scholarly journals Effects of Ion Beam Irradiation on NanoscaleInOxCooper-Pair Insulators

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Srdjan Milosavljević ◽  
Djordje Lazarević ◽  
Koviljka Stanković ◽  
Milić Pejović ◽  
Miloš Vujisić
Keyword(s):  
Radiation Effects ◽  
Cooper Pair ◽  
Ion Beam ◽  
Ion Beams ◽  
Metallic State ◽  
Cooper Pairs ◽  
Current Voltage ◽  
State Radiation ◽  
Radiation Induced ◽  
Induced Changes

This paper examines the effects of irradiating indium oxide films of nanoscale thickness by ion beams, when these films are in the Cooper-pair insulator state. Radiation effects are predicted on the basis of Monte Carlo simulations of ion transport. Results of numerical experiments are interpreted within the theoretical model of a Cooper-pair insulator. The study suggests that radiation-induced changes inInOxfilms exposed to ion beams could significantly alter their current-voltage characteristics and that a transition to a metallic state is possible, due to radiation-induced perturbation of the fine-tuned granular structure. Furthermore, incident and displaced ions can break up enough Cooper pairs inInOxfilms to cause dissolution of this specific insulating state.

scholarly journals Radiation hardness of indium oxide films in the Cooper-pair insulator state

2012 ◽  
Vol 27 (1) ◽  
pp. 40-43 ◽  
Author(s):  
Djordje Lazarevic ◽  
Milos Vujisic ◽  
Koviljka Stankovic ◽  
Edin Dolicanin ◽  
Predrag Osmokrovic
Keyword(s):  
Indium Oxide ◽  
Radiation Effects ◽  
Cooper Pair ◽  
Oxide Films ◽  
Incident Radiation ◽  
Metallic State ◽  
Radiation Induced ◽  
Theoretical And Numerical Analysis ◽  
Induced Changes ◽  
Indium Oxide Films

This paper investigates possible radiation effects in the Cooper-pair insulator state of indium oxide films. Radiation effects are predicted on the basis of Monte Carlo simulations. Results of a combined theoretical and numerical analysis suggest that radiation-induced changes in the investigated films could significantly affect their current-voltage characteristics, and that a transition to a metallic state is possible, due to radiation-induced disruption of the fine-tuned granular structure. Dissociation of Cooper pairs, caused by both the incident radiation and the ions displaced within InOx films, can also destroy the conditions for this specific insulating state to subsist.

scholarly journals Simulated radiation effects in the superinsulating phase of titanium nitride films

2011 ◽  
Vol 26 (3) ◽  
pp. 254-260 ◽  
Author(s):  
Milos Vujisic ◽  
Dusan Matijasevic ◽  
Edin Dolicanin ◽  
Predrag Osmokrovic
Keyword(s):  
Titanium Nitride ◽  
Josephson Junction ◽  
Radiation Effects ◽  
Ion Beam ◽  
Material Structure ◽  
Pair Tunneling ◽  
Current Voltage ◽  
Josephson Junction Array ◽  
Radiation Induced ◽  
Junction Array

This paper investigates possible effects of alpha particle and ion beam irradiation on the properties of the superinsulating phase, recently observed in titanium nitride films, by using numerical simulation of particle transport. Unique physical properties of the superinsulating state are considered by relying on a two-dimensional Josephson junction array as a model of material structure. It is suggested that radiation-induced change of the Josephson junction charging energy would not affect the current-voltage characteristics of the superinsulating film significantly. However, it is theorized that a relapse to an insulating state with thermally activated resistance is possible, due to radiation-induced disruption of the fine-tuned granular structure. The breaking of Cooper pairs caused by incident and displaced ions may also destroy the conditions for a superinsulating phase to exist. Finally, even the energy loss to phonons can influence the superinsulating state, by increasing the effective temperature of the phonon thermostat, thereby reestablishing means for an energy exchange that can support Cooper pair tunneling.

Radiation-induced implantation of polymeric films in metallic substrates

1986 ◽  
Vol 1 (4) ◽  
pp. 577-582
Author(s):  
M.W. Ferralli ◽  
M. Luntz
Keyword(s):  
Film Formation ◽  
Ion Beam ◽  
Ion Beams ◽  
Polymeric Films ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Hydrocarbon Gases ◽  
Metallic Substrates ◽  
Radiation Induced ◽  
Stage Process

Implanted, polymeric films have been produced by accelerator-ion-beam irradiation of metallic substrates immersed in hydrocarbon gases. Typical substrates include silver, aluminum, and steel; hydrocarbon gases include 1,3 butadiene and ethylene at 6.6 Pa pressure; ion beams employed include singly ionized H, He, and Ar at 30 keV. Experimental procedures and corrosion-resistance properties of the films are reviewed (each discussed elsewhere). A theory of the film-formation process is presented. It is concluded that the films form as the result of a two-stage process: glow-discharge adhesion and polymerization followed by radiation-induced implantation resulting from collisional recoil and substrate sputtering.

Effect of Two Graded Doses of Whole-Body X-Irradiation and Radioprotection by the Use of S-Phenethyl Formamidino 4 (N-Ethyl Isothioamide) Morpholine Dihydrochloride

1983 ◽  
Vol 22 (05) ◽  
pp. 237-245 ◽  
Author(s):  
P. K. Chaturvedi ◽  
S. N. Pandeya ◽  
S. S. Hasan
Keyword(s):  
Radiation Effects ◽  
Whole Body ◽  
X Irradiation ◽  
Radiation Induced ◽  
Induced Changes ◽  
The Brain

The protection offered by a newly synthesized compound (S-phenethyl-formamidino-4(N-ethyl isothioamide) morpholine dihydrochloride) against radiation effects on DNA, RNA and protein biosynthetic processes in the brain, and on metabolites of 5-HT and nor-adrenalin, i.e., 5-HIAA and VMA, in the urine, including the radiobiological damage to thyroid and testes, was evaluated. The use of the compound prior to irradiation prevented radiation-induced changes in the thyroid and testes. The radiation-induced alterations in the pattern of DNA, RNA, protein in the brain, and in 5-HIAA and VMA in urine could be averted by treatment with this compound prior to each dose of X-irradiation.

Electrical Property of Calcium-Zirconium-Indium Oxide by Irradiation

2005 ◽  
Vol 480-481 ◽  
pp. 579-584 ◽  
Author(s):  
Bun Tsuchiya ◽  
S. Nagata ◽  
Kesami Saito ◽  
Kentaro Toh ◽  
Tadaaki Shikama
Keyword(s):  
Indium Oxide ◽  
Radiation Effects ◽  
Irradiation Time ◽  
Reactor Power ◽  
Materials Testing ◽  
Fission Reactor ◽  
Atomic Displacements ◽  
Electrical Degradation ◽  
Radiation Induced ◽  
Induced Changes

Radiation induced changes in electrical properties of calcium-zirconium-indium oxide ceramics (CaZr0.9In0.1O3-d) were investigated using a fission reactor of Japan Materials Testing Reactor (JMTR). Electrical conductivity of CaZr0.9In0.1O3-d under the reactor irradiation increased by the Radiation Induced Conductivity (RIC), Radiation Induced Electromotive Force (RIEMIF)and Radiation Induced Electrical Degradation (RIED), caused by the electronic excitation. The RIC and the RIEMF decreased gradually for the constant value of the reactor power with the increase of irradiation time. Moreover, it was confirmed by Post-irradiation Examination (PIE) experiments that the initial electrical and thermal properties were completely degraded by the irradiation. These radiation effects are attributed to point defects or their clusters produced by atomic displacements caused by neutron collisions and also by the radiolysis.

Radiation Damage in Metallic Materials

MRS Bulletin ◽  
1997 ◽  
Vol 22 (4) ◽  
pp. 14-21 ◽  
Author(s):  
H. Ullmaier
Keyword(s):  
Radiation Damage ◽  
Radiation Effects ◽  
Ion Beam ◽  
The United States ◽  
Fusion Reactors ◽  
Development Programs ◽  
Unique Method ◽  
Radiation Induced ◽  
Fundamental Research ◽  
Basic And Applied Research

Radiation-damage research started with the installation of the first nuclear reactors in the United States. In 1946 Wigner pointed out that energetic neutrons would displace atoms from their regular lattice sites and thus change the properties of irradiated materials—a prediction that was soon confirmed experimentally. Most of these changes are unfavorable for the performance of materials, justifying the influence of radiation being referred to as “radiation damage.”Since radiation-induced materials degradation can have a drastic impact on the safe and economic operation of present fission reactors and, probably even more, on future fusion reactors, radiation-damage research comprised a large part of the research-and-development programs for nuclear materials. As a result of this effort, a broad database is now available, and materials have been developed that fulfill practically all requirements being encountered in present nuclear technology.Besides this applied work, extensive fundamental research on radiation effects has been carried out because physicists soon recognized that bombardment with energetic particles offered a unique method to create controlled populations of defects in solids. Whereas the cross-linking between basic and applied research was rather weak in the early stages, a convergence of the two branches has been clearly noticeable during the last decade. This welcome development occurred for a variety of reasons. Examples are the need to employ simulation irradiations in cases where no prototypic devices exist (fusion reactors, high-power spallation neutron sources) and the increasing application of ion-beam techniques in microelectronics, thin-film technology, and metallurgy where the damage produced by the implanted ions needs clarification.

Ion Beam Induced Modifications in Conducting Polymers

2013 ◽  
Vol 341 ◽  
pp. 69-105
Author(s):  
R.C. Ramola ◽  
Subhash Chandra
Keyword(s):  
Optical Properties ◽  
Conducting Polymers ◽  
Radiation Effects ◽  
Ion Beam ◽  
Polymeric Materials ◽  
High Energy ◽  
Ion Beams ◽  
Magnetic Storage ◽  
Structural And Optical Properties ◽  
The Impact

High energy ion beam induced modifications in polymeric materials is of great interest from the point of view of characterization and development of various structures and filters. Due to potential use of conducting polymers in light weight rechargeable batteries, magnetic storage media, optical computers, molecular electronics, biological and thermal sensors, the impact of swift heavy ions for the changes in electrical, structural and optical properties of polymers is desirable. The high energy ion beam irradiation of polymer is a sensitive technique to enhance its electrical conductivity, structural, mechanical and optical properties. Recent progress in the radiation effects of ion beams on conducting polymers are reviewed briefly. Our recent work on the radiation effects of ion beams on conductive polymers is described. The electrical, structural and optical properties of irradiated films were analyzed using V-I, X-Ray diffraction (XRD), scanning electron microscopy (SEM), UV-Visible spectroscopy and Fourier transform infrared spectroscopy methods.

scholarly journals Proton beam irradiation induces invisible modifications under the surface of painted parchment

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Katharina Müller ◽  
Zita Szikszai ◽  
Ákos Csepregi ◽  
Róbert Huszánk ◽  
Zsófia Kertész ◽  
...  
Keyword(s):  
Cross Sections ◽  
Ion Beam ◽  
Analytical Techniques ◽  
Proton Radiation ◽  
Proton Beam Irradiation ◽  
Pixe Analysis ◽  
Spatially Resolved ◽  
Radiation Induced ◽  
Induced Changes ◽  
The Impact

AbstractIon beam analysis plays an important role in cultural heritage (CH) studies as it offers a combination of simultaneous and complementary analytical techniques (PIXE/PIGE/RBS) and spatially resolved mapping functions. Despite being considered non-destructive, the potential risk of beam-induced modifications during analysis is increasingly discussed. This work focuses on the impact of proton beams on parchment, present in our CH in form of unique historical manuscripts. Parchment is one of the organic, protein-based CH materials believed to be the most susceptible to radiation-induced changes. Various modification patterns, observed on parchment cross-sections by optical and electron microscopy are reported: discoloration (yellowing), formation of cavities and denaturation of collagen fibers. Considerable modifications were detected up to 100 µm deep into the sample for beam fluences of 4 µC/cm2 and higher. The presence of ultramarine paint on the parchment surface appears to increase the harmful effects of proton radiation. Based on our results, a maximum radiation dose of 0.5 µC/cm2 can be considered as ‘safe boundary’ for 2.3 MeV PIXE analysis of parchment under the applied conditions.

Conductivity Modulation in Polymer Electrolytes and their Composites due to Ion-Beam Irradiation

2015 ◽  
Vol 239 ◽  
pp. 110-148 ◽  
Author(s):  
Divya Singh ◽  
B. Bhattacharya ◽  
Hardev Singh Virk
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Ion Beam ◽  
Chemical Properties ◽  
Polymer Properties ◽  
Wide Range ◽  
The Matrix ◽  
Radiation Induced ◽  
Induced Changes ◽  
Physical And Chemical

Polymers are a class of materials widely used in different fields of applications. With imminent applications of polymers, the study of radiation induced changes in polymers has become an obvious scientific demand. The bombardment by ion beam radiations has become one of the most promising techniques in present day polymer research. When the polymers are irradiated, a variety of physical and chemical changes takes place due to energy deposition of the radiation in the polymer matrix. Scissoring, cross-linking, recombination, radical decomposition, etc. are some of the interesting changes that are obvious in polymers. The modification in polymer properties by irradiation depends mainly on the nature of radiation and the type of polymer used.Polymer electrolytes are obtained by modifying polymers by doping, complexing, or other chemical processes. In general, they suffer from low conductivity due to high crystallinity of the matrix. The effect of radiation on polymer electrolyte is expected to alter their crystalline nature vis-a-vis electrical properties. This review article shall elaborate modifications in the physical and chemical properties of polymer electrolytes and their composites. The variations in properties have been explored on PEO based polymer electrolyte and correlated with the parameters responsible for such changes. Also a comparison with different types of the polymers irradiated with a wide range of ion beams has been established.

Sign in / Sign up

Export Citation Format

Share Document