Shagan river floodplain, the area of the external reservoir). Data is presented on concentrations of technogenic radionuclides³H,^239+240,238Pu ,⁹⁰Sr ,⁶⁰Co ,¹⁵⁴Eu ,^{152 …}

Nuclear Reactions In Astrophysics, Yu. E. Penionzhkevich

Eurasian Journal of Physics and Functional Materials

This work is an attempt to present some problems on the evolution of the Universe: the nucleosynthesis and cosmochronology from the standpoint of physics of particles and nuclei, in particular with the use of the lat est results, obtained by means of radioactive nuclear beams. The comparison is made between the processes taking place in the Universe and the mechanisms of for mation and decay of nuclei, as well as of their interaction at different energies. Examples are given to show the capabilities of nuclear physics methods for studying cosmic objects and properties of the Universe. The results of investigations …

Effect Of Lithium Doping On Electrophysical And Diffusion Properties Of Nonstoichiometric Superionic Copper Selenide Cu1.75se, M. Kh. Balapanov, K. A. Kuterbekov, M. M. Kubenova, R. Kh. Ishembetov, B. M. Akhmetgaliev, R. A. Yakshibaev

Eurasian Journal of Physics and Functional Materials

The results of studies of the ionic conductivity and the conjugated chemical diffusion coefficients (CCDC) in the nonstoichiometric Li^xCu^1.75Se(0 ≤ x ≤ 0.25) ternary alloys are presented. It has been observed that the values of the ionic conductivity of Cu1.75Se copper selenide decreases with lithium doping in general owing to increasing the the activation energy. The increasing of the conjugate chemical diffusion coefficients of the cations and electron holes was observed with increasing of lithium content, despite the decreasing of self-diffusion coefficients of the cations and decreasing of electron mobilities. The behavior of the conjugate chemical …

New Insight Into The Cluster Structure Of 9be By Reactions With Deuteron Beam, S. M. Lukyanov, A. S. Denikin, M. A. Naumenko, V. Burjan, W. H. Trzaska, M. Harakeh, D. Etasse, V. Kroha, J. Mrazek, K. Mendibayev, I. Sivacek, V. Glagolev, S. Piskor, Yu. E. Penionzhkevich, N. K. Skobelev, I. Stefan, D. Verney, K. A. Kuterbekov, T. Zholdybayev

Eurasian Journal of Physics and Functional Materials

Angular distributions of protons, deuterons, tritons and alpha particles emitted in the reaction²H +⁹Be at E lab =19.5 MeV were measured with an aim to shed light on the internal cluster structure of ⁹ Be and to study possible cluster transfer of⁵He. The analyses suggest a significant contribution of five nucleon transfer in the reaction channel⁹Be ( d ,⁴He)⁷Li.

Structure And Electrophysical Properties Of Materials Based On Nanoparticles Of Oil Asphaltenes, M. Yu. Dolomatov, R. Z. Bakhtizin, S. A. Shutkova, K. F. Latyipov, Z. Z. Ishniyazov, N. H. Paymurzina, A. M. Petrov

Eurasian Journal of Physics and Functional Materials

This paper is a generalization of the authors’ works in the field of asphaltene physics fulfilled in recent years. Specific features of the "insulator-semiconductor" phase transition in high-boiling hydrocarbon fractions are discussed. It is shown that the active resistance of the samples decreases with heating to (65 - 85)0 C. At the same time, the concentration of paramagnetic centers increases, which is confirmed by the EPR. The growth of electrical conductivity in high-boiling hydrocarbon fractions containing asphaltenes is caused by the temperature generation of charge carriers - free radicals (spins) formed as a result of the rupture of weak carbon-carbon …

Preparation And Characterization Of Down-Shifting Film For Silicon Solar Cell Based On The Stilben 420, Pva Polymer And Silver Nanoparticles, A. Mantel, I. Irgibaeva, A. Aldongarov, N. Barashkov

Eurasian Journal of Physics and Functional Materials

We have developed method of preparation of luminescent polymer films based on polyvinyl alcohol (PVA), organic dyestilben 420 (St420) and silver nanoparticles (AgNPs). Concentration of St420 which provides most efficient luminescence quantum yield was determined for PVA film. It was found that addition of 10 nm AgNPs to St420 samples in PVA leads to increase of absorption intensity and decrease of luminescence intensity. Quenching of emission of St420 by addition of AgNPs is probably due to charge transfer from the dye to metal nanoparticles. External quantum efficiency (EQE) curves of St420 PVA were measured for optimal concentration of the dye. …

