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Angular Momentum Induced Shape Changes in the Rare-Earth Nuclei ¹⁵²,¹⁵³Gd and ¹⁵⁹,¹⁶⁰Yb

Title: Angular Momentum Induced Shape Changes in the Rare-Earth Nuclei ¹⁵²,¹⁵³Gd and ¹⁵⁹,¹⁶⁰Yb.
Name(s): Campbell, David B., author
Riley, Mark A., professor directing dissertation
Steinbock, Oliver, outside committee member
Weidenhover, Ingo, committee member
Coa, Jianming, committee member
Piekarewicz, Jorge, committee member
Department of Physics, degree granting department
Florida State University, degree granting institution
Type of Resource: text
Genre: Text
Issuance: monographic
Date Issued: 2004
Publisher: Florida State University
Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The technique of studying nuclear structure under the rigors of high angular momentum through the examination of γ-ray cascades has recently undergone an explosion in productivity. These advances have been brought on primarily by the development of new detection systems, such as GAMMASPHERE, which are comprised of numerous individual elements. When these Compton-suppressed Ge detectors are operated in unison, a remarkable ability to distinguish weak and exotic changes in structure emerges. The current generation of spectrometers have allowed dramatic insight into the nucleus and are eclipsed only by the promises of arrays currently on the horizon. The fundamentals of employing γ-ray spectroscopic techniques to examine the fascinating behavior of rapidly rotating nuclei using these arrays will be discussed. The rare earth region of the nuclear landscape is a significant expanse of heavy nuclei with varying degrees of shell occupation. The region has proven to be a rich environment for studying nuclear structure at high spin. For example, superdeformation, identical bands, and backbending were all discovered in this region. This work explores the advances made on four nuclei from this region: 152,153Gd and 159,160Yb. Extensive additions to the previously known structure were made for each nucleus, exposing an unexpected similarity between 152Gd and 154Dy. Long sought after evidence of an angular momentum induced change in nuclear shape was found for each of the nuclei. This shift, from prolate collective rotation at low spin to oblate single particle behavior at high spin, represents a dramatic change in the method employed by the nucleus to generate angular momentum.
Identifier: FSU_migr_etd-4512 (IID)
Submitted Note: A Dissertation submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Degree Awarded: Summer Semester, 2004.
Date of Defense: June 16, 2004.
Keywords: Gamma Ray, Nuclear Structure, Rare Earth
Bibliography Note: Includes bibliographical references.
Advisory Committee: Mark A. Riley, Professor Directing Dissertation; Oliver Steinbock, Outside Committee Member; Ingo Weidenhover, Committee Member; Jianming Coa, Committee Member; Jorge Piekarewicz, Committee Member.
Subject(s): Physics
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Host Institution: FSU

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Campbell, D. B. (2004). Angular Momentum Induced Shape Changes in the Rare-Earth Nuclei ¹⁵²,¹⁵³Gd and ¹⁵⁹,¹⁶⁰Yb. Retrieved from