Hyperpolarized Xe atoms and atomic magnetometer for the detection of ultralow magnetic field
用于检测超低磁场的超极化Xe原子和原子磁力计
基本信息
- 批准号:17340122
- 负责人:
- 金额:$ 10.5万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (B)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2007
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The target of this research project is to develop the precise atomic magnetometer with the hybrid setup of spin-polarized Xe and Rb atoms. To utilize Xe atoms with intrinsically-long spin-relaxation time, it is necessary to preserve atoms at high density for a long time without loss of spin-polarization. I came up with the idea to solvate the hyperpolarized Xe atoms in some liquid where much higher density can be realized as gas phase at normal condition. The mechanism of spin-relaxation in solution, nuclear dipole interaction and spin-rotation interaction with solvent molecules, as well as wall relaxation was found. Wall relaxation is mostly dominant in spin-relaxation process since enormous numbers of past works cleared up the relaxation mechanism in gas-phase. We would get extremely high polarization of gaseous atoms if we overcame the wall relaxation. Our high field NMR measurement is one of hopes to lead us to understand the spin interaction at the walls. We are able to regenerate phase diagram of metal-impurities alloy by detecting Knight shift near the melting points of pure metal. Then, we assigned that two species of impurities can solve in alkali-metal in the glass cells. One is oxygen atoms. Once oxygen atoms solved into alkali-metal, the trace oxygen homogeneously takes electron from conduction band of metal. Since the electron density at surface is related to the nuclear spin relaxation of ^3He atoms, our finding gave as the technique to control precisely the oxygen density and to develop novel coating materials on the glass surface. In addition to wall relaxation mentioned above, we discovered the new phenomenon that the angular momentum can be transferred to a solid. By optically pumping gaseous Cs atoms, Cs nuclei of CsH salt was found to be polarized as 19-times as thermal equilibrium at 2.7T and 100℃.
该研究项目的目标是开发具有自旋极化 Xe 和 Rb 原子混合装置的精密原子磁力计。为了利用本质上具有较长自旋弛豫时间的 Xe 原子,需要将原子保持在高密度下。我提出了在某些液体中溶剂化超极化 Xe 原子的想法,在正常条件下,可以在气相中实现更高的密度。由于过去大量的工作阐明了气相中的弛豫机制,因此发现了溶液、核偶极相互作用和与溶剂分子的自旋旋转相互作用以及壁弛豫在自旋弛豫过程中占主导地位。如果我们克服了壁弛豫,我们就能获得极高的气态原子极化。我们的高场核磁共振测量是引导我们了解壁上自旋相互作用的希望之一。我们能够通过检测奈特来重新生成金属-杂质合金的相图。移动到附近然后,我们指定两种杂质可以溶解在玻璃电池中的碱金属中,一旦氧原子溶解到碱金属中,微量的氧就会从导带中均匀地夺取电子。由于表面的电子密度与 ^3He 原子的核自旋弛豫有关,因此我们的发现提供了除了上述壁弛豫之外精确控制氧密度并开发玻璃表面新型涂层材料的技术。 ,我们发现了角动量可以转移到固体的新现象通过光泵浦气态Cs原子,发现CsH盐的Cs核在2.7T和100℃下被极化为热平衡的19倍。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Highly time-resolved correlation measurement between laser and synchrotron radiation pulses without synchronization control
激光和同步加速器辐射脉冲之间的高度时间分辨相关性测量,无需同步控制
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Y. Takagi; M. Nakano; K. Arikawa; K. Ishikawa; S. Amano; S. Miyamoto; T. Mochizuki
- 通讯作者:T. Mochizuki
Spin-Exchange Optical Pumping of Solid Alkali Compounds
固体碱化合物的自旋交换光泵浦
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:B. Patton; K. Ishikawa; Y.
- 通讯作者:Y.
Progress in High-Field Optical Pumping of Alkali Metal Nuclei
碱金属核高场光泵浦研究进展
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:B. R. Patton; K. Ishikawa; Jau; W. Happer
- 通讯作者:W. Happer
Surface relaxation of polarized Xe atomsdissolved in deuterated ethanol
溶解在氘代乙醇中的极化 Xe 原子的表面弛豫
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:K.Ishikawa; T.Yamamoto; et. al.
- 通讯作者:et. al.
Ultrafast single-shot optical oscilloscope based on time-to-space conversion due to temporal and spatial walk-off effects in nonlinear mixing crystal
基于非线性混合晶体时空走离效应的时空转换的超快单次光学示波器
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Y. Takagi; Y. Yamada; K. Ishikawa; S. Shimizu; S. Sakabe
- 通讯作者:S. Sakabe
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ISHIKAWA Kiyoshi其他文献
ISHIKAWA Kiyoshi的其他文献
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