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首页> 外文期刊>Radiation Protection and Environment >Concentration and activity ratio of thorium isotopes in surface soil around proposed uranium mining site in India
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Concentration and activity ratio of thorium isotopes in surface soil around proposed uranium mining site in India

机译：印度拟建铀矿开采场周围表层土壤中or同位素的浓度和活度比

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摘要

Unconformity type of uranium deposits at Lambapur and Peddagattu located in Nalgonda District of Andhra Pradesh, India has been reported. Soil surveillance for isotopic thorium belonging to two different radioactive decay chains provide information on characterization of soil formation due to weathering of underlying host rocks. Thorium concentration and their isotopic activity ratio in localized soil samples were assessed. Thorium concentration and ~(230)Th/~(232)Th activity ratio were observed to be in the range of 15 + 3 mg/kg to 132 ± 15 mg/kg and 0.21 ± 0.07-0.68 ± 0.05, respectively. A significant wide variation in thorium concentration and that of activity ratio for localized area soil indicates the soil development due to a different type of underlying host rocks. Activity ratio of ~(228)Th/~(232)Th in the soil samples of the study area are observed to vary from 0.87 ± 0.05 to 1.07 + 0.15 with a mean of 0.96 ± 0.02, indicating secular equilibrium between ~(232)Th and its daughter product ~(228)Th. The study describes the application of isotopic thorium activity as a chronological indicator for geological characterization.
机译：据报导，位于印度安得拉邦纳尔贡达区的兰巴普尔和佩达达格图的铀矿床不整合类型。属于两个不同放射性衰变链的同位素th的土壤监测提供了有关下层宿主岩石风化引起的土壤形成特征的信息。评估了局部土壤样品中的concentration浓度及其同位素活性比。 ium浓度和〜（230）Th /〜（232）Th活性比分别在15 + 3 mg / kg到132±15 mg / kg和0.21±0.07-0.68±0.05的范围内。 local浓度和活度比在局部区域的土壤中变化很大，这表明土壤发育是由于下层基质岩的类型不同所致。研究区土壤样品中〜（228）Th /〜（232）Th的活度比在0.87±0.05到1.07 + 0.15之间变化，平均值为0.96±0.02，表明〜（232）之间的长期平衡Th及其子乘积〜（228）Th。该研究描述了同位素or活性作为地质表征的时间顺序指标的应用。

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  • 来源
    《Radiation Protection and Environment》 |2013年第3期|109-114|共6页
  • 作者

    S. K. Srivastava; K. Vishwa Prasad; A. Y. Balbudhe; P. Padma Savithri; P. M. Ravi; R. M. Tripathi;

  • 作者单位

    Departments of Atomic Energy, Health Physics Unit, NFC, Health Physics Division, Bhabha Atomic Research Centre, Hyderabad, Andhra Pradesh, Trombay, Mumbai, Maharashtra, India,Health Physics Unit, NFC, Health Physics Division, BARC, PO ECIL, Hyderabad - 500 062, Andhra Pradesh, India;

    Departments of Atomic Energy, Health Physics Unit, NFC, Health Physics Division, Bhabha Atomic Research Centre, Hyderabad, Andhra Pradesh, Trombay, Mumbai, Maharashtra, India;

    Departments of Atomic Energy, Health Physics Unit, NFC, Health Physics Division, Bhabha Atomic Research Centre, Hyderabad, Andhra Pradesh, Trombay, Mumbai, Maharashtra, India;

    Departments of Atomic Energy, Health Physics Unit, NFC, Health Physics Division, Bhabha Atomic Research Centre, Hyderabad, Andhra Pradesh, Trombay, Mumbai, Maharashtra, India;

    Departments of Atomic Energy, Health Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, Maharashtra, India;

    Departments of Atomic Energy, Health Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, Maharashtra, India;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Alpha spectroscopy; radioactive equilibrium; soil; thorium;

    机译：阿尔法光谱;放射性平衡泥;钍;

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