Immediate change of radiation doses from hydrothermal deposits

Shin Toyoda, Fumihiro Sato, Ai Uchida, Jun Ichiro Ishibashi

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)


The radiation from the sulfide deposits taken at Okinawa Trough was measured on-board by a NaI gamma ray spectrometer immediately after the retrieval of the sample onto the research vessel. Gamma ray peaks were identified as those from daughter nuclei of226Ra and228Ra. The slight change with time of the radiation dose from those deposits is probably due to the geometric arrangement in measurements. As results, no change in radiation dose was observed in the time range up to 90 h after retrieval of the samples from the submarine vehicle.

Original languageEnglish
Title of host publicationSubseafloor Biosphere Linked to Hydrothermal Systems
Subtitle of host publicationTAIGA Concept
PublisherSpringer Japan
Number of pages4
ISBN (Electronic)9784431548652
ISBN (Print)9784431548645
Publication statusPublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)


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