Search results for " Gamma irradiation."

showing 3 items of 3 documents

Gamma-ray irradiation tests of CMOS sensors used in imaging techniques

2014

Technologically-enhanced electronic image sensors are used in various fields as diagnostic techniques in medicine or space applications. In the latter case the devices can be exposed to intense radiation fluxes over time which may impair the functioning of the same equipment. In this paper we report the results of gamma-ray irradiation tests on CMOS image sensors simulating the space radiation over a long time period. Gamma-ray irradiation tests were car ried out by means of IGS-3 gamma irradiation facility of Palermo Uni ver sity, based on 60Co sources with dif fer ent ac tiv i ties. To re duce the dose rate and re al ize a nar row gamma-ray beam, a lead-collimation sys tem was pur posely …

Materials scienceimaging technique CMOS image sensor gamma irradiationPixelSettore ING-IND/20 - Misure E Strumentazione Nuclearibusiness.industryImage qualityRadiationimaging techniqueSettore ING-INF/01 - Elettronicagamma irradiationBackground noiseNuclear Energy and EngineeringCMOSCMOS image sensorAbsorbed doseOptoelectronicslcsh:QC770-798lcsh:Nuclear and particle physics. Atomic energy. RadioactivityIrradiationImage sensorSafety Risk Reliability and QualitybusinessNuclear Technology and Radiation Protection
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Gamma-ray irradiation tests on CCD and CMOS sensors used in imaging techniques

2012

Technologically-enhanced electronic devices are used in various fields as space imaging or diagnostic techniques in medicine. The devices can be exposed to intense radiation fluxes over time which may impair the functioning of the same apparatus, in particular in space applications. In this paper we report the results of a gamma irradiation tests on imaging sensors simulating the space radiation over a long time period. Two types of sensors are taken into consideration: CCD (Charge-Coupled Device) sensors and CMOS based on technology MOS (Metal Oxide semiconductor) used for the realization of transistors widely used in consumer electronics. The devices are supplied by Techno System (Italy),…

Settore ING-IND/20 - Misure E Strumentazione NucleariImaging techniques CCD CMOS Gamma irradiation.Settore ING-INF/01 - Elettronica
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Effects of gamma-irradiation on the alpha-tocopherol and fatty acids content of raw unpeeled almond kernels (Prunus dulcis)

2014

Abstract The present study evaluated fatty acid composition and α-tocopherol content of almond as a function of irradiation dose in order to determine dose levels causing minimal undesirable changes to almonds. Raw unpeeled almonds variety Tuono ( Prunus dulcis (Mill.) D. A. Webb) were irradiated using 60 Co source at dose of 0.5, 1.5, 3, 6, 8 and 10 kGy. Both control and irradiated samples were kept frozen and immediately analyzed. The data obtained showed no change in fatty acid compositions up to a dose of 10 kGy; on the contrary, a general trend observed is that increasing the dose of irradiation resulted in the decrease of α-tocopherol content. The study has shown that irradiation is a…

chemistry.chemical_classificationVitaminSettore CHIM/10 - Chimica Degli AlimentiVitamin Emedicine.medical_treatmentfood and beveragesFatty acidγ irradiationSettore CHIM/08 - Chimica FarmaceuticaPrunus dulcischemistry.chemical_compoundchemistryBiochemistrymedicineAlmonds Gamma irradiation Fatty acids a-TocopherolIrradiationTocopherolFood sciencealpha-TocopherolFood Science
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