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Experimental Techniques for Rare Isotope Beam Experiments, and a Study of the Breakout from the Hot CNO-Cycle Through the 19Ne(P,γ)20Na Reaction

Title: Experimental Techniques for Rare Isotope Beam Experiments, and a Study of the Breakout from the Hot CNO-Cycle Through the 19Ne(P,γ)20Na Reaction.
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Name(s): Belarge, Joseph, author
Wiedenhöver, Ingo, 1966-
Plewa, Tomasz, university representative
Volya, Alexander, committee member
Cottle, Paul D. (Paul Davis), committee member
Bonesteel, N. E., committee member
Florida State University, degree granting institution
College of Arts and Sciences, degree granting college
Department of Physics, degree granting department
Type of Resource: text
Genre: Text
Issuance: monographic
Date Issued: 2015
Publisher: Florida State University
Place of Publication: Tallahassee, Florida
Physical Form: computer
online resource
Extent: 1 online resource (98 pages)
Language(s): English
Abstract/Description: The study of exotic nuclei, and their implication for Astrophysics have become a driving force in low-energy nuclear science, nationally recognized by the construction of the Facility for Rare Isotope Beams (FRIB) laboratory. To maximize the potential provided by beams of exotic nuclei, novel detector systems and analysis techniques must be developed, a current focus of the Florida State University (FSU) group. Experimental results from commissioning experiments with the ANASEN and RESONEUT detectors at FSU are presented. The neutron deficient ⁹C nucleus was studied through the ⁸B+p resonant elastic scattering reaction. The experiment was conducted during the commissioning of the ANASEN detector in 2012. Due to cryogenics problems, the experiment was stopped prematurely. Through analysis of the partial data set, it was shown that a full analysis could be performed, on complete data sets, for future proton resonance elastic scattering experiments. Results from the ¹⁹O(d,p)²⁰O experiment, also conducted as a part of the commissioning of the ANASEN detector at FSU, will be presented. It was found that heavy ion recoils from the (d,p) reactions were reaching the active zone of the proportional counter, and subsequently producing UV-light radiation that degraded the proportional counter performance. This discovery lead to a re-design of the proportional counter, which is currently being constructed by the ANASEN group at Louisiana State University. An experimental study of low-lying proton resonances in ²⁰Na was performed using the proton transfer ¹⁹Ne(d,n)²⁰Na(p) reaction as part of the commissioning campaign of experiments with the RESONEUT detector. This reaction is comparable to the direct proton capture, ¹⁹Ne(p,ɣ)²⁰Na, which is of astrophysical significance in the breakout from the Hot CNO-cycle. Using protons detected from the decay of ²⁰Na, three resonances were observed, at energies of 0.44 MeV, 0.66 MeV, and 0.82 MeV above the proton threshold. The resonance strengths were determined, and the subsequent ¹⁹Ne(p,ɣ)²⁰Na stellar reaction rate was calculated. A discussion of this reaction rate in the context of the breakout from the Hot CNO-cycle is presented.
Identifier: FSU_2015fall_Belarge_fsu_0071E_12826 (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: Fall Semester 2015.
Date of Defense: August 12, 2015.
Bibliography Note: Includes bibliographical references.
Advisory Committee: Ingo Wiedenhöver, Professor Directing Dissertation; Tomasz Plewa, University Representative; Alexander Volya, Committee Member; Paul Cottle, Committee Member; Nicholas Bonesteel, Committee Member.
Subject(s): Nuclear physics
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_2015fall_Belarge_fsu_0071E_12826
Host Institution: FSU

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Belarge, J., & Wiedenhöver, I. (2015). Experimental Techniques for Rare Isotope Beam Experiments, and a Study of the Breakout from the Hot CNO-Cycle Through the 19Ne(P,γ)20Na Reaction. Retrieved from http://purl.flvc.org/fsu/fd/FSU_2015fall_Belarge_fsu_0071E_12826