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Indonesian Journal of Physics最新文献

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A Model Calculation of Temperature and Size Dependent Thermoluminescence Intensity from Silicon Nanostructures 硅纳米结构热释光强度随温度和尺寸变化的模型计算
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2011.22.4.5
N. Debelo
{"title":"A Model Calculation of Temperature and Size Dependent Thermoluminescence Intensity from Silicon Nanostructures","authors":"N. Debelo","doi":"10.5614/itb.ijp.2011.22.4.5","DOIUrl":"https://doi.org/10.5614/itb.ijp.2011.22.4.5","url":null,"abstract":"Thermoluminescence (TL) from silicon nanostructures has received considerable attention in recent years. Despite of some theoretical and experimental investigation, the origin and mechanism of TL is not clearly understood. Most of the bulk materials start showing fascinating behaviors as their size is reduced to nano level. The ability to emit light as a consequence of absorption of energy (luminescence) is one of these exotic behaviors. TL is the thermally stimulated emission of light due to absorption of energy from radiation. So, there is a direct relationship between temperature (due to absorption of heat or radiation) and the TL intensity. Starting from the concept of bulk material, we derive the mathematical expression for the temperature and size dependent TL intensity using model calculation. We specifically calculate the TL intensity as a function of temperature and nanoparticle size.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79270241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanical Alloying of Fe-C System Based Alloy Fe-C系基合金的机械合金化
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2008.19.3.4
N. Rochman
{"title":"Mechanical Alloying of Fe-C System Based Alloy","authors":"N. Rochman","doi":"10.5614/itb.ijp.2008.19.3.4","DOIUrl":"https://doi.org/10.5614/itb.ijp.2008.19.3.4","url":null,"abstract":"This paper reviews the research of the author’s group regarding mechanical alloying (MA) of Fe-C system based alloy over the last ten years. Powder mixtures of Fe-xC-yM (x and y=0~6 mass %, M: additive element such as Mn, Si, Cr) were mechanically alloyed (MAed) by using a planetary ball mill under Ar gas atmosphere for various time up to 100 h. The MAed powders then were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential thermal analysis (DTA). First, effect of MA time on powders particles was described. Effects of other MA conditions such as temperature, rotation speed and additive elements were then discussed in detail. In the Fe-C system based alloys, amorphization of graphite powders occur first during the early stage of MA and super-saturated iron solid solution is then formed and at the same time, the crystallite size becomes smaller. The carbon content reaches its limitation (about 1.30 at %). The condition of MA gave an effect to the alloying process.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77110493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Global innovation program for nanoscience education -How can we use electrons for our future, Hydrogen society- 纳米科学教育全球创新计划-我们如何在未来使用电子，氢社会-
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2008.19.2.2
M. Yamaguchi, Mitsugu Hamasaki, M. Obara, K. Obara, Kenji Watanabe
{"title":"Global innovation program for nanoscience education -How can we use electrons for our future, Hydrogen society-","authors":"M. Yamaguchi, Mitsugu Hamasaki, M. Obara, K. Obara, Kenji Watanabe","doi":"10.5614/itb.ijp.2008.19.2.2","DOIUrl":"https://doi.org/10.5614/itb.ijp.2008.19.2.2","url":null,"abstract":"The change of global climate suggests the requirements of new technologies, which can suppress or improve the atmospheric composition. In this paper, we show a revolutionary car technology to decrease CO2. The key is the change of the fuel, from gasoline to hydrogen+H2O. The fuel revolution generates hydrogen economy and induces new scientific targets. Nanoscience and nanotechnology are most expectable tools. Especially, understanding the varieties of characteristics of materials in electronic level is the most important therma. We propose international collaborations on nanoscience education to promote our knowledge and understanding each other.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85129501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrical Conductivity and Surface Roughness Properties of Ferroelectric Gallium Doped Ba0,5Sr0,5TiO3 (BGST) Thin Films 铁电镓掺杂Ba0,5Sr0,5TiO3 (BGST)薄膜的电导率和表面粗糙度
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2008.19.4.5
I. Irzaman, A. Marwan, A. Arief, R. Hamdani, M. Komaro
