International Conference on Exotic Nuclei and Atomic Masses ENAM98
International Conference on Exotic Nuclei and Atomic Masses ENAM98
复制标题
奇异原子核和原子质量国际会议 ENAM98
DOI：
10.1080/10506899909411103
复制
发表时间：
1999
影响因子：
--
通讯作者：
D. Guillemaud
中科院分区：
文献类型：
--
作者：
D. Guillemaud
由阿贡国家实验室的卡里·戴维斯和密歇根州立大学-南卡罗来纳州立大学的布拉德·谢里尔组织的关于奇异核和原子质量的国际会议，ENAM 98，于1998年6月23日至27日在北密歇根州的一个非常好的地方Bellaire举行。这次会议遵循了在法国阿尔勒举行的ENAM 95会议以及“远离稳定的核”和“原子质量和基本常数”会议的前身系列会议所确立的传统。它吸引了来自美洲、亚洲和欧洲23个国家的257名与会者。作为第一个一般性评论，提出了大量的新成果，无论是在理论和实验，因为以前的ENAM 95。许多新的放射性束流设施正在规划或建造中，这将开辟奇妙的前景。为了解决一个物理问题或克服一个微妙的实验问题而开发的高能或中能重离子加速器和ISOL型设施的方法的互补性已被证明是理解远离稳定性的原子核结构的巨大财富。ENAM 98的亮点之一是通过两种专用方法以非常高的精度获得了大量新的实验质量值：ISOL-TRAP在同位素长链上的精确度为0.1 ppm，ESR储存环用于分离，储存和冷却来自重离子反应的碎片，从而以6 mlm的精度确定质量=以第二种同位素方式操作ESR允许测量非常短寿命的核的质量，如在外来Ni同位素的情况下，并执行半-贮存和冷却核的寿命测定。还研究了原子电荷状态对β衰变半衰期的影响。使用单路径飞行时间技术的直接质量测量甚至更不精确，已经对Si在N= 28附近的壳闭合行为提出了一些看法，
The International Conference on Exotic Nuclei and Atomic Masses, ENAM98, organized by Cary Davids from Argonne National Laboratory and Brad Sherrill from MSU-NSCL, took place from June 23 to June 27, 1998 in Bellaire, a very nice place in North Michigan. This meeting followed the traditions established by ENAM95 in Arles, France and the precursor series of conferences,“Nuclei Far From Stability” and “Atomic Masses and Fundamental Constants.” It attracted 257 participants from 23 countries from America, Asia, and Europe. As a first general comment, a tremendous wealth of new results was presented, both in theory and experiment, since the previous ENAM95. Many new radioactive beam facilities are either projected or constructed which will open fantastic perspectives. The complementarity in methods, highenergy or intermediate-energy heavyion accelerators and ISOL-type facilities developed in order to attack a physics question or to overcome a delicate experimental problem has proven to be a great richness for understanding of the structure of nuclei far from stability.One of the highlights of ENAM98 is the wealth of new experimental mass values obtained with a very high precision by means of two dedicated methods: the ISOL-TRAP leading to a precision of 0.1 ppm on long chains of isotopes and the ESR storage ring used to separate, store and cool the fragments from heavy-ion reactions leading to a determination of masses with a precision of 6mlm= Operating the ESR in a second isochronous way allows to measure also masses of very short-lived nuclei like in the case of exotic Ni isotopes and to perform half-life determinations for stored and cooled nuclei. The influence of atomic charge states on the beta decay half-lives has also been studied. Direct mass measurements using single-path time of flight techniques even less precise have put some light on the behaviour of shell closure in the vicinity of N= 28 for Si to