CAJ | 학술논문

根据良渚古城墙上进行的地面γ能谱测量的天然放射性元素U、Th、K含量及总道计数率值,分析了东城墙、北城墙、和西城墙的放射性元素含量分布特征,得到放射性元素U、Th、K含量的相对高值的位置、宽度、走向与城墙的位置、宽度、走向基本一致.不同城墙上放射性元素含量相对高值强弱不均匀.城墙保存越好,放射性元素含量高值对城墙的反映越明显,边界越清晰(如东城墙);城墙破坏越严重,放射性元素含量相对高值对城墙的反映越模糊,边界不清(如西城墙).因此通过地面γ能谱测量对古城墙识别是可行的,可通过适当的数据处理,突出这一弱异常,从而达到对良渚古城墙的位置、宽度和走向的探测.
근거량저고성장상진행적지면γ능보측량적천연방사성원소U、Th、K함량급총도계수솔치,분석료동성장、북성장、화서성장적방사성원소함량분포특정,득도방사성원소U、Th、K함량적상대고치적위치、관도、주향여성장적위치、관도、주향기본일치.불동성장상방사성원소함량상대고치강약불균균.성장보존월호,방사성원소함량고치대성장적반영월명현,변계월청석(여동성장);성장파배월엄중,방사성원소함량상대고치대성장적반영월모호,변계불청(여서성장).인차통과지면γ능보측량대고성장식별시가행적,가통과괄당적수거처리,돌출저일약이상,종이체도대량저고성장적위치、관도화주향적탐측.
Gamma spectra of 238U,232Th and 40K were measured at the Liangzhu archaic rampart in selected grid of spots on the east,north and west city wall and nearby areas,in an attempt to determine layout of the city walls by analyzing features of the radionuclide content distribution and the total counts of 0.5-3 MeV γ-rays. It was found that the location,width and content variations tendency of the 238U,232Th and 40K contents were basically in accordance with archaeological findings of the rampart. The abnormal content distributions on different walls were inhomogeneous. In a better protected part of the archaic rampart,the radioactivity anomaly was more obvious,hence a clearer indication of the wall layout,such as the east wall),whereas it is not the case for the west wall,which is badly protected. By suitable data processing to enhance the weak anomaly,however,the method of γ-ray spectroscopy can be used for archaic rampart detection.