| AMS检测铅中超重核~(298)Fl |
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| 引用本文： | 王小明,赵庆章,张慧,何明,董克君,武绍勇,窦亮,杨旭冉,徐永宁,庞义俊,杨宪林,姜山.AMS检测铅中超重核~(298)Fl[J].原子能科学技术,2017,51(6):1096-1102. |
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| 作者姓名： | 王小明 赵庆章 张慧 何明 董克君 武绍勇 窦亮 杨旭冉 徐永宁 庞义俊 杨宪林 姜山 |
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| 作者单位： | 1.中国原子能科学研究院 核物理研究所，北京102413；2.黑龙江省科学院 技术物理研究所，黑龙江 哈尔滨150086；3.广西师范大学，广西 桂林541004 |
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| 基金项目： | 国家自然科学基金资助项目(11175263) |
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| 摘 要： | 理论物理学家根据壳模型预言自然界存在超重稳定岛,然而迄今为止没有找到。本文利用加速器质谱(AMS)开展高灵敏的超重核~(298)Fl的测量方法研究,其中主要包括测量样品的选择、离子源引出形式的确定、超重核的传输与测量和测量系统稳定性的监测。超重核~(298)Fl的每种样品测量计数均为0。理论计算结果表明,在所测的铅样品中,超重核~(298)Fl与Pb的原子个数比值上限约为10-12~10-14。
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| 关 键 词： | 超重核 加速器质谱 高灵敏 |
Detection of Super-heavy Nuclei 298Fl in Lead by AMS |
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| WANG Xiao-ming,ZHAO Qing-zhang,ZHANG Hui,HE Ming,DONG Ke-jun,WU Shao-yong,DOU Liang,YANG Xu-ran,XU Yong-ning,PANG Yi-jun,YANG Xian-lin,JIANG Shan.Detection of Super-heavy Nuclei 298Fl in Lead by AMS[J].Atomic Energy Science and Technology,2017,51(6):1096-1102. |
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| Authors: | WANG Xiao-ming ZHAO Qing-zhang ZHANG Hui HE Ming DONG Ke-jun WU Shao-yong DOU Liang YANG Xu-ran XU Yong-ning PANG Yi-jun YANG Xian-lin JIANG Shan |
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| Affiliation: | 1.China Institute of Atomic Energy, P. O. Box 275-50, Beijing 102413, China;2.Technical Physics Institute of Heilongjiang Academy of Sciences, Harbin 150086, China;3.Guangxi Normal University, Guilin 541004, China |
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| Abstract: | Theoretical physicists predict that there is an island of stability in nature according to the nuclear shell model,but so far there is no evidence for the existence of super-heavy nuclei.In the paper,a highly sensitive measurement method for superheavy nuclei 298Fl with accelerator mass spectrometry (AMS) was developed,which mainly included the selection of experimental samples,the determination of ionic extraction form,the transmission and measurement of super-heavy nuclei and the monitoring of the system stability.The count is zero for each measurement of super-heavy nuclei 298 Fl.The theoretical calculation result indicates that the upper limit of the number ratio of super-heavy nuclei 298Fl and Pb in lead samples is on the order of 10-12-10-14. |
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| Keywords: | super heavy nuclei accelerator mass spectrometry high sensitivity |
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