加速器质谱研究超重核进展

Study of Super-heavy Nuclei with AMS

摘要: 超重核的研究具有重要的科学与实际意义。目前，在自然界直接寻找超重核的方法主要包括普通质谱（ICP-SF-MS），加速器质谱（AMS）及多重中子探测的方法等。相比其他方法，AMS具有灵敏度高、样品用量少、测量时间短等优势。本文综述了近年来国内外利用AMS寻找超重核的方法及现状。迄今为止，利用AMS寻找了40余种超重核素，但没有明显的证据表明超重核的存在，这些核素与其矿物主体元素的丰度比约在10^-12到10^-16之间。

Abstract: There are significantly scientific and practical significance for the study of super-heavy nuclei. Currently, the methods for the study of searching for super-heavy nuclei in nature mainly include ordinary mass spectrometry methods such as ICP-SFMS, accelerator mass spectrometry (AMS) and the method of multiple neutron detection. Compared to the other methods, AMS have some advantages, such as high sensitivity, small sample size and short measuring time. The methods and the status of searching for super-heavy nuclei with AMS at home and abroad in recent years were reviewed. Until now, more than 40 species of super-heavy nuclides have been searched with AMS. There was no clear evidence of the existence of super-heavy nuclei. The abundances of these nuclides with respect to host elements of mineral were about 10^-12 to 10^-16.