CAJ | 학술논문

运用1：20万地球化学数据和现场伽马能谱数据，评价了珠海市区的放射性水平情况。从区域地球化学数据中得到珠海市区内天然放射性核素238 U、232 Th、40 K的比活度为29．64～229．71 Bq/kg，64．55～397．88 Bq/kg和127．81～1361．55 Bq/kg。研究表明该地区内的天然放射性核素含量普遍较高，其中花岗岩地区的放射性核素含量较高，第四系沉积物放射性水平较低，可能受到南屏-唐家断裂带和南屏断裂带的影响，地区中部的238 U、232 Th、40 K含量比其他区域都要高。因此，利用地球化学数据取得土壤放射性核素的含量，推算放射性核素的比活度，圈定测区的异常区域，分析研究该区域内的核辐射环境水平，是一种有效可行的评价方法。
운용1：20만지구화학수거화현장가마능보수거，평개료주해시구적방사성수평정황。종구역지구화학수거중득도주해시구내천연방사성핵소238 U、232 Th、40 K적비활도위29．64～229．71 Bq/kg，64．55～397．88 Bq/kg화127．81～1361．55 Bq/kg。연구표명해지구내적천연방사성핵소함량보편교고，기중화강암지구적방사성핵소함량교고，제사계침적물방사성수평교저，가능수도남병-당가단렬대화남병단렬대적영향，지구중부적238 U、232 Th、40 K함량비기타구역도요고。인차，이용지구화학수거취득토양방사성핵소적함량，추산방사성핵소적비활도，권정측구적이상구역，분석연구해구역내적핵복사배경수평，시일충유효가행적평개방법。
Based on 1:200000 geochemical data and gamma spectroscopy ,the article made an evaluation of radi-oactivity in Zhuhai .From the regional geochemical data ,the specific activities of 238 U、232 Th and 40 K in the city are 29.64~229.71 Bq/kg,64.55~397.88 Bq/kg and 127.81~1 361.55 Bq/kg respectively.The study show that the natural radionuclide content is relatively high in the place ,and the radionuclides of granite areas are more higher than Quaternary sediments .On the other hand ,238 U、232 Th and 40 K levels in regional central are higher than other regions because of Nanping -Tang fault and Nanping fault .Therefore ,using soil geochemical data to obtain the specific activities of radionuclides and delineate the abnormal area ,and then surveying the re-gion’s level of nuclear radiation environment based on gamma spectrometry is a feasible and effective methods .