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Multipole mixing ratios of transitions out of high spin gamma vibrational states in neutron rich Mo, Ru isotopes
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Multipole mixing ratios of transitions out of high spin gamma vibrational states in neutron rich Mo, Ru isotopes
| Title: | Multipole mixing ratios of transitions out of high spin gamma vibrational states in neutron rich Mo, Ru isotopes |
| Author: | Fenker, Benjamin |
| Abstract: | Current models of nuclear structure describe nuclear states in terms of collective vibrations and rotations of a ground state. - One such quadrupole vibrational band is the gamma-band formed by vibrations of the short sides of a deformed nucleus. - When a nucleus that is in this mode decays to its ground state, the electromagnetic radiation is predicted to be entirely quadrupole in nature. - This prediction has been well documented in a wide range of nuclei. - However, a recent study of neutron rich molybdenum and ruthenium isotopes found a few gamma-band to ground-band transitions that contained almost no quadrupole radiation. - This work utilizes the Gammasphere detector array to examine the angular correlations in the de-excitations of the secondary fission fragments of 252Cf in order to make independent measurements of these results. - This work also uses the same technique to measure the multipole mixing ratios of gamma-band to ground-band transitions originating in states with spin-parity as high as 9+. - The results demonstrate that in these nuclei, electric quadrupole radiation is strongly favored in gamma to ground band transitions as has been predicted by theory. |
| Description: | Highest Honors in Physics |
| Subject: |
Nuclear deformation
Neutron-rich Multipole mixing ratios High spin Gamma vibrational states Mo, Ru isotopes |
| LCSH Subject: |
Spontaneous fission
Angular correlations (Nuclear physics) Nuclear structures Nuclear shapes Molybdenum -- Isotopes Ruthenium -- Isotopes |
| URI: | http://hdl.handle.net/1803/4106 |
| Date: | 2010-04-27 |
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| ben_thesis.pdf | 379.9Kb |
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