Spectroscopy Of Transfermium Elements At Dubna: Results And Plans, A. Yeremin, A. Popeko, O. Malyshev, V. Chepigin, A. Svirikhin, A. Isaev, Yu. Popov, M. Chelnokov, A. Karpov, A. Kuznetsova, I. Izosimov, E. Sokol, V. Saiko, D. Katrasev, A. Lopes-Martens, K. Hauschild, K. Rezynkina, O. Dorvaux, B. Gall, Z. Asfari, P. Brionett, J. Piot, S. Hofmann, P. Mosat, D. Tonev, E. Stefanova

Eurasian Journal of Physics and Functional Materials

During the last 12 years using the GABRIELA (Gamma Alpha Beta Recoil Invetsigations with the ELectromagnetic Analyser) detector set up and kinematic recoil separators VASSILISSA / SHELS the experiments aimed to the gamma and electron spectroscopy of the Fm-Db isotopes, formed at the complete fusion reactions⁴⁸Ca +^207,208Pb--^255,256 No* ,⁴⁸Ca +²⁰⁹Bi--²⁵⁷Lr* ,²²Ne+²³⁸U--²⁶⁰No*,⁵⁰Ti +²⁰⁸Pb--²⁵⁸Rf* and⁵⁰Ti +²⁰⁹Bi--²⁵⁹Db* , were performed at FLNR JINR.

Study Of Influence Of Mobile Phone Irradiation To Tooth Enamel Epr Spectra, K. Sh. Zhumadilov, A. I. Ivannikov, V. F. Stepanenko, M. Hoshi

Eurasian Journal of Physics and Functional Materials

The contribution of mobile phones influence on electron spin resonance (EPR) spectra formation and electromagnetic noise signal for accuracy of dose estimation on example of tooth enamel samples measurements was investigated for low dose range. The spectra of irradiated tooth enamel samples in doses from 0 to 500 mGy have been measured. The spectra have been processed by mathematical fitting of model spectrum by least square methods. Standard deviation from nominal doses and uncertainty of dose estimation were determined. The noise level has been estimated in spectra by rest sum after model spectra fitting. Enamel samples were measured in 3 …

Discovery Of Elements 113 - 118, V. Utyonkov, Yu. Ts. Oganessian, S. N. Dmitriev, M. G. Itkis, K. J. Moody, M. Stoyer, D. Shaughnessy, J. B. Roberto, K. Rykaczewski, J. H. Hamilton

Eurasian Journal of Physics and Functional Materials

Review of discovery and investigation of isotopes of elements 113-118 produced in the reactions of⁴⁸Ca with target nuclei²³⁸U-²⁴⁹Cf is presented. The synthesis of the heaviest nuclei, their summary decay properties, and methods of identification are discussed. The radioactive properties of the new nuclei give evidence of the significant increase of the stability of the heavy nuclei with rise of their neutron number and approaching magic number N=184.

Study Of Enhancement Of Total Cross Sections Of Reactions With 6 He, 6,9 Li Nuclei, Yu. E. Penionzhkevich, Yu. G. Sobolev, V. V. Samarin, M. A. Naumenko

Eurasian Journal of Physics and Functional Materials

The energy dependence of total cross sections of reactions⁶He + Si and^6,9Li + Si in the beam energy range 5-30 MeV/nucleon has been measured. An agreement with the published experimental data for the reaction 6 He + Si was obtained. For the reaction⁹Li + Si new data in the vicinity a local enhancement of the total cross section was obtained. Theoretical analysis of possible reasons of appearance of this peculiarity in the collisions of nuclei⁶He and⁹Li with Si nuclei has been carried out including the influence of external neutrons of …

Nustar Experiments On The Way From Gsi To Fair, C. Scheidenberge

Eurasian Journal of Physics and Functional Materials

The NUSTAR Collaboration will perform experiments with relativistic exotic nuclei and superheavy elements at GSI and FAIR. Presently, several new FAIR detector systems are under construction for high-resolution spectrometer experiments, decay spectroscopy, reaction studies with internal and external targets, and for experiments with stopped and re-accelerated beams. Due to the delayed start of the FAIR project, the new FAIR detectors will be used at GSI with beams from the existing accelerators (UNILAC, SIS-18/ESR) and set the scene for new experimental avenues, not existing so far. The planned intermediate research program and the new opportunities are outlined.