{"title":"Electrical Conductivity and Surface Roughness Properties of Ferroelectric Gallium Doped Ba0,5Sr0,5TiO3 (BGST) Thin Films","authors":"I. Irzaman, A. Marwan, A. Arief, R. Hamdani, M. Komaro","doi":"10.5614/itb.ijp.2008.19.4.5","DOIUrl":"https://doi.org/10.5614/itb.ijp.2008.19.4.5","url":null,"abstract":"Ba0.5Sr0.5TiO3 (BST) and gallium doped BST (BGST) thin films were successfully deposited on p-type Si(100) substrates. The thin films were fabricated by the chemical solution deposition (CSD) and spin coating method, with 1.00 M precursor and spinning speed of 3000 rpm for 30 seconds. The post deposition annealing of the 9 films were carried out BST without gallium (BGST 0%) annealing 850OC, BGST 0% annealing 900OC, BGST 0% annealing 950oC, BGST 5% annealing 850oC, BGST 5% annealing 900oC, BGST 5% annealing 950oC, BGST 10% annealing 850oC, BGST 10% annealing 900oC, BGST 10% annealing 950oC for 15 hour in oxygen gas atmosphere, respectively. The resistance and electrical conductivity of the grown thin films are characterized by I-V converter, meanwhile surface roughness of the grown thin films are characterized by atomic force microscopy (AFM) method. The electrical conductivity of the grown thin films BGST due to semiconductor. The results show that resistance and electrical conductivity of the thin film have strong correlation to the annealing temperature, concentration dopant and surface roughness.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89384036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Isotopic Fission-yield Calculation of U-233, U-238 and Th-232 for Fast Energy Spectrum U-233、U-238和Th-232的快速能谱同位素裂变产率计算
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2008.19.1.5
A. Waris, R. Kurniadi, Y. S. Perkasa, S. Suwoto
{"title":"Isotopic Fission-yield Calculation of U-233, U-238 and Th-232 for Fast Energy Spectrum","authors":"A. Waris, R. Kurniadi, Y. S. Perkasa, S. Suwoto","doi":"10.5614/itb.ijp.2008.19.1.5","DOIUrl":"https://doi.org/10.5614/itb.ijp.2008.19.1.5","url":null,"abstract":"An isotopic fission yield calculation method for fast energy spectrum of neutron has been proposed. This method was derived from a systematic of fission mass yield and a nuclei decay probability. The decay probability was calculated from the level density parameters that derived from a new potential function in combining with the shell correction. The potential function is a modified Wood-Saxon potential that we have called as an extended-Wood-Saxon potential. We have employed the data from RIPL-2 (Reference Input Parameter Library-2) in calculating the level density parameter. The calculation shows similar results compared to the isotopic mass yields of JENDL 3.2 for 233U and 232Th.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88258141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Resistivtiy Structure in Kamojang Geothermal Field Derived from CSAMT Data 基于CSAMT资料的Kamojang地热田电阻率结构研究
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2011.22.1.4
E. Mustopa, W. Srigutomo, D. Sutarno, U. Fauzi
{"title":"Resistivtiy Structure in Kamojang Geothermal Field Derived from CSAMT Data","authors":"E. Mustopa, W. Srigutomo, D. Sutarno, U. Fauzi","doi":"10.5614/itb.ijp.2011.22.1.4","DOIUrl":"https://doi.org/10.5614/itb.ijp.2011.22.1.4","url":null,"abstract":"Controlled-source audio frequency magnetotelluric (CSAMT) survey consisting of 60 soundings has been carried out in the Kamojang geothermal field to delineate resistivity structure correlated to the present geothermal reservoir. The transmitter site was located about 3 − 5 km in the south-west of the survey area. The sounding sites were distributed irregularly and the distance between each of them varied from 200 to 500 m, covering the Kamojang Geothermal area. The two dimensional (2D) inversion scheme was applied to interpret the CSAMT data. The results show that the subsurface resistivity structures in the Kamojang geothermal field consists of three types of resistivity features correlated to the existing geothermal reservoir in the area, that is, the overburden (first layer) having resistivity value of 30 – 150 ohm.m and thickness of 30 to 100 m overlaying the intermediate (second) layer which has an extremely low resistivity of 3 – 10 ohm.m with 500 – 1200 m thick. This low resistivity layer can be considered as a hydrothermal alteration zone comprising the impermeable layer or sealing cap rock. Finally, the third layer which is relatively more resistive than the second layer with resistivity of 30 − 100 ohm-m. From the 3D view of the low resistivity anomaly (<10 ohm.m) considered as a hydrothermal alteration zone, it is obtained that altered zone is deep in the south-west and becomes shallow in the north-east of the area.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88467175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The Change in Physical Properties of Bi2Ca2Co2O8 Thermoelectric Materials Induced by Pb and Rare-Earth Dopings Pb和稀土掺杂对Bi2Ca2Co2O8热电材料物理性能的影响
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2011.22.3.6
I. Sutjahja
