scholarly journals The impact of radiation on semiconducting characteristics of monocrystalline silicon and germanium

2016 ◽  
Vol 31 (1) ◽  
pp. 97-101
Author(s):  
Marija Obrenovic ◽  
Djordje Lazarevic ◽  
Srboljub Stankovic ◽  
Nenad Kartalovic
Keyword(s):  
Radiation Effects ◽  
Specific Resistance ◽  
Absorbed Dose ◽  
Monocrystalline Silicon ◽  
Electrical Characteristics ◽  
Radiation Change ◽  
Silicon And Germanium ◽  
Effects Of Radiation ◽  
The Impact ◽  
Good Agreement

The paper examines the effects of radiation on the electrical characteristics of monocrystalline silicon and germanium. Samples of monocrystalline silicon and germanium are irradiated under controlled laboratory conditions in the field of neutron, X- and g-radiation. Change of the samples' specific resistance was measured dependent on the radiation dose with the type of radiation as a parameter. Next, the dependence of the samples resistance on temperature was recorded (in the impurities region and in intrinsic region) with the previously absorbed dose as a parameter. The results were statistically analyzed and explained on the basis of radiation effects in solids. The results are compared with those obtained by using Monte Carlo method. A good agreement was confirmed by the mentioned experimental investigation.

scholarly journals Analysis of Radiation Effects on Workers and Environment Pilot Plant Boron Neutron Capture Therapy (BNCT)

2017 ◽  
Vol 2 (2) ◽  
pp. 75
Author(s):  
Nur Endah Sari ◽  
Yohannes Sardjono ◽  
Andang Widi Harto
Keyword(s):  
Pilot Plant ◽  
Radiation Effects ◽  
Past Research ◽  
Radiation Shielding ◽  
Equivalent Dose Rate ◽  
The Past ◽  
Boron Neutron Capture ◽  
Borated Polyethylene ◽  
Effects Of Radiation ◽  
The Impact

BNCT is a new method in nuclear technology. The aim of BNCT application is to reduce human risk which used to kills cell targeting characteristic. The impact of using this technology should be considered before it is applied, among the effects of radiation on workers and the surrounding environment BNCT pilot plant. A research on modeling of BNCT pilot plant used a collimator for a 30 MeV cyclotron neutron sources which had been designed from the past research. Radiation shielding modeling for treatment room used MCNPX software. The radiation shielding was concrete baryte on each side that includes coated borated polyethylene 2 cm thick and it is featured with a sliding door with dimensions 220 × 87 × 200 cm coated with stainless steels 2 cm thick. Results obtained value equivalent dose rate of neutron and gamma of each 41.5 µSv.h<sup>-1</sup> and 2.05 µSv.h<sup>-1</sup>. Effects of radiation received by workers in the form of deterministic effects did not have a significant are impact.

Radiation Effects on 1.7kV Class 4H-SiC Power Devices: Development of Compact Simulation Models

2019 ◽  
Vol 963 ◽  
pp. 718-721
Author(s):  
Pavel Hazdra ◽  
Stanislav Popelka
Keyword(s):  
Deep Level Transient Spectroscopy ◽  
Radiation Effects ◽  
Deep Level ◽  
Dose Range ◽  
Simulation Models ◽  
Electrical Characteristics ◽  
Power Devices ◽  
Power Mosfets ◽  
Transient Spectroscopy ◽  
Good Agreement

Compact simulation models of two key silicon carbide power components, the Junction Barrier Schottky diode and the power MOSFET, which are taking into account the effect of irradiation by highenergy electrons, were developed. Two 1.7 kV class devices: the 14 A JBS diode C3D10170H and the 5 A SiC power MOSFETs C2M1000170D produced by Wolfspeed were irradiated by 4.5 MeV electrons in the dose range up to 2000 kGy. Electrical characteristics were measured prior to and after irradiation. Radiation defects were studied by deep level transient spectroscopy and the effect of irradiation on device characteristics was established. SPICE models taking into account the irradiation fluence were proposed and calibrated using the parameters extracted from experiment. Simulated characteristics show a very good agreement with reality.

scholarly journals Modeling the impacts of heavy charged particles on electrical characteristics of n-MOSFET device structure

Doklady BGUIR ◽  
2020 ◽  
Vol 18 (7) ◽  
pp. 55-62
Author(s):  
I. Yu. Lovshenko ◽  
V. R. Stempitsky ◽  
V. T. Shandarovich
Keyword(s):  
Charged Particle ◽  
Radiation Effects ◽  
Outer Space ◽  
Charged Particles ◽  
Drain Current ◽  
Heavy Charged Particle ◽  
Electrical Characteristics ◽  
Device Structure ◽  
Heavy Charged Particles ◽  
The Impact

