Microscopic description of isoscalar giant resonance excitations in ⁴⁰Ca and ¹¹⁶SN nuclei /
This thesis presents a microscopic description of isoscalar giant resonance excitations in ⁴⁰Ca and ¹¹⁶ Sn nuclei within the self-consistent Skyrme-Hartree-Fock-Random-Phase-Approximation (HF-RPA) theory. Such characteristic features of the Isoscalar Giant Resonance as strength function, transition...
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
2000.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | This thesis presents a microscopic description of isoscalar giant resonance excitations in ⁴⁰Ca and ¹¹⁶ Sn nuclei within the self-consistent Skyrme-Hartree-Fock-Random-Phase-Approximation (HF-RPA) theory. Such characteristic features of the Isoscalar Giant Resonance as strength function, transition density and cross-sections for ⁴⁰Ca and ¹¹⁶Sn nuclei are obtained. In this analysis, the SL1 Skyrme interaction associated with 230 MeV for the value of nuclear matter incompressibility coefficient K is chosen. The selection of nuclei is based on the availability of recent experimental results from Texas A&M University. The coordinate space formulation of the RPA in terms of Green's function is employed to obtain isoscalar monopole and dipole transition strength distributions for ⁴⁰Ca and ¹¹⁶Sn nuclei. Calculations are performed with the discretized single-particle continuum. Theoretical transition strength distributions are used to find quantities of interest such as energy positions of resonance states, sum rules and average resonance energies. The cross-section of 240 MeV α-particle scattering on the above nuclei are analysed within the Distorted Wave Born Approximation (DWBA) using transition densities obtained from the HF-RPA calculations. From this analysis the cross-sections for ISGDR excitations are obtained and compared with the recent experimental data obtained at the Cyclotron Institute, Texas A&M University. |
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| Item Description: | "Major subject: Physics". Vita. |
| Physical Description: | viii, 36 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references (leaves 28-29). |