TY - GEN
T1 - Development of precise radiation mapping of sedimentary cores using imaging plate
AU - Sugihara, M.
AU - Tsuchiya, Noriyoshi
PY - 2007/5/11
Y1 - 2007/5/11
N2 - The marine sedimentary cores were measured by using imaging plate (IP), which is a 2-D radiation detector and has high-resolution, high-sensitivity and detectability of several type of radiation. The same cores were measured by two different devices to evaluate the measuring ability of IP, one is Natural Gamma Logger (NGL), which is a radiation detector in practical use, and another one is X-ray CT Scanner, whose unique value "CT Value" is considered to be proportional to density. Although characteristic dose distributions were found in the organism layer and the volcanic ash layer by using IP, they were not observed by NGL result. It means IP have enough resolution and sensitivity to comprehend the distribution of substances in the marine sediment. The dose distributions measured by using IP and CT Values showed good correlations. Taken into consideration the fact that CT Value is proportional to density, it could be said that doses tend to depend density in marine sediments. The high-dose point was found by using IP, but it was not observed by the results of NGL and X-ray CT scanner. It implies that IP could be a new nondestructive device to discover the target point.
AB - The marine sedimentary cores were measured by using imaging plate (IP), which is a 2-D radiation detector and has high-resolution, high-sensitivity and detectability of several type of radiation. The same cores were measured by two different devices to evaluate the measuring ability of IP, one is Natural Gamma Logger (NGL), which is a radiation detector in practical use, and another one is X-ray CT Scanner, whose unique value "CT Value" is considered to be proportional to density. Although characteristic dose distributions were found in the organism layer and the volcanic ash layer by using IP, they were not observed by NGL result. It means IP have enough resolution and sensitivity to comprehend the distribution of substances in the marine sediment. The dose distributions measured by using IP and CT Values showed good correlations. Taken into consideration the fact that CT Value is proportional to density, it could be said that doses tend to depend density in marine sediments. The high-dose point was found by using IP, but it was not observed by the results of NGL and X-ray CT scanner. It implies that IP could be a new nondestructive device to discover the target point.
KW - Imaging plate
KW - Marine sediment
KW - Natural radioactivity
KW - Radiation image
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U2 - 10.1063/1.2721248
DO - 10.1063/1.2721248
M3 - Conference contribution
AN - SCOPUS:34248181579
SN - 0735404038
SN - 9780735404038
T3 - AIP Conference Proceedings
SP - 53
EP - 56
BT - WATER DYANMICS
T2 - 4th International Workshop on Water Dynamics
Y2 - 7 November 2006 through 8 November 2006
ER -