High precision measurements for unstable nuclei using an ion trap

利用离子阱在量子光学中实现了对基本量的高精度测量，取得了很大的进展。本研究旨在应用这种实验方法来研究不稳定核的一个非常精确的性质。一开始，我们讨论了两种可能性，即高精度质量的测量和超精细异常的测量。与教授讨论后。克鲁格和摩尔，我们决定先从超精细异常开始。由于美因茨大学的werth教授和他的团队是这一领域的专家，我们决定通过这个交流项目来促进与他的团队的合作。由于在美因茨的离子阱系统是离线型的，只能操纵稳定和长寿命的放射性同位素，因此这种合作被发现是非常富有成效和互补的。另一方面，在东京国际原子能机构，所瞄准的陷阱系统是联机型的，特别适合于短寿命不稳定核的研究。今年，该基金已用于三个方向的研究活动，即(1)与美因茨集团合作推动激光-微波双共振实验，(2)发展离子阱外制备离子的注入技术，以及(3)收集和/或交流相关领域的物理信息。关于(1)，werth教授和美因茨大学的一名博士后访问日本，在日本电子通信大学激光中心合作进行^<43>Ca^+双共振实验，因为激光系统是在那里组装和调谐的，并进行了双共振基准实验的测试。另一方面，美国国际新闻社的Wada访问美因茨，商讨合作事宜。1994年秋，电子通信大学的一名博士生应邀参加美因茨的一项实验。与此相关(2)，Wada访问了Gissen大学，为INS离子阱系统设计回旋加速器束流传输系统。随后，吉森大学的Wollnik教授访问了国际新闻社。国际原子能机构的一位工程师田中先生拜访了Jyvaskyla大学的valli教授，交换了离子引导技术的信息，特别是国际原子能机构最近在多射频场设备SPIG上的工作。关于(3)，片山访问了美国的几个研究所，检查和交流了离子阱实验的最新结果。在NIST， Dr.Wineland和他的团队已经对INS实验表现出了兴趣，希望能在未来进行合作。田边和宫内分别访问了欧洲，交换了离子-原子相互作用和探测器系统的信息。Kubono， Fukuda和Nagai访问了GSI和Jyvaskyla，交换了不稳定核的核结构信息。少

There has been a great progress in high precision measurement of fundamental quantities which was achieved by utilizing an ion trap in quantum optics. The present study aims at applying this experimental method in order to investigate a very precise property of unstable nuclei. In the beginning, we had discussed about two possibilities i.e., measurements of high precision mass as well as hyperfine anomaly. After discussion with Profs.Kluge and Moore, we have decided to start for hyperfine anomaly at first. Since Prof.Werth of Mainz Univ. and his group have been expert in this field, we came to a conclusion to promote a collaboration work with his group by this exchange project. This collaboration has been found to be very fruitful and complementary for each other since at Mainz the ion trap system is off-line type which can only manipulate stable and long life radio-isotopes. On the other hand, at INS, Tokyo, the trap system which has been aimed at is on-line type, especially suited fo … More r the research on short-life unstable nuclei.This year, the exchange fund has been used in research activities in three directions, viz, (1) collaboration with Mainz group to promote a laser-micro wave double resonance experiment, (2) development of injection technique of ions prepared outside of an ion trap, and (3) collection and/or exchange of physics information in relating fields. Regarding to (1), Prof.Werth and a post-doc of Mainz Univ. visited Japan to collaborate to a ^<43>Ca^+ double-resonance experiment at Laser Center of Electro Communication Univ., since the laser system has been assembled and tuned at that place and tested by a bench mark experiment of the double resonance. On the other hand, Wada of INS visited Mainz to discuss about the collaboration. In 1994 autumn, a doctor course student of Electro Comm. Univ. is invited to participate in an experiment at Mainz. Relating (2), Wada visited Univ. Gissen to work for a design of the cyclotron beam transport system for the ion trap system at INS. This collaboration was then proceeded by a visit of Prof. Wollnik of Gissen Univ. to INS. An INS engineer Mr.J.Tanaka visited Prof.Valli at Jyvaskyla Univ. to exchange the information of the ion-guide technique, especially of the recent INS work on a multiple rf field equipment SPIG. Relating to (3), Katayama visited several Institutes in USA to examine and exchange the recent results of ion trap experiments. At NIST, Dr.Wineland and his group has shown their interest on INS experiment, which will hopefully proceed to a future collaboration. Tanabe and Miyachi visited Europe to exchange the information of ion-atom interaction and a detector system, respectively. Kubono, Fukuda and Nagai visited GSI and Jyvaskyla to exchange the information of nuclear structure of unstable nuclei. Less