Low-frequency nuclear quadrupole resonance with a dc SQUID
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.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5258685
- Report Number(s):
- LBL-31124; ON: DE92014506
- Resource Relation:
- Other Information: Thesis (Ph.D)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Methyl quantum tunneling and nitrogen-14 NQR NMR studies using a SQUID magnetic resonance spectrometer
I: Low Frequency NMR and NQR Using a dc SQUID. II: Variable-temperature 13C CP/MAS of Organometallics
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALUMINIUM 27
NUCLEAR QUADRUPOLE RESONANCE
BORON 11
ANALYTICAL SOLUTION
BORIC ACID
BORON NITRIDES
BORON OXIDES
HAMILTONIANS
KHZ RANGE 100-1000
NITROGEN
PETALITE
SAPPHIRE
SQUID DEVICES
TEMPERATURE RANGE 0000-0013 K
ALUMINIUM ISOTOPES
BORON COMPOUNDS
BORON ISOTOPES
CHALCOGENIDES
CORUNDUM
ELECTRONIC EQUIPMENT
ELEMENTS
EQUIPMENT
FLUXMETERS
FREQUENCY RANGE
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISOTOPES
KHZ RANGE
LIGHT NUCLEI
MATHEMATICAL OPERATORS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MINERALS
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
QUANTUM OPERATORS
RESONANCE
SILICATE MINERALS
STABLE ISOTOPES
SUPERCONDUCTING DEVICES
TEMPERATURE RANGE
665100* - Nuclear Techniques in Condensed Matter Physics - (1992-)
661210 - Cryogenics- (1992-)