Neutron Transfer In Reactions With Light Weakly-Bound Nuclei, M. A. Naumenko, Yu. E. Penionzhkevich, V. V. Samarin, N. K. Skobelev

Eurasian Journal of Physics and Functional Materials

Experimental cross sections for formation of isotopes 44,46 Sc - in reaction ( 3 He + 45 Sc), 46 Sc - in reaction ( 6 He + 45 Sc), 65 Zn - in reaction ( 3 He + 64 Zn), 196,198 Au - in reactions ( 3,6 He + 197 Au) have been analyzed within the TDSE approach for the external neutrons of 3,6 He, 45 Sc and 197 Au nuclei. Fusion-evaporation was taken into account using the NRV evaporation code. Results of calculation demonstrate overall satisfactory agreement with the experimental data

Fusion And Breakup Fusion Of 6li With 194pt At Energies Around Coulomb Barrier, C. Petrone, S. Calinescu, C. Borcea, A. Buta, R. Borcea, R. Margineanu, A. Negret, A. Olacel, F. Rotaru, M. Stanoiu, G. Suliman, Yu. E. Penionzhkevich, Yu. G. Sobolev, S. M. Lukyanov, N. K. Skobelev, M. P. Ivanov, Ph. Dessagne, M. Kerveno

Eurasian Journal of Physics and Functional Materials

Results for fusion and breakup fusion reaction ( 6 Li+ 194 Pt) are presented and compared with other experimental data and model calculations. A strong isotopic effect is observed when comparing our data with results from ( 6 Li+ 198 Pt)

The First Identification Of The Proton Halo In The Excited State Of 13n, A. S. Demyanova, A. A. Ogloblin, A. N. Danilov, T. L. Belyaeva, S. A. Goncharov, W. Trzaska

Eurasian Journal of Physics and Functional Materials

We demonstrate that the radii of excited nuclear states can be estimated using the (³He, t) charge-exchange reaction and relying on the modified diffraction model.The radius of the 13 N excited state with an excitation energy of E*=2.37 MeV,which lies in a continuous spectrum, is determined. The radius of this state proves to be close to that of the mirror 3.09-MeV state of the 13 C nucleus, which possesses a neutron halo but lies in a discrete spectrum. Thereby, we demon- strate that the 2.37-MeV state of the 13 N nucleus has a proton halo. The analysis is …

Sofc: Prospects Of Development, K. A. Kuterbekov, K. Zh. Bekmyrza, A. Nikonov, S. Paranine, A. Lipilin, T. Baitassov, A. Nygymanova

Eurasian Journal of Physics and Functional Materials

One of the main conditions for the transition to hydrogen energy is development of reliable, high-performance and cost-effective fuel cells, in which chemical energy is converted directly into electrical energy. The advantages of solid oxide fuel cells (SOFC) are: high electrical efficiency (50 - 60)%, in cogeneration with thermal energy the efficiency may reach 90%, and high operating temperatures (700 - 900 °C), which allows us to use practically any hydrocarbon fuel.

Ionizing Radiation As A Powerful Tool For Modification Of Metallic Nanostructures, K. K. Kadyrzhanov, A. L. Kozlovskiy, A. A. Mashentseva

Eurasian Journal of Physics and Functional Materials

This paper presents a case study of targeted modification of the structure and properties of zinc nanotubes ordered arrays by treatment with Xe⁺²² and Kr⁺¹⁷ swift heavy ions (SHI). Polyethylene terephthalate track-etched membranes (PET TeMs) with a pore density of (4 × 10 9 ) ions/cm² have been used as a template for electrochemical deposition of Zn. Scanning electron microscopy and energy dispersive analysis have been used for a comprehensive elucidation of the dimensionality, chemical composition of the synthesized samples. Dynamics of changes in the crystallite shape and orientation of NTs before and after irradiation has been …