JOURNAL ARTICLE

Hydrogen transfer reactions via organic radicals in gamma-irradiated chibaite.

  • Published In: Radiation Protection Dosimetry, 2023, v. 199, n. 14. P. 1646 1 of 3

  • Database: Applied Science & Technology Source Ultimate 2 of 3

  • Authored By: Yokoyama, Yuka; Isogai, Shusuke; Kusuki, Kenta; Tani, Atsushi; Nishido, Hirotsugu 3 of 3

Abstract

This article investigates hydrogen transfer reactions in chibaite, a silica-framework clathrate mineral containing cage-like voids occupied by hydrocarbons, to assess their impact on electron spin resonance (ESR) dating. Gamma-irradiated chibaite samples exhibited methyl, ethyl, n-propyl, isopropyl, and tert-butyl radicals, with hydrogen transfer reactions occurring around 240 K that convert ethyl and isopropyl radicals into tert-butyl radicals. The activation energy for these reactions in chibaite is higher than in analogous clathrate hydrates, likely due to its covalent silica framework. Since these reactions complete below environmental temperatures, they are unlikely to bias ESR dating results, supporting the reliability of ESR methods for determining chibaite's formation age.

Additional Information

  • Source:Radiation Protection Dosimetry. 2023/09, Vol. 199, Issue 14, p1646
  • Document Type:Article
  • Subject Area:Physics
  • Publication Date:2023
  • ISSN:01448420
  • DOI:10.1093/rpd/ncad151
  • Accession Number:172001579
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