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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Khoo Kok Siong, Assoc. Prof. Dr. | - |
| dc.contributor.author | Islam Jobaidul (P99020) | - |
| dc.date.accessioned | 2023-10-05T06:42:49Z | - |
| dc.date.available | 2023-10-05T06:42:49Z | - |
| dc.date.issued | 2020-01-16 | - |
| dc.identifier.other | ukmvital:130583 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/475892 | - |
| dc.description | Halo nuclei have a peculiarly large volume due to their valence nucleons stay abnormally far from their cores of the nuclei. These valence nucleons are loosely bound with their cores. Therefore, the nuclei with the comparatively large volume and valence nucleons’ weak binding energies are called halo nuclei. These properties show that the 27S, 8He and 29F nuclei are considered as the halo nuclei. 27S nucleus is a proton halo nucleus, 8He and 29F nuclei are neutron halo nuclei. The most possible configurations of these three halo nuclei are 25Al + p + p and 26P + p configuration for the 27S nucleus and 4He + 2n + 2n or 6He + n + n for 8He nucleus and 27F + n + n for the 29F halo nucleus. In this present study, 27S, 8He, 29F halo nuclei properties were investigated due to the lacking of sufficient experimental data, especially for the 27S and 29F halo nuclei. The 8He nucleus was investigated due to its two halo configurations: 4He + 2n + 2n (four-neutrons halo) or 6He + n + n (two-neutrons halo). The goals of this study are to explore the halo properties such as binding energy and root mean square (RMS) matter radii calculations and nuclear density distributions investigations for the 27S, 8He, and 29F halo nuclei. Halo properties investigations for these three halo nuclei, the Jacobi coordinates system was used as the primary tool to describe the motion of the valence nucleons included in the wave function. It was also applied to the Hamiltonian of the three-body problem. Subsequently, the Gaussian-Gaussian (GG) and Gaussian- Oscillator (GO) distributions were used to study the core, RMS matter and halo density distributions for these three nuclei. In our research work, the 27S nucleus was considered as 25Al + p + p, 8He and 29F halo nuclei were also considered such as 4He + 2n + 2n and 27F + n + n (core + nucleon + nucleon) like the three-body system. For this three-body system, parameters were calculated, exploiting the Coulomb interaction, spin-orbit interaction and Woods-Saxon potential. MATLAB version 2013 computational software was also used for the calculations. Based on the experienced core deformation, the binding energy for the 27S was ranging from -1.377 to -1.387 MeV for the deformation parameters of 0.180, 0.200, 0.246, respectively. The binding energies of - 3.112 MeV, -3.416 MeV, and -3.625 MeV for the 8He nucleus were obtained for the deformation parameters of 0.35, 0.40, and 0.47, respectively. The simulated binding energies of the 29F nucleus were -1.381 MeV (Y-configuration) and -1.440 MeV (Tconfiguration) for the 0.118 core deformation. The calculated root mean square (RMS) matter radii for the 27S nucleus were 3.766 fm, 3.794 fm and 3.857 fm for β2, (0.180, 0.200 and 0.246). The RMS matter radii for the 8He were 2.032 fm, 2.305 fm, and 2.39 fm for the deformation parameters of 0.35, 0.40, and 0.47. The RMS matter radii for the 29F nucleus were 3.755 fm (Y-configuration) and 3.845 fm (T-configuration) for the core deformation of 0.118. These halo nuclei experienced the prolate core deformation due to the positive core deformation parameters. The large RMS radii and weak binding energies of the valence nucleons indicate these nuclei as the halo nuclei. For both the GG and GO distributions, in the core and RMS matter densities, almost all nucleons were distributed at the center of these nuclei. On the other hand, the halo nucleons for these three- nuclei were arranged to a huge extent. For example- the halo density tail was extended more than 8.00 fm for the halo 27S and 29F nuclei, this halo tail was also extended up to the 8.00 fm for the 8He halo nucleus. Finally, the oblate and prolate shapes were observed for the halo nuclei 27S and 29F respectively for their negative and positive core deformation parameter values of these two halo nuclei and the prolate shape was found for the 8He halo nucleus.,Sarjana Sains | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | - |
| dc.rights | UKM | - |
| dc.subject | Compound nucleus | - |
| dc.subject | Haloacid dehalogenase | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.title | Halo properties of proton halo nucleus 27S and neutron halo nuclei 8HE, 29F | - |
| dc.type | Theses | - |
| dc.format.pages | 84 | - |
| dc.identifier.callno | QC794.I835 2021 tesis | - |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
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