| 摘要: |
| 2016年在北部湾白龙半岛邻近海域采集了表层沉积物，用高纯锗γ能谱仪测量了沉积物中放射性核素的活度.沉积物中40K、210Pb、226Ra、228Th、228Ra、238U和137Cs比活度分别为354±125、89.2±41.2、32.40±9.38、49.2±14.7、42.8±12.6、48.3±20.2和0.74±0.33 Bq/kg.白龙半岛邻近海域沉积物238U、232Th、226Ra含量水平与我国其他近岸海域的含量水平接近，40K、137Cs含量低于我国其他近岸海域的含量.由沉积物放射性核素活度计算的平均γ辐射吸收剂量（D）和平均年有效剂量当量（AEDE）都与世界平均水平相当，镭当量比活度（Raeq）远低于UN-SCEAR建议的最低限值. |
| 关键词: 海洋化学 沉积物；放射性核素；含量；辐射水平；白龙半岛 |
| DOI：10.3969/J.ISSN.2095-4972.2018.02.006 |
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| 基金项目:海洋公益性行业科研专项经费资助项目（201505005-1）；广西壮族自治区科技计划资助项目（2017AB30024）；福建省自然科学基金资助项目（2017J05065）；国家重点研发计划资助项目（2017YFC1405003） |
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| Radionuclides in the surface sediments along the coast of Bailong Peninsula in Beibu Gulf |
| MAO Yuan-yi,LIN Jing,HUANG De-kun,YU Tao |
| (SPIC Guangxi Nuclear Power Limited Company，Nanning， 530028， China;Third Institute of Oceanography， SOA， Xiamen 361005， China) |
| Abstract: |
| The surface sediment along the coast of Bailong Peninsula was investigated in 2016， and the radionuclide activities were measured using HPGeγ ray detector. The activities of40K、210Pb、226Ra、228Th、228Ra、238U and 137Cs were 354±125， 89.2±41.2， 32.40±9.38， 49.2±14.7， 42.8±12.6， 48.3±20.2 and 0.74±0.33 Bq/kg， respectively. The activities of 238U，232Th and 226Ra were comparable with the sediments activities of other coast in China， while 40K and 137Cs activities were slightly lower. The average absorbed gamma dose rate （D） and annual effective dose equivalent （AEDE） calculated according to the activities were comparable with the world average， and average radium equivalent activity （Raeq） was lower than the recommended limit value. |
| Key words: marine chemistry sediment radionuclides activity radiation dose Bailong Peninsula |