{"title":"The Change in Physical Properties of Bi2Ca2Co2O8 Thermoelectric Materials Induced by Pb and Rare-Earth Dopings","authors":"I. Sutjahja","doi":"10.5614/itb.ijp.2011.22.3.6","DOIUrl":"https://doi.org/10.5614/itb.ijp.2011.22.3.6","url":null,"abstract":"We report in this paper the change in the physical properties due to dopant effect in Bi2Sr2Co2O8 parent compound system. The doped samples consists of Pb-doped samples (Bi2Sr2Co2O8, x = 0, 0.5, 1.0, 1.5, and 2.0) and RE-doped samples (Bi2-xPbxCa1.9RE0.1Co2O8, RE = Y, La, Pr, Sm, Eu, Gd, and Ho). The structure of this layered oxide system consist of an alternate stack of CoO2 layer and Bi2Sr2O4 block along the c-axis with misfit structure along b-direction. From the analysis of XRD data it is found that the c-axis parameter reduced significantly in the RE-doped samples compared with those of Pb-doped samples, while the value of misfit degree almost the same. The changes in these lattice structures are accompanied by variation in the spin-state of Co-ions and electrical conductivity. We argue that these structural changes and its effect on the electrical transport properties as well as control of the magnetism plays a pivotal role in determining the thermopower in this class of magnetic thermoelectric materials through the entropy of the charge carriers. This, in turn, will determine the thermoelectric performance for application.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78045926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Determination of Energy Dependence Level Density Parameter and its Application in Fission Products Calculation of Pu-238 能量依赖能级密度参数的确定及其在钚-238裂变产物计算中的应用
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2008.19.4.4
A. Waris, R. Kurniadi, Y. S. Perkasa, S. Suwoto
{"title":"Determination of Energy Dependence Level Density Parameter and its Application in Fission Products Calculation of Pu-238","authors":"A. Waris, R. Kurniadi, Y. S. Perkasa, S. Suwoto","doi":"10.5614/itb.ijp.2008.19.4.4","DOIUrl":"https://doi.org/10.5614/itb.ijp.2008.19.4.4","url":null,"abstract":"The energy dependence of level density parameter has been calculated using extended wood-saxon potential. The extended version of potential has deep well parameter that is independent to the nucleon density. The potential is pure central interaction. Although the potential is different from mean field theory, it gives the better result than that of the reference input parameter library-2 (RIPL-2). The application of the level density parameter results in small discrepancies from ENDF results. This method has been adopted in example for calculating fission products of Pu-238.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77115016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural Characteristics of Carbon Nanotubes Fabricated Using Simple Spray Pyrolysis Method 简单喷雾热解法制备碳纳米管的结构特性
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.5614/itb.ijp.2008.19.3.5
K. Khairurrijal, M. Abdullah, M. Rosi, F. A. Noor
{"title":"Structural Characteristics of Carbon Nanotubes Fabricated Using Simple Spray Pyrolysis Method","authors":"K. Khairurrijal, M. Abdullah, M. Rosi, F. A. Noor","doi":"10.5614/itb.ijp.2008.19.3.5","DOIUrl":"https://doi.org/10.5614/itb.ijp.2008.19.3.5","url":null,"abstract":"A simple spray pyrolysis method has successfully used to synthesize carbon nanotubes (CNTs). Their structural characteristics were characterized by employing field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) analysis, and X-ray diffraction (XRD) methods. FE-SEM images confirmed that the diameters of CNTs were in the range of 20 to 80 nm. The average diameter of CNTs increased considerably as the growth temperature increased (above 700 oC). The changes in growth time and ferrocene mass altered the average diameter of CNTs slightly. EDX analysis and XRD patterns indicated that Fe2O3 and Fe3O4, which originate from the oxidation of ferrocene catalyst, are the main impurities of the CNTs. The concentrations of Fe2O3 and Fe3O4 became lower and higher, respectively, for the growth temperatures higher than 700°C because Fe2O3  is the most stable at high temperatures.","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84928519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Study on Void Reactivity of Liquid Metal Fast Breeder Reactor 液态金属快增殖反应堆空穴反应性研究
Indonesian Journal of Physics Pub Date : 2016-11-03 DOI: 10.11561/AESJ.2008S.0.177.0
A. Khakim, T. Yokoyama, H. Ninokata
{"title":"Study on Void Reactivity of Liquid Metal Fast Breeder Reactor","authors":"A. Khakim, T. Yokoyama, H. Ninokata","doi":"10.11561/AESJ.2008S.0.177.0","DOIUrl":"https://doi.org/10.11561/AESJ.2008S.0.177.0","url":null,"abstract":"Liquid Metal Fast Breeder Reactor (LMFBR) usually has positive void reactivity which is not favorable to the reactor safety. Therefore, the void generation should be avoided during normal reactor operation. Design of reactor core should consider the parameters that influence the void reactivity in order to minimize it, should void be generated during an accident. In this study, several parameters have been evaluated to observe their contribution to the overall void reactivity, such as the build-up of minor actinides (MAs), different inner and outer core height, heterogeneous core configuration, upper plenum, upper axial blanket, voiding in the inner and outer core and the effect of P/D. The study is performed in 3-D heterogeneous geometry using Monte Carlo Method of MVP Code with JENDL-3.3","PeriodicalId":13535,"journal":{"name":"Indonesian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82966274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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