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2007 Fiscal Year Final Research Report Summary

Hyperpolarized Xe atoms and atomic magnetometer for the detection of ultralow magnetic field

Research Project

Project/Area Number 17340122
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 原子・分子・量子エレクトロニクス・プラズマ
Research InstitutionUniversity of Hyogo

Principal Investigator

ISHIKAWA Kiyoshi  University of Hyogo, Graduate School of Material Science, Associate Professor (00212837)

Project Period (FY) 2005 – 2007
KeywordsSpin polarization / Spin current / NMR / Optical pumping / Quantum electronics
Research Abstract

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℃.

  • Research Products

    (16 results)

All 2008 2007 2006 2005

All Journal Article (8 results) (of which Peer Reviewed: 3 results) Presentation (8 results)

  • [Journal Article] Intrinsic Impurities in Glass Alkali-Vapor Cells2007

    • Author(s)
      B.Patton, K.Ishikawa, et. al.
    • Journal Title

      Physical Review Letters 99

      Pages: 4

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Spin Transfer from an OpticallyPumped Alkali Vapor to a Solid2007

    • Author(s)
      K.Ishikawa, B.Patton, et. al.
    • Journal Title

      Physical Review Letters 98

      Pages: 4

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Intrinsic Impurities in Glass Alkali-Vapor Cells2007

    • Author(s)
      B. Patton, K. Ishikawa, Y.-Y. Jau, W. Happer
    • Journal Title

      Phys. Rev. Lett 99, 027601

      Pages: 4

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Spin Transfer from an Optically Pumped Alkali Vapor to a Solid2007

    • Author(s)
      K. Ishikawa, B. Patton, Y.-Y. Jau, W. Happer
    • Journal Title

      Phys, Rev. Lett 98, 183004

      Pages: 4

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Surface relaxation of polarized Xe atomsdissolved in deuterated ethanol2006

    • Author(s)
      K.Ishikawa, T.Yamamoto, et. al.
    • Journal Title

      Journal of Magnetic Resonance 179

      Pages: 234-240

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Surface relaxation of polarized Xe atoms dissolved in deuterated ethanol2006

    • Author(s)
      K. Ishikawa, T. Yamamoto, Y. Takagi
    • Journal Title

      J. Magn. Reson 179

      Pages: 234-240

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Highly time-resolved correlation measurement between laser and synchrotron radiation pulses without synchronization control2005

    • Author(s)
      Y. Takagi, M. Nakano, K. Arikawa, K. Ishikawa, S. Amano, S. Miyamoto, T. Mochizuki
    • Journal Title

      J. Synchrotron Rad 12

      Pages: 826-832

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ultrafast single-shot optical oscilloscope based on time-to-space conversion due to temporal and spatial walk-off effects in nonlinear mixing crystal2005

    • Author(s)
      Y. Takagi, Y. Yamada, K. Ishikawa, S. Shimizu, S. Sakabe
    • Journal Title

      Jpn. J. Appl. Phys 44

      Pages: 6546-6549

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Spin-Exchange Optical Pumping of Alkali Salts2008

    • Author(s)
      B. Olsen, B. Patton, K. Ishikawa, Y.Y. Jau, W. Happer
    • Organizer
      APS DAMOP meeting
    • Place of Presentation
      Pennsylvania
    • Year and Date
      2008-05-31
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] 偏極気体原子によるアルカリ塩の核スピン偏極III2008

    • Author(s)
      石川 潔
    • Organizer
      日本物理学会2008年春季大会
    • Place of Presentation
      近畿大学、大阪
    • Year and Date
      2008-03-23
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Spin Exchange Optical Pumping of Alkali Salts2008

    • Author(s)
      B. A. Olsen, B. R. Patton, K. Ishikawa, Jau, W. Happer
    • Organizer
      49th ENC
    • Place of Presentation
      Asilomar CA
    • Year and Date
      2008-03-11
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Spin-Exchange Optical Pumping of Solid Alkali Compounds2007

    • Author(s)
      B. Patton, K. Ishikawa, Y.-Y. Jall, W. Happer
    • Organizer
      APS DAMOP meeting
    • Place of Presentation
      Calgary, Canada
    • Year and Date
      2007-06-06
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Progress in High-Field Optical Pumping of Alkali Metal Nuclei2006

    • Author(s)
      B. R. Patton, K. Ishikawa, Jau, W. Happer
    • Organizer
      APS DAMOP meeting, T6.02
    • Place of Presentation
      Knoxville, TN
    • Year and Date
      2006-05-19
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] NMR Studies of Phase Transitions in Alkali Metal Films on Glass Substrates2006

    • Author(s)
      K. Ishikawa, B. R. Patton, Y.-Y. Jau, W. Happer
    • Organizer
      APS DAMOP meeting
    • Place of Presentation
      Knoxville, TN
    • Year and Date
      2006-05-19
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] NMR Studies of Phase Transitions in Alkali Metal Films2006

    • Author(s)
      B. R. Patton, K. Ishikawa, Y.-Y. Jau, W. Happer
    • Organizer
      47th ENC
    • Place of Presentation
      Asilomar, CA
    • Year and Date
      2006-04-26
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Spin relaxation of polarized Xe atoms at the liquid-solid interface2005

    • Author(s)
      T. Yamamoto, K. Ishikawa, Y. Takagi
    • Organizer
      International Conference of Magnetic Resonance Microscopy
    • Place of Presentation
      Utsunomiya, Japan
    • Year and Date
      2005-08-25
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-02-04  

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