Instrumental neutron activation analysis of spherule samples recovered from the Pacific ocean sea sediment and Antarctic ice sheet

S. Sekimoto, T. Kobayashi, K. Takamiya, Mitsuru Ebihara, S. Shibata

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Chemical compositions of spherules separated from deep sea sediment dredged off Hawaiian islands and from Antarctic ice were measured by instrumental neutron activation analysis (INAA) using Kyoto University Reactor (KUR). Iron, cobalt, nickel, iridium, scandium and manganese contents in those spherules were determined to be 19.3-97.7%, 23-4370 mg·kg-1, 0.08-7.04%, 0.84-35.4 mg·kg-1, 1.4-44.3 mg·kg-1 and 93.4 mg·kg-1-7.2 %, respectively, and compared with each other. Particularly, iridium was detected in seven spherules among fourteen from Hawaii, but only one spherule among twenty-two from Antarctic, and those spherules turned out to be extraterrestrial in origin. However, it was shown that there was little difference in characteristics of elemental contents between both kinds of spherules, except for Ir-detected spherules.

Original languageEnglish
Pages (from-to)447-450
Number of pages4
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume272
Issue number3
DOIs
Publication statusPublished - 2007 Jun 1
Externally publishedYes

Fingerprint

Pacific Ocean
Ice Cover
Neutron Activation Analysis
Iridium
Neutron activation analysis
Ice
Oceans and Seas
Sediments
Scandium
Manganese
Cobalt
Nickel
Islands
Iron
Chemical analysis

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

Cite this

Instrumental neutron activation analysis of spherule samples recovered from the Pacific ocean sea sediment and Antarctic ice sheet. / Sekimoto, S.; Kobayashi, T.; Takamiya, K.; Ebihara, Mitsuru; Shibata, S.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 272, No. 3, 01.06.2007, p. 447-450.

Research output: Contribution to journalArticle

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