The use of microelectronic products in outer space is possible if protection is provided against special external influencing factors, including radiation effect. For digital integrated circuits manufactured using submicron CMOS processes, the greatest influence is exerted by radiation effects caused by exposure to a heavy charged particle. The use of special design tools in the development of dual-purpose microcircuits, with increased resistance to the impact of heavy charged particles, prevents single events from occurring. Thus, the use of modern software products for device and technological modeling in microelectronics when developing the element base of radiation-resistant microcircuits for space purposes will cut the time to develop new products and make it possible to modernize (improve performance) already existing device and circuitry solutions. The paper delivers the results of modeling the impacts of heavy charged particles with a magnitude of linear energy transfer equal to 1.81, 10.1, 18.8, 55.0 MeV·cm2/mg, corresponding to nitrogen ions 15N+4 with an energy E = 1,87 MeV; argon 40Ar+12 with an energy E = 372 MeV; ferrum 56Fe+15 with an energy E = 523 MeV; xenon 131Xe+35 with an energy E = 1217 MeV, on electrical characteristics of n-MOSFET device structure. The dependences of the maximum drain current IС on the motion trajectory of a heavy charged particle and the ambient temperature are shown.

scholarly journals Upaya Reduksi Penggunaan Gawai Pada Remaja Sebagai Bentuk Tindakan Preventif Dampak Radiasi

2019 ◽  
Author(s):  
Garnis Maharani
Keyword(s):  
Radiation Effects ◽  
Qualitative Case Study ◽  
Online Games ◽  
Case Study Method ◽  
Online Questionnaire ◽  
Technological Developments ◽  
Effects Of Radiation ◽  
Harmful Radiation ◽  
The Impact

Mobile phone is one of the technological developments that are used equally in all ages, including teenagers. Excessive use of devices in adolescents, such as playing online games for hours without end, results in adverse effects, for example the effects of radiation that can interfere with their health because if someone continues to be exposed to radiation then the impact that arises in the future is very fatal. The purpose of writing this article is to make teenagers aware that excessive use of devices will cause harmful radiation effects to them and can make countermeasures to reduce excessive use of devices in adolescents and the effects of radiation that arise. In this article I use a descriptive qualitative case study method by obtaining a sample of research results using an online questionnaire that I distributed to UNS students with a vulnerable age of 17-19 years. From the results it can be seen that the use of devices for UNS students aged 17-19 years who use devices on average more than 7 hours and most of them use devices to access social media and there are some who use devices to play online games. By knowing the intensity of time to use the device for UNS students I can make prevention efforts and conclude whether the use of devices for UNS students is still in the safe class or is excessive.

scholarly journals Upaya Reduksi Penggunaan Gawai Pada Remaja Sebagai Bentuk Tindakan Preventif Dampak Radiasi

2019 ◽  
Author(s):  
Garnis Maharani
Keyword(s):  
Radiation Effects ◽  
Qualitative Case Study ◽  
Online Games ◽  
Case Study Method ◽  
Online Questionnaire ◽  
Technological Developments ◽  
Effects Of Radiation ◽  
Harmful Radiation ◽  
The Impact

Mobile phone is one of the technological developments that are used equally in all ages, including teenagers. Excessive use of devices in adolescents, such as playing online games for hours without end, results in adverse effects, for example the effects of radiation that can interfere with their health because if someone continues to be exposed to radiation then the impact that arises in the future is very fatal. The purpose of writing this article is to make teenagers aware that excessive use of devices will cause harmful radiation effects to them and can make countermeasures to reduce excessive use of devices in adolescents and the effects of radiation that arise. In this article I use a descriptive qualitative case study method by obtaining a sample of research results using an online questionnaire that I distributed to UNS students with a vulnerable age of 17-19 years. From the results it can be seen that the use of devices for UNS students aged 17-19 years who use devices on average more than 7 hours and most of them use devices to access social media and there are some who use devices to play online games. By knowing the intensity of time to use the device for UNS students I can make prevention efforts and conclude whether the use of devices for UNS students is still in the safe class or is excessive.

scholarly journals Heat Generation and Thermal Radiation Effects over a Stretching Sheet in a Micropolar Fluid

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
M. Gnaneswara Reddy
Keyword(s):  
Boundary Layer ◽  
Heat Generation ◽  
Micropolar Fluid ◽  
Radiation Effects ◽  
Stretching Sheet ◽  
Incompressible Micropolar Fluid ◽  
Layer Flow ◽  
Effects Of Radiation ◽  
Generation Parameter ◽  
Good Agreement

The effects of radiation and heat generation on steady thermal boundary layer flow induced by a linearly stretching sheet immersed in an incompressible micropolar fluid with constant surface temperature are investigated. Similarity transformation is employed to transform the governing partial differential equations into ordinary ones, which are then solved numerically using the Runge-Kutta fourth order along shooting method. Results for the local Nusselt number as well as the temperature profiles are presented for different values of the governing parameters. It is observed that the velocity increases with an increase in the material parameter. It is seen that the temperature profile is influenced considerably and increases when the value of heat generation parameter increases along the boundary layer. Also, the temperature distribution of the fluid increases with an increase in the radiation parameter. Comparisons with previously published work are performed and the results are found to be in very good agreement.

