²³⁴U/²³⁸U ratios in the groundwater samples from Musashino-daichi, western Tokyo

• MITSUDA Hiroshi

  Department of Chemistry, Gakushuin University

• TANAKA Kuniya

  Department of Chemistry, Gakushuin University

• KIGOSHI Kuniihko

  Department of Chemistry, Gakushuin University

• NAGASAWA Hiroshi

  Department of Chemistry, Gakushuin University

Bibliographic Information

Other Title

• 武蔵野台地の地下水中の²³⁴U/²³⁸U比
• 武蔵野台地の地下水中の234U/238U比
• ムサシノ ダイチ ノ チカスイチュウ ノ 234U 238Uヒ

Abstract

Concentrations of ²³⁴U and ²³⁸U in the groundwater samples from Musashino-daichi, western Tokyo have been measured by alpha-spectrometry. Observed range of ²³⁴U and ²³⁸U concentrations were about 0.2-3.5 and 0.3-9.3 dpm/100l, respectively, with the ²³⁴U/²³⁸U activity ratios of 1.4-5.0 The presence of excess ²³⁴U, together with the observed linear correlation with ²³⁸U concentrations, indicates both excess ²³⁴U and²³⁸U have been supplied by source materials which are uniform with respect to the ability of supplying recoilgenic ²³⁴U and ²³⁸U into the groundwaters. High tritium concentrations in many of the samples (Tanaka, 1983) indicate the groundwater samples were composed of two distinct water components: one with fairly long age of contact with U containing minerals (orders of 1000 yrs or more) and one with fairly short tritium age (less than about 30 yrs).

Journal

• Chikyukagaku

  Chikyukagaku 17 (2), 103-108, 1983

  The Geochemical Society of Japan

Details

• CRID: 1390282680717773568
• NII Article ID: 110008679748
• NII Book ID: AN00141280
• DOI: 10.14934/chikyukagaku.17.103
• ISSN: 21885923
• ISSN: 03864073
• NDL BIB ID: 2969437
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I2969437
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
• Abstract License Flag: Disallowed