2024-03-28T11:15:34Z
https://meral.edu.mm/oai
oai:meral.edu.mm:recid/557
2021-12-13T05:17:35Z
1582963788001:1582966489046
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Determination of Density and Water Status of Selected Wood Samples Using Gamma Ray Attenuation Technique
Lay Thi Tar Oo
Due to availability and particular features, wood was one of the first materials used by
mankind with a wide variety of applications. The main purpose of this research paper is to
study important facts of wood sample based on the gamma ray attenuation technique. In this
present research, measurements with three different kinds of wood samples were performed
by using NaI (Tl) detector connected to MCA and a radioactive source of energy 0.662 MeV
obtained from Cs-137 (5Ci, 30.07 yrs) at Experimental Nuclear Laboratory, Mandalay
University. In this study, there are three parts of the experimental work. Firstly, selected
wood samples (Kyun, Pyinkado and In) were measured with different thicknesses and
analyzed with Gamma Vision 32 software to calculate the linear and mass attenuation
coefficients, half value thickness and mean free path as the radiation absorption behaviors.
Secondly, the relation between the percentage of water content and the percentage of the
fractional changes in linear attenuation coefficients was investigated. The preliminary
experiments have also done to understand the variation of water contents and attenuation
coefficients of wood samples. Finally, the density obtained (i) by using the conventional
method; (ii) at 6% moisture level and (iii) by using the nuclear attenuation method was
calculated and compared. The measured and calculated results for the investigated samples
were illustrated in tables and figures.
2018
http://hdl.handle.net/20.500.12678/0000000557
https://meral.edu.mm/records/557