Measurements of electromagnetic moments of 19N and 20N and spectroscopic studies of levels in daughter nucleus

19N和20N电磁矩的测量以及子核能级的光谱研究

• 批准号: 11640277
• 负责人: SHIMIZU Suguru
• 金额: $ 2.56万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640277/
• 关键词: unstable nucleus; neutron halo nucleus; magnetic moment; spin polarization; transfer of spin-polarized electron; laser optical pumping; Ti : Sapphire laser; beam-foil spectroscopy; β遅発中性子崩壊; 励起準位; 傾斜薄膜法; チタンサファイアレーザー

A versatile spin polarizer for radioactive nuclear beams is proposed for spectroscopic studies of exotic nuclei far from stability. The polarizer takes advantage of the polarized electron transfer process, as in the optically pumped polarized proton ion sources. This method is applicable for low energy beams with a wide variety of nuclear species. The feasibility of the polarizer has been experimentally investigated by using stable nuclear beams at the test stand of RCNP.The beams with 2+ charge were injected into the polarizer and the nuclear polarization of the 1+ charge ions was selectively measured. The polarization measurement was based on the method of beam-foil spectroscopy. The nuclear polarization was observed for 10 keV/amu 3He, 3.4 keV/amu 14N and 15N beams to be (3.89 +- 0.76) %, (3.04 +- 0.11) % and (1.32 +- 0.40) %, respectively with P (Rb) =70-80%. The transmission efficiency of the 14N beam, (2+ion → 1+ion) was found to be 〜 60%. The performance is very promising for practical applications.

提出了一种用于放射性核束的多功能自旋偏振器，用于远离稳定的外来核的光谱研究。该偏振器利用了偏振电子转移过程，如在光泵浦偏振质子离子源中一样，该方法适用于具有低能量的束。在RCNP的试验台上利用稳定的核束对多种核素进行了实验研究。将带有2+电荷的光束注入偏振器并进行核偏振。选择性地测量1+电荷离子的偏振测量是基于束箔光谱法，观察到10ke​​V/amu 3He、3.4keV/amu 14N和15N束的核偏振为(3.89+/-)。 0.76)%、(3.04±0.11)%和(1.32±0.40) %，分别为 P (Rb) =70-80%，14N 光束（2+离子 → 1+离子）的传输效率约为 60%，其性能在实际应用中非常有前景。

项目成果

T.Shimoda, 他: "A Spin Polarizer for Low Energy Radioactive Nuclear Beams"Proc.of 14^ Int.Spin Physics Symposium, (SPIN2000), IOP Conference Proceedings. (出版予定). (2001)

T.Shimoda 等人：“低能放射性核束的自旋偏振器”第 14 届国际自旋物理研讨会论文集，(SPIN2000)，IOP 会议论文集（待出版）。

S.Shimizu, E.Doumoto, S.Tanimoto, N.Nakamura, Y.Hirayama, K.Horie, T.Shigematsu, H.Izumi, T.Shimoda, and N.Takahashi: "High Precision Polarimeter System for Atomic Polarization and Tilted-Foil Experiments with 1.7 KeV/amu ^N^+ Beam."Review of Scientif

S.Shimizu、E.Doumoto、S.Tanimoto、N.Nakamura、Y.Hirayama、K.Horie、T.Shigematsu、H.Izumi、T.Shimoda 和 N.Takahashi：“用于原子偏振和偏振的高精度旋光仪系统”

T.Shimoda, S.Shimizu, E.Doumoto, M.Yagi, M.Asai, M.Nakamura, Y.Hirayama, K.Horie, T.Shigematsu, H.Izumi, and N.Takahashi: "A spin polarizer for radioactive nuclear beams by taking advantage of polarizaed electron transfer reactions."Proc.of 5^ Int.Con

T.Shimoda、S.Shimizu、E.Doumoto、M.Yagi、M.Asai、M.Nakamura、Y.Hirayama、K.Horie、T.Shigematsu、H.Izumi 和 N.Takahashi：“用于

T.Shimoda, 他: "A spin polarizer for radioactive nuclear beams by taking advantage of polarizaed electron transfer reactions"Proc.of 5^ Int.Conf.on Radioactive Nuclear Beams, (RNB2000), Nuclear Physics A.. (出版予定). (2001)

T. Shimoda 等人：“利用极化电子转移反应的放射性核束的自旋偏振器”Proc.of 5^<th>Int.Conf.on Radioactive Nuclear Beams，(RNB2000)，Nuclear Chemistry A。 .（（待出版）。（2001）

S.Shimizu, E.Doumoto, M.Yagi, M.Asai, M.Nakamura, Y.Hirayama, K.Horie, T.Shigematsu, H.Izumi, T.Shimoda and N.Takahashi: "Spin polarization of low energy radioactive nuclear beams by tilted-foil technique."Proc.of 5^ Int.Conf.on Radioactive Nuclear Be

S.Shimizu、E.Doumoto、M.Yagi、M.Asai、M.Nakamura、Y.Hirayama、K.Horie、T.Shigematsu、H.Izumi、T.Shimoda 和 N.Takahashi：“低能自旋极化