In this thesis, the excited states ³³P were populated by the ¹⁸O+¹⁸O reaction at E[subscript lab]=24 MeV. The GAMMASPEHRE array
was used along with the Microball particle detector array to detect γ transitions in coincidence with the charged particles emitted from the
compound nucleus ³⁶S. The use of Microball enabled the selection of the proton emission channel. It also helped in determining the position and
energy of the emitted proton; which eventually helped in calculating more precise direction of the recoils to achieve better Doppler
corrections. 16 new transitions and 13 new states were observed in ³³P for the first time. The nearly 4π geometry of GAMMASPEHRE allowed the
measurement of γ-ray angular distributions leading to spin suggestions for many states. In a separate experiment conducted at the John D. Fox
laboratory in Florida State University, the higher-spin structure of ³⁸Cl (N = 21) was investigated following the ²⁶Mg(¹⁴C, pn) reaction at 30
and 37 MeV. The outgoing protons were detected in an E ‒ ΔE Si telescope placed at 0° close to the target with a Ta beam stopper between the
target and telescope. Multiple γ rays were detected in time coincidence with the protons using an enhanced version of the FSU γ detection array.
A total of 11 new γ transitions and 6 new states were reported for the first time. DCO ratio analysis and measurement of polarization asymmetry
for the emitted γ transitions were performed to assign spins and parities to a number of states. The level scheme was extended up to 8420 keV
with a likely spin of 10 ħ. A new empirical shell model interaction was developed in the spsdfp model space. This FSU interaction was built by
fitting to the energies of 270 experimental states from ¹³C to ⁵¹Ti. Calculations using the FSU interaction reproduced observed energy states of
³³P and ³⁸Cl rather well, including other spectroscopic properties. The interaction has been used to predict the intruder states of other
sd-shell nuclei, along with the configurations of the nuclei belong to the Island of Inversion region of the nuclear landscape. / A Dissertation submitted to the Department of Physics in partial fulfillment of the requirements for the degree of Doctor of Philosophy. / Summer Semester 2019. / May 7, 2019. / Higher spin, Intruder states, Nuclear Structure, particle hole excitation, Shell evolution, Shell model / Includes bibliographical references. / Samuel Tabor, Professor Co-Directing Dissertation; Vandana Tripathi, Professor Co-Directing Dissertation; Thomas Albrecht-Schmitt, University Representative; Alexander Volya, Committee Member; Laura Reina, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_722994 |
| Contributors | Lubna, Rebeka Sultana (author), Tabor, Samuel L. (professor co-directing dissertation), Tripathi, Vandana (professor co-directing dissertation), Albrecht-Schmitt, Thomas E. (university representative), Volya, Alexander (committee member), Reina, Laura (committee member), Florida State University (degree granting institution), College of Arts and Sciences (degree granting college), Department of Physics (degree granting departmentdgg) |
| Publisher | Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text, doctoral thesis |
| Format | 1 online resource (208 pages), computer, application/pdf |
Page generated in 0.0021 seconds