Development of precise radiation mapping of sedimentary cores using imaging plate

M. Sugihara, Noriyoshi Tsuchiya

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish
Title of host publicationWATER DYANMICS
Subtitle of host publication4th International Workshop on Water Dynamics
Number of pages4
Publication statusPublished - 2007 May 11
Event4th International Workshop on Water Dynamics - Sendai, Japan
Duration: 2006 Nov 72006 Nov 8

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other4th International Workshop on Water Dynamics


  • Imaging plate
  • Marine sediment
  • Natural radioactivity
  • Radiation image

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science
  • Physics and Astronomy(all)
  • Nature and Landscape Conservation


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