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Γ-Ray Spectroscopic Study of Calcium-48,49 and Scandium-50 Focusing on Low Lying Octupole Vibration Excitations
| Title: | Γ-Ray Spectroscopic Study of Calcium-48,49 and Scandium-50 Focusing on Low Lying Octupole Vibration Excitations. |
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| Name(s): |
McPherson, David M. (David Marc), author Cottle, Paul D. (Paul Davis), professor directing dissertation Kercheval, Alec N., university representative Cao, Jianming, 1962-, committee member Piekarewicz, Jorge, committee member Riley, Mark A., committee member Florida State University, degree granting institution College of Arts and Sciences, degree granting college Department of Physics, degree granting department |
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| Type of Resource: | text | |
| Genre: | Text | |
| Issuance: | monographic | |
| Date Issued: | 2015 | |
| Publisher: |
Florida State University Florida State University |
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| Place of Publication: | Tallahassee, Florida | |
| Physical Form: |
computer online resource |
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| Extent: | 1 online resource (80 pages) | |
| Language(s): | English | |
| Abstract/Description: | An inverse kinematic proton scattering experiment was performed at the National Superconducting Cyclotron Laboratory (NSCL) using the GRETINA-S800 detector system in conjunction with the Ursinus College liquid hydrogen target. $\gamma$-ray yields from the experiment were determined using geant4 simulations, generating state population cross sections. These cross sections were used to extract the delta_3 deformation length for the low-lying octupole vibration excitations in Ca-48,49 using the coupled channels analysis code fresco. Particle-core coupling in Ca-49 was studied in comparison to Ca-48 through determination of the neutron and proton deformation lengths. The total inverse kinematic proton scattering deformation lengths were evaluated for the low-lying octupole vibration excitations in Ca-48,49 to be delta_3(Ca-48, 3^-_1) = 1.0(2)fm, delta_3(Ca-49, 9/2^+_1) = 1.2(1)fm, delta_3 (Ca-49, 9/2^+_1) = 1.5(2)fm, delta_3(Ca-49, 5/2^+_1) = 1.1(1)fm. Proton and neutron deformation lengths for two of these octupole states were also determined to be delta_p(Ca-48, 3^-_1) = 0.9(1)fm, delta_p (Ca-49, 9/2^+_1) = 1.0(1)fm, delta_n(Ca-48, 3^-_1) = 1.1(3)fm, and delta_n(Ca-49, 9/2^+_1) = 1.3(3)fm. Additionally, the ratios of the neutron to proton transition matrix elements were also determined for these two states to be M_n/M_p(Ca-48, 3^-_1) = 1.7(6) and M_n/M_p(Ca-49, 9/2^+_1) = 2.0(5). Statistically, the derived values for these two nuclei are nearly identical. | |
| Identifier: | FSU_migr_etd-9650 (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 2015. | |
| Date of Defense: | July 8, 2015. | |
| Keywords: | deformation, deformation length, nuclear, octupole, vibration, γ-ray spectroscopy | |
| Bibliography Note: | Includes bibliographical references. | |
| Advisory Committee: | Paul Cottle, Professor Directing Dissertation; Alec Kercheval, University Representative; Jianming Cao, Committee Member; Jorge Piekarewicz, Committee Member; Mark Riley, Committee Member. | |
| Subject(s): |
Nuclear physics Physics |
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| Persistent Link to This Record: | http://purl.flvc.org/fsu/fd/FSU_migr_etd-9650 | |
| Use and Reproduction: | This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). The copyright in theses and dissertations completed at Florida State University is held by the students who author them. | |
| Host Institution: | FSU |
McPherson, D. M. (D. M. ). (2015). Γ-Ray Spectroscopic Study of Calcium-48,49 and Scandium-50 Focusing on Low Lying Octupole Vibration Excitations. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-9650
