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arXiv 1611.06151nucl-exphysics.atom-phphysics.ins-det
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在TRIUMF上用TITAN研究高电荷态放射性离子的电弱衰变

Electroweak Decay Studies of Highly Charged Radioactive Ions with TITAN at TRIUMF

K. G. Leach, I. Dillmann, R. Klawitter, E. Leistenschneider, A. Lennarz, T. Brunner, D. Frekers, C. Andreiou, A. A. Kwiatkowski, J. Dilling

摘要:

几种电弱放射性衰变模式需要原子核和组成原子内的束缚电子之间的相互作用。因此,各个衰变的概率不仅受到原子核中初态和末态结构的影响,而且还强烈依赖于原子的电荷。适合这些稀有同位素部分或完全电离的条件自然发生在炎热、稠密的天体物理环境中,但也可以在实验室中人工产生,以选择性地阻止某些放射性衰变模式。由于在高电荷状态下产生和储存放射性离子所需的实验室条件,对这种情况进行直接实验研究是极其困难的。一个新的电子束离子阱(EBIT)衰变设置与TITAN实验在TRIUMF已成功地证明了这种技术的高电荷离子的放射性衰变进行光谱学。

英文摘要:

Several modes of electroweak radioactive decay require an interaction between the nucleus and bound electrons within the constituent atom. Thus, the probabilities of the respective decays are not only influenced by the structure of the initial and final states in the nucleus, but can also depend strongly on the atomic charge. Conditions suitable for the partial or complete ionization of these rare isotopes occur naturally in hot, dense astrophysical environments, but can also be artificially generated in the laboratory to selectively block certain radioactive decay modes. Direct experimental studies on such scenarios are extremely difficult due to the laboratory conditions required to generate and store radioactive ions at high charge states. A new electron-beam ion trap (EBIT) decay setup with the TITAN experiment at TRIUMF has successfully demonstrated such techniques for performing spectroscopy on the radioactive decay of highly charged ions.

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