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The U center in potassium bromide crystals

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Title: The U center in potassium bromide crystals
Author(s): Rockstad, Howard Kent
Doctoral Committee Chair(s): Maurer, R. J.
Department / Program: Physics
Discipline: Physics
Degree: Ph.D.
Genre: Dissertation
Subject(s): U center U band potassium bromide crystals secondary bands exciton transitions negative ion vacancy interstitial hydride ion
Abstract: The optical bleaching of the U band in potassium bromide crystals at 78°K has been investigated. The nature of the secondary bands, the U' and the Ul bands, was studied. The U' band consisted of component bands, including the a band which is due to exciton transitions near a negative ion vacancy. One component of the U' band is bleached readily in either of two ways: either by warming the crystal to lo6°K or by irradiating with monochromatic light in the Ul band. This component of the ut band was interpreted as due to exciton transitions near a negative ion vacancy perturbed by the proximity of a Ul center, that is, an interstitial hydride ion. The spectral distribution of quantum efficiency for conversion of U centers to negative ion vacancies at 78°K was measured and found to decrease by 4~ on the high energy side of the U band. The U band has a high energy shoulder and it is suggested that this high energy shoulder exhibits a lower quantum efficiency for the conversion than does the main U band.
Issue Date: 1964
Genre: Dissertation / Thesis
Type: Text
Language: English
URI: http://hdl.handle.net/2142/23958
Rights Information: 1964 Howard Kent Rockstad
Date Available in IDEALS: 2011-05-19
Identifier in Online Catalog: 6141334
 

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