Low-frequency nuclear quadrupole resonance with a dc SQUID

Chang, Jih -Wen

doi:10.2172/10147735

Title: Low-frequency nuclear quadrupole resonance with a dc SQUID

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Abstract

Conventional pure nuclear quadrupole resonance (NQR) is a technique well suited for the study of very large quadrupolar interactions. Numerous nuclear magnetic resonance (NMR) techniques have been developed for the study of smaller quadrupolar interactions. However, there are many nuclei which have quadrupolar interactions of intermediate strength. Quadrupolar interactions in this region have traditionally been difficult or unfeasible to detect. This work describes the development and application of a SQUID NQR technique which is capable of measuring intermediate strength quadrupolar interactions, in the range of a few hundred kilohertz to several megahertz. In this technique, a dc SQUID (Superconducting QUantum Interference Device) is used to monitor the longitudinal sample magnetization, as opposed to the transverse magnetization, as a rf field is swept in frequency. This allows the detection of low-frequency nuclear quadrupole resonances over a very wide frequency range with high sensitivity. The theory of this NQR technique is discussed and a description of the dc SQUID system is given. In the following chapters, the spectrometer is discussed along with its application to the study of samples containing half-odd-integer spin quadrupolar nuclei, in particular boron-11 and aluminum-27. The feasibility of applying this NQR technique in the study of samples containingmore »« less

Authors:

Chang, Jih -Wen ^[1]

Univ. of California, Berkeley, CA (United States)

Publication Date:: Mon Jul 01 00:00:00 EDT 1991

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 10147735

Report Number(s):: LBL-31124
ON: DE92014506

DOE Contract Number:: AC03-76SF00098

Resource Type:: Thesis/Dissertation

Resource Relation:: Other Information: TH: Thesis (Ph.D); PBD: Jul 1991

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BORON 11; NUCLEAR QUADRUPOLE RESONANCE; ALUMINIUM 27; TEMPERATURE RANGE 0000-0013 K; SQUID DEVICES; KHZ RANGE 100-1000; HAMILTONIANS; ANALYTICAL SOLUTION; BORON NITRIDES; BORIC ACID; BORON OXIDES; SAPPHIRE; PETALITE; NITROGEN; 665100; 661210; NUCLEAR TECHNIQUES IN CONDENSED MATTER PHYSICS; CRYOGENICS

Citation Formats


                    Chang, Jih -Wen. Low-frequency nuclear quadrupole resonance with a dc SQUID.  United States: N. p., 1991. 
        Web.  doi:10.2172/10147735.

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                    Chang, Jih -Wen. Low-frequency nuclear quadrupole resonance with a dc SQUID.  United States.  https://doi.org/10.2172/10147735

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                    Chang, Jih -Wen. 1991.  
        "Low-frequency nuclear quadrupole resonance with a dc SQUID".  United States.  https://doi.org/10.2172/10147735.  https://www.osti.gov/servlets/purl/10147735.

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@article{osti_10147735,

  title        = {Low-frequency nuclear quadrupole resonance with a dc SQUID},

  author       = {Chang, Jih -Wen},

  abstractNote = {Conventional pure nuclear quadrupole resonance (NQR) is a technique well suited for the study of very large quadrupolar interactions. Numerous nuclear magnetic resonance (NMR) techniques have been developed for the study of smaller quadrupolar interactions. However, there are many nuclei which have quadrupolar interactions of intermediate strength. Quadrupolar interactions in this region have traditionally been difficult or unfeasible to detect. This work describes the development and application of a SQUID NQR technique which is capable of measuring intermediate strength quadrupolar interactions, in the range of a few hundred kilohertz to several megahertz. In this technique, a dc SQUID (Superconducting QUantum Interference Device) is used to monitor the longitudinal sample magnetization, as opposed to the transverse magnetization, as a rf field is swept in frequency. This allows the detection of low-frequency nuclear quadrupole resonances over a very wide frequency range with high sensitivity. The theory of this NQR technique is discussed and a description of the dc SQUID system is given. In the following chapters, the spectrometer is discussed along with its application to the study of samples containing half-odd-integer spin quadrupolar nuclei, in particular boron-11 and aluminum-27. The feasibility of applying this NQR technique in the study of samples containing integer spin nuclei is discussed in the last chapter. 140 refs., 46 figs., 6 tabs.},

  doi          = {10.2172/10147735},

  url          = {https://www.osti.gov/biblio/10147735},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon Jul 01 00:00:00 EDT 1991},

  month        = {Mon Jul 01 00:00:00 EDT 1991}

}

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