The processes of material transport in oceans and their exchange with the land mass are complex and are a concern of interest to many researchers. Seawater and surface sediment samples from Tarapur, Mumbai and Goa from west coast of India were collected and analysed for 226Ra and 228Ra. The activity levels of 226Ra ranged from 19 to 36 Bq/kg while the levels of 228Ra ranged from 25 to 55 Bq/kg in sediments. While the 226Ra and 228Ra activity levels ranged between 1.2–3.7 mBq/L and 3.1–7.1 mBq/L respectively. The activity ratios for the two isotopes were also calculated and were found to range between 0.4 and 2.3. The analyses were carried out using gamma spectrometry.

中文翻译：

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印度西海岸海洋沉积物和海水中天然镭的活度和同位素比

海洋中的物质运输及其与陆地的交换过程很复杂，是许多研究人员感兴趣的问题。收集了来自印度西海岸的塔拉普尔、孟买和果阿的海水和表层沉积物样品，并分析了 226Ra 和 228Ra。沉积物中 226Ra 的活性水平范围为 19 至 36 Bq/kg，而 228Ra 的水平范围为 25 至 55 Bq/kg。而 226Ra 和 228Ra 的活性水平分别介于 1.2–3.7 mBq/L 和 3.1–7.1 mBq/L 之间。还计算了两种同位素的活度比，发现其范围在 0.4 和 2.3 之间。使用伽马光谱法进行分析。