Mass attenuation coefficient and water content determination of Jamun (syzygium cumini) and Sal (shorea robusta) wood using gamma radiation

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dc.contributor.advisorSharma, Rajeev K.
dc.contributor.authorCharanjeet Kaur
dc.date.accessioned2021-10-27T09:37:48Z
dc.date.available2021-10-27T09:37:48Z
dc.date.issued2021
dc.description.abstractWater content in wood is the major parameter for deciding the strength, quality and durability of wood. The water content of wood was determined by calculating its mass attenuation coefficient at various moisture intervals. The mass attenuation coefficient of Jamun and Sal wood samples have been measured using gamma ray spectrometry based on NaI(Tl) scintillation detector at gamma ray energy of 662 keV from radioactive source 137Cs. The semi-logarithmic plots of relative transmission intensity versus thickness were plotted for completely wet and oven-dried wood samples. The mass attenuation coefficient is obtained from the slope of these curves which is further employed to estimate the water content in wood. The mass attenuation coefficient of Jamun wood at fully wet and oven-dried state was found to be 61.9±21.7 cm2/kg and 93.7±18.9 cm2/kg respectively. Also, mass attenuation coefficient of Sal wood at fully wet and oven-dried state was found to be 52.5±16.8 cm2/kg and 86.1±24.5 cm2/kg respectively. The plot of mass attenuation coefficient against the relative water content shows that mass attenuation coefficient increases linearly with decreasing water content. The variation of water in wood have been studied by placing wood sample in water up to half of its thickness for different time intervals. The calculated moisture gradient curves follow the exponential decay law. These studies may also help to better understand the internal stress and dimensionality or dimensional stability of wood at different water levels. The determination of water content of Jamun and Sal wood using gamma radiations is rapid, more accurate and can be made non-destructive by properly simulating the prototype of this experiment with suitable Monte Carlo simulation in field practices.en_US
dc.identifier.citationCharanjeet Kaur (2021). Mass attenuation coefficient and water content determination of Jamun (syzygium cumini) and Sal (shorea robusta) wood using gamma radiation. (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810177428
dc.keywordsWater Content, Attenuation, Radioactive, Wood, Moisture Gradient, Scintillation Detector, Relative Transmitted Intensityen_US
dc.language.isoEnglishen_US
dc.pages72en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemMass attenuation coefficient and water content determination of Jamun (syzygium cumini) and Sal (shorea robusta) wood using gamma radiationen_US
dc.subAgricultural Physics and Meteorologyen_US
dc.themeMass attenuation coefficient and water content determination of Jamun (syzygium cumini) and Sal (shorea robusta) wood using gamma radiationen_US
dc.these.typeM.Scen_US
dc.titleMass attenuation coefficient and water content determination of Jamun (syzygium cumini) and Sal (shorea robusta) wood using gamma radiationen_US
dc.typeThesisen_US
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