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Low-frequency nuclear quadrupole resonance with a dc SQUID

Description: 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 applicati… more
Date: July 1, 1991
Creator: Chang, J.W.
Partner: UNT Libraries Government Documents Department
open access

Advances in high repetition rate, ultra-short, gigawatt laser systems for time-resolved spectroscopy

Description: The objective of this article is to emphasize the current advances in the development of high-repetition rate amplifier pumps. Although this review highlights amplifier pump development, any recent data from achieved outputs via the tunable amplifier section is also discussed. The first section describes desirable parameters attributable to the pump amplifier while the rest of the article deals with specific examples for various options. The pump amplifiers can be characterized into two distinc… more
Date: January 1, 1991
Creator: DiMauro, L. F.
Partner: UNT Libraries Government Documents Department
open access

Low-frequency nuclear quadrupole resonance with a dc SQUID

Description: 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 applicati… more
Date: July 1, 1991
Creator: Chang, J. W.
Partner: UNT Libraries Government Documents Department
open access

Advances in High Repetition Rate, Ultra-Short, Gigawatt Laser Systems for Time-Resolved Spectroscopy

Description: The objective of this article is to emphasize the current advances in the development of high-repetition rate amplifier pumps. Although this review highlights amplifier pump development, any recent data from achieved outputs via the tunable amplifier section is also discussed. The first section describes desirable parameters attributable to the pump amplifier while the rest of the article deals with specific examples for various options. The pump amplifiers can be characterized into two distinc… more
Date: December 31, 1991
Creator: DiMauro, Louis F.
Partner: UNT Libraries Government Documents Department
open access

Modulus dispersion and attenuation in tuff and granite

Description: The effects of loading frequency, strain amplitude, and saturation on elastic moduli and attenuation have been measured in samples of the Topopah Spring Member welded tuff. Four different laboratory techniques have been used to determine Young`s modulus and extensional wave attenuation at frequencies ranging from 10{sup {minus}2} to 10{sup 6} Hz. The results are compared with data acquired for Sierra White granite under the same conditions. The modulus and attenuation in room dry samples remain… more
Date: December 23, 1991
Creator: Haupt, R. W.; Martin, R. J., III; Tang, X.; Dupree, W. J. & Price, R. H.
Partner: UNT Libraries Government Documents Department
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