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Elastic scattering and inelastic excitation of the second, unbound, state 9Be (5/2ˉ, 2.43 MeV) for the identical-particle fermionic system 9Be + 9Be have been measured at the highest incident beam energy presently available ELab(9Be) = 25 MeV. A 9Be beam, produced by the General Ionex Corporation model 860C sputter ion-source, was accelerated by the EN Tandem Van de Graaff accelerator of the iThemba LABS (Gauteng) and was used to bombard a thin 9Be target. The experimental equipment associated with the C-line includes a high resolution ΔE-E gas-ionisation detector coupled to a small scattering chamber. Energy loss and residual energy signals were processed using a CAMAC-based plus OS/2 WIMPS2 data acquisition system running on an online computer. The ΔE-E plots were used to identify the reaction products and their kinematic energies, thereby determining the elastic and inelastic scattering cross-sections. The elastic and inelastic scattering data were analysed in terms of the optical model and Distorted Wave Born Approximation, respectively. Angular distribution data for the elastic scattering for 9Be + 9Be conformed well to the optical model predictions using an energy-independent optical model potential. Inelastic scattering cross-sections were determined up to θc.m.  135° and symmetry effects were investigated. As such, excitation of the second, unbound, state 9Be (5/2ˉ, 2.43 MeV) via a strong E2 one-step two-body interaction from the 9Be (3/2ˉ, g.s.) did not show effects due to symmetry in the entrance channel. These results were consistent with a previous study at ELab(9Be) = 16 MeV.

Typescript (photocopy) / 94 leaves : Ill., graphs, tables ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.) Dept. of Mathematical Physics, University of Adelaide, 1981

Leang Po Shan = 利用飛行時間散射反衝符號測量譜儀研究LiTaO3(001)單晶之表面電荷動態特性 / 梁寶珊. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2003. / Includes bibliographical references (leaves 50-51). / Text in English; abstracts in English and Chinese. / Leang Po Shan = Li yong fei xing shi jian san she fan chong fu hao ce liang pu yi yan jiu LiTaO3(001) dan jing zhi biao mian dian he dong tai te xing / Liang Baoshan. / Chapter 1 --- Introduction --- p.1 / Chapter 1.1 --- Ferroelectricity and pyroelectricity of LiTαO3 --- p.1 / Chapter 1.2 --- