Evaluation of Gas Injection Capacity of Gas Injection Wells in Reservoir-Type Gas Storage
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Proceedings of the International Field Exploration and Development Conference 2023 : Vol. 9. :837-845
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Zhao, Xing;Tao, Zheng-wu;Liu, Jia-yuan;Zhang, Meng-qi;Wang, Ping;Chen, Zhon...
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Proceedings of the International Field Exploration and Development Conference 2023 : Vol. 9. :837-845
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Carbon Dioxide Flooding Feasibility of Well Groups in Ultra-deep High Temperature, High Pressure and High Salt Reservoirs - An Example from the Donghe 6 Block of Tarim Oilfield
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Proceedings of the International Field Exploration and Development Conference 2023 : Vol. 9. :592-600
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Tao, Zheng-wu;Zhou, Dai-yu;Wang, Ru-jun;Chen, Bai-yanyue;Chang, Lun-jie;Wu,...
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Proceedings of the International Field Exploration and Development Conference 2023 : Vol. 9. :592-600
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Improvement and application of trial operation technology for LNG receiving terminal
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You-qi chuyun, Vol 42, Iss 12, Pp 1383-1389 (2023)
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LIU Yang
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You-qi chuyun, Vol 42, Iss 12, Pp 1383-1389 (2023)
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LNG receiving terminal, as an important transfer station for China to receive imported...
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Improvement and application of trial operation technology for LNG receiving terminal
You-qi chuyun, Vol 42, Iss 12, Pp 1383-1389 (2023)
LNG receiving terminal, as an important transfer station for China to receive imported LNG resources, still has problems such as high trial operation costs, large material consumption and long trial operation time. In response to this, technology improvement was implemented in the four processes of pipeline precooling, unloading pipeline filling, tank precooling and BOG system trial operation based on the trial operation of the LNG receiving terminal of PipeChina Shenzhen Natural Gas Co. Ltd., and the trial operation technology was applied practically. The results show that: pipeline precooling with liquid nitrogen could realize the precooling and filling of the unloading pipeline, the wharf circulation pipeline for cold insulation and the low-pressure LNG export pipeline at the same time, and the nitrogen can be recycled after precooling the unloading pipeline. Besides, the precooling of the next tank can be started while the first precooled tank is unloaded at a small flow. Thus, the two precooled tanks can be unloaded at full flow simultaneously. In addition, the improved technology optimization method effectively reduces the material consumption of trial operation, saves the trial operation cost, and shortens the time for trial operation, thereby ensuring the safety of trial operation. Generally, the research results could provide a practical reference for the safe,stable and efficient trial operation of LNG receiving terminals.
Subject terms:
lng receiving terminal - trial operation - process improvement - liquid nitrogen precooling - tank precooling - test process - Oils, fats, and waxes - TP670-699 - Gas industry - TP751-762Content provider:
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Characteristic analysis of the cryogenic permanent magnet synchronous motor for the submerged LNG pump
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2017 20th International Conference on Electrical Machines and Systems (ICEMS) Electrical Machines and Systems (ICEMS), 2017 20th International Conference on. :1-4 Aug, 2017
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Chao, Guo;Jiabao, Wang;Shoudao, Huang;Yaojing, Feng
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2017 20th International Conference on Electrical Machines and Systems (ICEMS) Electrical Machines and Systems (ICEMS), 2017 20th International Conference on. :1-4 Aug, 2017
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Calculation method of excess air ratio for blast furnace gas fired boiler
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2017 2nd International Conference Sustainable and Renewable Energy Engineering (ICSREE) Sustainable and Renewable Energy Engineering (ICSREE), 2017 2nd International Conference. :19-22 May, 2017
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Liu, Xuemin;Guan, Jian;Wang, Zhao;Qi, Guoli
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2017 2nd International Conference Sustainable and Renewable Energy Engineering (ICSREE) Sustainable and Renewable Energy Engineering (ICSREE), 2017 2nd International Conference. :19-22 May, 2017
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Advances in Soil Pollution and Geotechnical Environment
Bai, Bing
This is a reprint of articles from the Special Issue published online in the open acce...
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Advances in Soil Pollution and Geotechnical Environment
2022
This is a reprint of articles from the Special Issue published online in the open access journal Applied Sciences (ISSN 2076-3417). This book addresses the most recent developments in soil pollution and restoration, contaminant hydrology, and ground disturbance to stimulate fruitful technical and scientific interactions between professionals.
Subject terms:
groundwater - hydrochemistry - hexavalent chromium contamination - water chemistry simulation - construction disturbance - replacement of embankment - foamed cement banking technology - post-construction settlement - method of replacement thickness calculation - steam injection - ethanol - azeotropic temperature - heterogeneous aquifers - nitrobenzene - microbially induced carbonate precipitation (MICP) - unsaturated soil - soil-water characteristic curves - matrix suction - microstructure - molecular dynamics - mechanical properties - montmorillonite - basal spacing - long-term freeze–thaw cycles - composite heavy metal contamination - morphological analysis - solidification/stabilization - groundwater level fluctuation zone - nitrogen - migration and transformation - HYDRUS-1D model - kinetic adsorption and desorption - groundwater table fluctuations - Pb - migration - experimental study - unsaturated subgrade - capillary barrier - distress control of wetting - xanthan gum - silt - water retention capacity - strength - wetting process - microscopic tests - overconsolidation effect - thermal pore water pressure - calculation method - saturated clay - additives - compacted clay cover - moisture retention - gas diffusion barrier - hydraulic conductivity - tidal action - silty-clay soil - riparian hyporheic zone - inorganic nitrogen - occurrence characteristics - influencing factors - thema EDItEUR:T Technology, Engineering, Agriculture, Industrial processes:TB Technology: general issues - thema EDItEUR:T Technology, Engineering, Agriculture, Industrial processes:TB Technology: general issues:TBX History of engineering and technology - thema EDItEUR:T Technology, Engineering, Agriculture, Industrial processes:TQ Environmental science, engineering and technologyContent provider:
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DSMC calcuations for a 70⁰ blunted cone at 3.2km/s in nitrogen [microform] / J.N. Moss and J.M. Price, V.K. Dogra .
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DSMC calcuations for a 70⁰ blunted cone at 3.2km/s in nitrogen [microform] / J.N. Moss and J.M. Price, V.K. Dogra .; 01/01/1995
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Moss, J. N.
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DSMC calcuations for a 70⁰ blunted cone at 3.2km/s in nitrogen [microform] / J.N. Moss and J.M. Price, V.K. Dogra .; 01/01/1995
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DSMC calcuations for a 70⁰ blunted cone at 3.2km/s in nitrogen [microform] / J.N. Moss and J.M. Price, V.K. Dogra .
DSMC calcuations for a 70⁰ blunted cone at 3.2km/s in nitrogen [microform] / J.N. Moss and J.M. Price, V.K. Dogra .; 01/01/1995
Subject terms:
Aerothermodynamics. - Blunt bodies. - Computational fluid dynamics. - Conical bodies. - Hypersonic flow. - Monte Carlo method. - Near wakes. - Nitrogen. - Rarefied gas dynamics. - Wind tunnel tests.Content provider:
Government Printing Office Catalog
Feature Papers in Compounds
Mejuto, Juan C.
This book represents a collection of contributions in the field of the synthesis and c...
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Feature Papers in Compounds
2022
This book represents a collection of contributions in the field of the synthesis and characterization of chemical compounds, natural products, chemical reactivity, and computational chemistry. Among its contents, the reader will find high-quality, peer-reviewed research and review articles that were published in the open access journal Compounds by members of the Editorial Board and the authors invited by the Editorial Office and Editor-in-Chief.
Subject terms:
atropisomerism - 4,4′-bipyridine - pyridine N-oxidation - halogenation - halogen bond - cyanation - Finkelstein reaction - Suzuki coupling - Orchis - scent - gas chromatography - mass spectrometry - solid-phase microextraction - quantum chemistry - computational chemistry - molecular dynamics - modeling - open-source software - proprietary software - Himantoglossum - solid phase microextraction - iodination - alkanes - alkenes - alkynes - alkyl carbonyls - elemental iodine - iodides - Zutano variety - avocado oil - Soxhlet extraction - ultrasound-assisted extraction - volatiles - ripening - over-ripe - HS-SPME–GC–MS - Basilicata - Barlia robertiana - Himantoglossum robertianum - mantel test - Orchidaceae - pollination syndrome - Italy - volatile compounds - solvolysis - aryldiazonium ions - perchlorate anions - silicon carbide (SiC) - 3C-SiC powder - 4H-SiC crystal - impurities - photoluminescence - pnictogen bonding - nitrogen as pnictogen bond donor - geometries - crystal structure analysis - ICSD and CSD database analyses - MESP characterizations - sum of the van der Waals radii concept - Dactylorhiza - volatile organic compounds - thiosemicarbazone - metal complexes - DNA interactions - biological activity - thiazolidinedione - microwave synthesis - compound library - rosiglitazone - Knoevangel condensation - biodiesel production - crude glycerin - carbon materials - thema EDItEUR:T Technology, Engineering, Agriculture, Industrial processes:TB Technology: general issues - thema EDItEUR:T Technology, Engineering, Agriculture, Industrial processes:TD Industrial chemistry and manufacturing technologies:TDC Industrial chemistry and chemical engineeringContent provider:
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Ambient Air Quality in the Czech Republic
Hůnová, Iva
Ambient air quality in the present-day Czech Republic (CR), one of the two succession ...
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Ambient Air Quality in the Czech Republic
2021
Ambient air quality in the present-day Czech Republic (CR), one of the two succession countries of Czechoslovakia post-1993, was perceived as a major problem with severe human health and environmental consequences, particularly between the 1970s and 1990s. Since that time, the ambient air quality in the CR has improved substantially, due to newly introduced stringent legislation and technical countermeasures. Nevertheless, there are still activities which represent significant emission sources, such as local heating and increased vehicle travel through communities. After a substantial decrease in emissions in both the CR and its neighbouring countries, the levels of some ambient air pollutants from the 2000s are still not satisfactory. In this respect, aerosol, ground-level ozone, and benzo[a]pyrene remain major problems, as they do elsewhere in Europe. The book provides a valuable update both on time trends and spatial changes in ambient air quality, and highlights the recent activities in both monitoring and modelling of principle ambient air pollutants in the CR.
Subject terms:
air pollution - air quality - 1950–2018 - Czechoslovakia - emissions - aerosol - ground-level ozone - atmospheric deposition - health outcomes - environmental issues - particles - traffic - dispersion - PM10 - pollution - F-gases - greenhouse gases - global warming potential - substitutes for ozone depleting substances - Czech Republic - microsensors - particle counter - gas analyzers - relative humidity - mixing layer height - ceilometer - suspended particulate matter - Czech-Polish border - urban parks - particulate matter - nitrogen oxides - ozone - PM pollution - seasonality - meteorological conditions - source apportionment - PMF (Positive Matrix Factorization) - PM2.5 - long-term trends - background scale - locomotives - non-road engines - rail - diesel-electric - real-world emissions - portable on-board emissions monitoring systems - NOx - real driving emissions - urban canopy - weather prediction - validation - PM1 aerosol - elements - water-soluble ions - factor analysis - benzo(a)pyrene - ambient air concentrations - spatial-temporal - population exposure - transboundary transport - meteorological factors - monitoring stations - Passing–Bablok test - regression analysis - statistical modeling - analysis of variance - tower - high-volume sampler - wind-direction-dependent sampling - neutron activation analysis - elemental composition - cross-border pollution transport - AIR BORDER - Czech-Polish borderlands - Interreg - NO2 - passive sampler - Dieselgate - Prague - traffic volume - citizen science - public policy - health effects - thema EDItEUR:G Reference, Information and Interdisciplinary subjects:GP Research and information: general - thema EDItEUR:K Economics, Finance, Business and Management:KC Economics:KCV Economics of specific sectors:KCVG Environmental economics - thema EDItEUR:T Technology, Engineering, Agriculture, Industrial processes:TQ Environmental science, engineering and technology:TQK Pollution controlContent provider:
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Research of Mechanisms of Destruction of Seals at High Temperatures
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Proceedings of the 6th International Conference on Industrial Engineering (ICIE 2020) : Volume I. :1221-1227
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Asheichik, A.;Zorin, D.;Cavas-Martínez, Francisco, Series Editor;Chaari, Fa...
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Proceedings of the 6th International Conference on Industrial Engineering (ICIE 2020) : Volume I. :1221-1227
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Effects of gas pressure and protrusion length of melt delivery tube on powder size and powder morphology of nitrogen gas atomised tin powders.
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Powder Metallurgy. Dec2006, Vol. 49 Issue 4, p349-354. 6p. 9 Diagrams, 1 Chart, 2 Graphs.
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Aksoy, A.;Ünal, R.
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Powder Metallurgy. Dec2006, Vol. 49 Issue 4, p349-354. 6p. 9 Diagrams, 1 Chart, 2 Graphs.
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Gas atomisation is one of the most commercially used methods for producing metal powde...
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Effects of gas pressure and protrusion length of melt delivery tube on powder size and powder morphology of nitrogen gas atomised tin powders.
Gas atomisation is one of the most commercially used methods for producing metal powders. It is known as the break-up of a liquid metal into fine droplets by gas jets. In the present study, tin powders were produced using a supersonic nozzle in a close coupled gas atomisation system. Atomisation pressure and the protrusion length of the melt delivery tube were varied, and the effects of those variables on powder mean size, powder morphology and gas /melt mass flow ratio were investigated. The powder size decreased with increasing atomisation pressure. The reason of the increase in the gas /melt mass ratio with shorter protrusion length is a decrease in the melt mass flow rate, although the gas mass flow rate is constant at the same pressure. A decrease in the melt mass flow rate is caused by the effect of recirculation zone acting on the tip of the melt delivery tube. The produced tin powders had spherical shapes and clean surfaces. [ABSTRACT FROM AUTHOR]
Powder Metallurgy. Dec2006, Vol. 49 Issue 4, p349-354. 6p. 9 Diagrams, 1 Chart, 2 Graphs.
Subject terms:
LIQUID metals - NITROGEN as a test gas - POWDER metallurgy - SUPERSONIC nozzles - ATOMIZATIONContent provider:
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Experimental investigation of hydrate formation in a high pressure cell and comparison of the results with thermodynamic models
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2010 International Conference on Chemistry and Chemical Engineering Chemistry and Chemical Engineering (ICCCE), 2010 International Conference on. :204-207 Aug, 2010
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Najibi, S. Hesam;Abkhiz, Vahid;Naderi, Ali;Kordestani, Amin
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2010 International Conference on Chemistry and Chemical Engineering Chemistry and Chemical Engineering (ICCCE), 2010 International Conference on. :204-207 Aug, 2010
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The requirement of hemodialysis in patients with acute gastroenteritis–induced acute kidney injury
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Journal of Family Medicine and Primary Care, Vol 10, Iss 6, Pp 2423-2427 (2021)
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Supriyaa Bhakthavatchalam;Devasena Srinivasan;R Prithviraj
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Journal of Family Medicine and Primary Care, Vol 10, Iss 6, Pp 2423-2427 (2021)
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Acute gastroenteritis is an important cause of preventable acute kidney injury (AKI). ...
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The requirement of hemodialysis in patients with acute gastroenteritis–induced acute kidney injury
Journal of Family Medicine and Primary Care, Vol 10, Iss 6, Pp 2423-2427 (2021)
Acute gastroenteritis is an important cause of preventable acute kidney injury (AKI). Inadequate or delayed restoration of diarrheal losses results in a very high incidence of AKI. Diarrheal illness is a major reason for hospitalization, but data on consequent acute kidney injury are sparse. The objective of the study is to determine the incidence of AKI in infectious and noninfectious diarrheal illness requiring hospitalization and to identify correlates and outcomes of diarrhea-associated AKI. None of the patients had any organism isolated in stool, probably due to prompt initiation of antibiotics/inadequate culture growth. Three out of our 6 cases did not require hemodialysis (HD) and AKI resolved on conservative management alone (fluids, electrolyte management, and antibiotics). Three out of 6 cases had nonresolving AKI and were dependent on renal replacement therapy (RRT) even at 1 month after discharge as they remained oliguric. One recent paper has reported the recovery of renal function after a period of dialysis. Frequent electrolyte abnormalities, risk of (catheter-related/bloodstream) infections, and severity of the primary disease are the chief reasons for the persistently high morbidity. Although, there was no mortality in our study.
Subject terms:
abg – arterial blood gas - age – acute gastroenteritis - aki – acute kidney injury - bun – blood urea nitrogen - dm – diabetes mellitus - hd – hemodialysis - htn – hypertension - lft – liver function test - rft – renal function test - MedicineContent provider:
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A Solid Nitrogen Cooled Linear Levitating System Based on \MgB2 Bulks.
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IEEE Transactions on Applied Superconductivity. Jun2015 Part 2, Vol. 25 Issue 3, p1-5. 5p.
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Fabbri, Massimo;Morandi, Antonio;Perini, Elena;Giunchi, Giovanni
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IEEE Transactions on Applied Superconductivity. Jun2015 Part 2, Vol. 25 Issue 3, p1-5. 5p.
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An innovative linear levitating system based on \MgB2 bulks produced by the reactive l...
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A Solid Nitrogen Cooled Linear Levitating System Based on \MgB2 Bulks.
IEEE Transactions on Applied Superconductivity. Jun2015 Part 2, Vol. 25 Issue 3, p1-5. 5p.
An innovative linear levitating system based on \MgB2 bulks produced by the reactive liquid infiltration method is designed and built. Details of the system are presented. The levitation performance is also evaluated by means of previous experimental data. The linear levitating system consists of four \MgB2 arc-shaped tiles lodged inside a double-shell Dewar sliding on a guide made of Nd-Fe-B permanent magnets. The magnets on the guide are properly arranged in a flux shaper configuration in order to produce maximum stiffness. Each \MgB2 bulk has a curvature radius of 165 mm (arc length of 200 mm), thickness of 10 mm, and width of 70 mm. The system is cooled by means of a solid nitrogen heat sink. Helium gas supply to a heat exchanger is used in order to cool down the \MgB2 slabs and the nitrogen at a temperature in the range of 20–30 K. When the flow of helium gas is interrupted, the temperature of the solid nitrogen remains below 39 K for half an hour. During this time interval, levitation measurements can be performed. Experimental verification of the cooling concept has been carried out successfully. [ABSTRACT FROM PUBLISHER]
Subject terms:
LINEAR systems - NITROGEN as a test gas - MAGNETIC suspension - MAGNETIC bearings - HEAT exchangersContent provider:
Business Source Premier
Failure and mitigation study of packer in the deepwater HTHP gas well considering the temperature-pressure effect during well completion test
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Case Studies in Thermal Engineering, Vol 26, Iss , Pp 101021- (2021)
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Cheng Li;Zhichuan Guan;Bo Zhang;Qing Wang;Hongqiao Xie;Yan Yan;Chao Han
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Case Studies in Thermal Engineering, Vol 26, Iss , Pp 101021- (2021)
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During the well completion test of deepwater high temperature and high pressure (HTHP)...
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Failure and mitigation study of packer in the deepwater HTHP gas well considering the temperature-pressure effect during well completion test
Case Studies in Thermal Engineering, Vol 26, Iss , Pp 101021- (2021)
During the well completion test of deepwater high temperature and high pressure (HTHP) gas well, the force on the packer changes dramatically, leading to the packer failure and serious consequences. Take consideration of the temperature-pressure effect, the packer force calculation model and the failure judgement flow diagram of packer are established based on the theory of tubing mechanics, the law of momentum conservation, and the liquid PVT properties to evaluate the reliability of packer. Dimensionless formulations to obtain the axial force and the pressure difference are proposed, and ten influencing and controllable factors are chosen to the sensitivity analysis. The results show that seven factors have great influence on the axial force and the pressure difference. Finally, two mitigation methods, installing slip joint on the tubing string and injecting nitrogen gas in the annulus, are studied for axial force and pressure difference, and the concept and calculation method of axial force safety factor are put forward. The mitigation effect of these two methods are all obvious. This study can provide theoretical guidance for packer protection during well completion test of deepwater HTHP gas well, thus can contribute to the development of natural gas and even the mitigation of greenhouse effect.
Subject terms:
Well completion test - Deepwater HTHP well - Packer - Reliability evaluation - Dimensionless study - Nitrogen gas injection - Engineering (General). Civil engineering (General) - TA1-2040Content provider:
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Flow velocity measurements in nitrogen plumes stimulated by REMPI
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20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. Instrumentation in aerospace simulation facilities Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. 20th International Congress on. :304-308 2003
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Dankert, C.;Mori, H.
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20th International Congress on Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. Instrumentation in aerospace simulation facilities Instrumentation in Aerospace Simulation Facilities, 2003. ICIASF '03. 20th International Congress on. :304-308 2003
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Comparison of dissolved gas -in-oil analysis methods using a dissolved gas -in-oil standard
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IEEE Electrical Insulation Magazine IEEE Electr. Insul. Mag. Electrical Insulation Magazine, IEEE. 27(5):29-35 Oct, 2011
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Lelekakis, N.;Martin, D.;Guo, W.;Wijaya, J.
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IEEE Electrical Insulation Magazine IEEE Electr. Insul. Mag. Electrical Insulation Magazine, IEEE. 27(5):29-35 Oct, 2011
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Raman scattering measurements within a flat plate boundary layer in an inductively coupled plasma wind tunnel.
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Journal of Applied Physics; 8/1/2007, Vol. 102 Issue 3, p033303, 8p, 2 Diagrams, 2 Charts, 9 Graphs
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Studer, Damien;Vervisch, Pierre
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Journal of Applied Physics; 8/1/2007, Vol. 102 Issue 3, p033303, 8p, 2 Diagrams, 2 Charts, 9 Graphs
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High temperature air chemistry is a crucial issue concerning next reusable space vehic...
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Raman scattering measurements within a flat plate boundary layer in an inductively coupled plasma wind tunnel.
Journal of Applied Physics; 8/1/2007, Vol. 102 Issue 3, p033303, 8p, 2 Diagrams, 2 Charts, 9 Graphs
High temperature air chemistry is a crucial issue concerning next reusable space vehicle thermal protection system. The aim of this paper is to measure N2 and O2 densities and characteristic temperatures thanks to spontaneous Raman scattering within the boundary layer of a stainless steel flat plate cooled down at 300 K. This shear-flow test configuration is considered as a nonequilibrium air plasma test case. Vibrational and rotational temperatures are determined by comparing experimental spectra with computed ones. The density calculation is performed using the ratio of first vibrational transition intensities for both cases with and without plasma at 38 hPa. Several sections were investigated between 15 and 40 mm from the leading edge. All these sections exhibit a classical boundary layer pattern. The rotational temperature is completely in equilibrium with the plate and reaches 2500 K at the outer edge of the boundary layer. On the contrary, the vibrational temperature drops to 1500 K near of the plate and is about 5000 K in the freestream. Molecular densities are smaller than expected at equilibrium, about 60% of the equilibrium value in the freestream for N2 . [ABSTRACT FROM AUTHOR]
Subject terms:
HIGH temperature chemistry - SPACE vehicle heat shielding - THERMAL shielding - RAMAN effect - STAINLESS steel - BOUNDARY layer (Aerodynamics) - DENSITY - NITROGEN as a test gas - OXYGEN - THERMAL propertiesContent provider:
Complementary Index
Optogalvanic spectroscopy of the C ″ 5Πui-A′ 5Σg+ electronic system of N2.
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Journal of Chemical Physics; 11/28/2006, Vol. 125 Issue 20, p204308-N.PAG, 11p, 7 Charts, 3 Graphs
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Pirali, O.;Tokaryk, D. W.
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Journal of Chemical Physics; 11/28/2006, Vol. 125 Issue 20, p204308-N.PAG, 11p, 7 Charts, 3 Graphs
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We have recorded spectra involving the 3-1, 4-2, 2-0, and 2-2 bands of the C
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Optogalvanic spectroscopy of the C ″ 5Πui-A′ 5Σg+ electronic system of N2.
Journal of Chemical Physics; 11/28/2006, Vol. 125 Issue 20, p204308-N.PAG, 11p, 7 Charts, 3 Graphs
We have recorded spectra involving the 3-1, 4-2, 2-0, and 2-2 bands of the C″ 5 Πui -A′ 5 using optogalvanic detection in a discharge through a supersonic jet expansion of argon mixed with a trace of nitrogen gas . The spectra have an effective rotational temperature of about 45 K. They involve all five spin-orbit components of the Cg + electronic system of N2 using optogalvanic detection in a discharge through a supersonic jet expansion of argon mixed with a trace of nitrogen gas. The spectra have an effective rotational temperature of about 45 K. They involve all five spin-orbit components of the C″ 5 Πui state, which has allowed for precise determination of the spin-orbit coupling in this state. Analysis of the C″ 5 Πui state Λ-doubling shows that it is caused primarily by a first-order spin-spin effect rather than by interaction with Σu ± states. Our results allow us to assign lines in the 4-2 and 2-0 bands observed in a fluorescence depletion experiment conducted over ten years ago [Ch. Ottinger and A. F. Vilesov, J. Chem. Phys. 103, 9929 (1995)], and to comment on the suggestion that perturbations to the C 3 Πu v=1 level of N2 arise from interactions with the C″ 5 Πui state. [ABSTRACT FROM AUTHOR]
Subject terms:
OPTOGALVANIC spectroscopy - SPIN excitations - ARGON plasmas - NITROGEN as a test gas - FLUORESCENCE - QUANTUM perturbationsContent provider:
Complementary Index
Optical properties and structure characterization of sapphire after Ni ion implantation and annealing.
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Journal of Applied Physics; 10/1/2005, Vol. 98 Issue 7, p073524, 5p, 1 Black and White Photograph, 1 Chart, 6 Graphs
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Xiang, X.;Zu, X. T.;Bao, J. W.;Zhu, S.;Wang, L. M.
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Journal of Applied Physics; 10/1/2005, Vol. 98 Issue 7, p073524, 5p, 1 Black and White Photograph, 1 Chart, 6 Graphs
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Implantation of 64 keV Ni ions to sapphire was conducted at room temperature to 1×10
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Optical properties and structure characterization of sapphire after Ni ion implantation and annealing.
Journal of Applied Physics; 10/1/2005, Vol. 98 Issue 7, p073524, 5p, 1 Black and White Photograph, 1 Chart, 6 Graphs
Implantation of 64 keV Ni ions to sapphire was conducted at room temperature to 1×1017 ions/cm2 with a current density of 5 or 10 μA/cm2 . Metallic Ni nanoparticles were formed with the 5 μA/cm2 ion current and the NiAl2 O4 compound was formed with the 10 μA/cm2 ion current. The crystals implanted with both current densities were annealed isochronally for 1 h at temperatures up to 1000 °C in steps of 100 °C in an ambient atmosphere. Optical absorption spectroscopy, x-ray diffraction, transmission electron microscopy (TEM), and x-ray photoelectron spectroscopy have been utilized to characterize the samples. The surface plasmon resonance (SPR) absorption band peaked at 400 nm due to the Ni nanoparticles shifted toward the longer wavelength gradually with the annealing temperature increasing from 400 to 700 °C. The SPR absorption band disappeared after the annealing temperature reached 800 °C. NiO nanoparticles were formed at the expense of Ni nanoparticles with an increasing annealing temperature. The TEM analyses revealed that the nanoparticles grew to 6–20 nm and migrated toward the surface after annealing at 900 °C. The absorption band at 430 nm from Ni2+ cations in NiAl2 O4 did not shift with the increasing annealing temperature. [ABSTRACT FROM AUTHOR]
Subject terms:
PHOTOELECTRON spectroscopy - SAPPHIRES - OPTICAL properties - ION implantation - NITROGEN as a test gas - IONIC structure - ELECTRON spectroscopy - MOLECULAR spectroscopyContent provider:
Complementary Index
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