scholarly journals Upaya Reduksi Penggunaan Gawai Pada Remaja Sebagai Bentuk Tindakan Preventif Dampak Radiasi

2019 ◽  
Author(s):  
Garnis Maharani
Keyword(s):  
Radiation Effects ◽  
Qualitative Case Study ◽  
Online Games ◽  
Case Study Method ◽  
Online Questionnaire ◽  
Technological Developments ◽  
Effects Of Radiation ◽  
Harmful Radiation ◽  
The Impact

Mobile phone is one of the technological developments that are used equally in all ages, including teenagers. Excessive use of devices in adolescents, such as playing online games for hours without end, results in adverse effects, for example the effects of radiation that can interfere with their health because if someone continues to be exposed to radiation then the impact that arises in the future is very fatal. The purpose of writing this article is to make teenagers aware that excessive use of devices will cause harmful radiation effects to them and can make countermeasures to reduce excessive use of devices in adolescents and the effects of radiation that arise. In this article I use a descriptive qualitative case study method by obtaining a sample of research results using an online questionnaire that I distributed to UNS students with a vulnerable age of 17-19 years. From the results it can be seen that the use of devices for UNS students aged 17-19 years who use devices on average more than 7 hours and most of them use devices to access social media and there are some who use devices to play online games. By knowing the intensity of time to use the device for UNS students I can make prevention efforts and conclude whether the use of devices for UNS students is still in the safe class or is excessive.

scholarly journals Radiation Hardness of Flash Memory Fabricated in Deep-Submicron Technology

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Bojan Cavrić ◽  
Edin Dolićanin ◽  
Predrag Petronijević ◽  
Milić Pejović ◽  
Koviljka Stanković
Keyword(s):  
Ionizing Radiation ◽  
Flash Memory ◽  
Radiation Effects ◽  
Current Problem ◽  
Deep Submicron ◽  
Flash Memories ◽  
Extreme Sensitivity ◽  
Effects Of Radiation ◽  
High Degree ◽  
Good Agreement

This paper discusses the current problem of the electronic memory reliability in terms of the ionizing radiation effects. The topic is actual since the high degree of components' miniaturization integrated into the flash memory causes the extreme sensitivity of this memory type to the ionizing radiation effects. The effects of ionizing radiation may cause changes in stored data, or even the physical destruction of the components. At the end, the experimentally and numerically obtained effects of radiation on specific flash memories are shown and discussed. The results obtained by laboratory and numerical experiments showed good agreement with each other and with the theoretically expected results.

scholarly journals Heat transfer analysis in stretching/shrinking rectangular fin with convection and radiation

2021 ◽  
Author(s):  
Sharif Ullah ◽  
Amir Ali ◽  
Zia Din
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Analytical Solution ◽  
Heat Transfer Analysis ◽  
Combined Effects ◽  
Transform Method ◽  
Differential Transform ◽  
Effects Of Radiation ◽  
The Impact ◽  
Good Agreement

The aim of this work is to enhance the heat transfer and study the efficiency of stretching/shrinking, radiating and rectangular fins. The effect of the dimensionless parameters, that is, radiation-conduction, convection-conduction stretching, thermo-geometric parameters as well as the Peclet number, and surface temperature are investigated on the efficiency of stretching/shrinking and rectangular fins. The considered model is studied analytically using Differential Transform Method (DTM). The result is analyzed with the numerical solution for the accuracy of the semi-analytical solution, where good agreement is obtained. The impact of the considered parameters is studied numerically on the temperature distribution, fin’s tip temperature, and the efficiency of the fin, where the combined effects of radiation and stretching/ shrinking enhance the system in the heat transfer with better efficiency. The shrinking of the fin with radiation increases the efficiency as compared to stretching with radiation is observed, which plays a significant role in mechanical engineering.

scholarly journals Impact of late radiation effects on cancer survivor children: an integrative review

2015 ◽  
Vol 14 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Cibeli Fernandes Coura ◽  
Patrícia Cláudia Modesto
Keyword(s):  
Cancer Survivors ◽  
Late Effects ◽  
Radiation Effects ◽  
Survival Rates ◽  
Childhood Cancer Survivors ◽  
Endocrine Effects ◽  
Pediatric Cancer Survivors ◽  
Effects Of Radiation ◽  
The Impact ◽  
Low Radiation Doses

We aimed to identify the late effects of radiation exposure in pediatric cancer survivors. An integrated literature review was performed in the databases MEDLINE and LILACS and SciELO. Included were articles in Portuguese and English, published over the past 10 years, using the following keywords: “neoplasias/neoplasms” AND “radioterapia/radiotherapy” AND “radiação/radiation”. After analysis, 14 articles - published in nine well-known journals - met the inclusion criteria. The publications were divided into two categories: “Late endocrine effects” and “Late non-endocrine effects”. Considering the increased survival rates in children who had cancer, the impact of late effects of exposure to radiation during radiological examinations for diagnosis and treatment was analyzed. Childhood cancer survivors were exposed to several late effects and should be early and regularly followed up, even when exposed to low radiation doses.

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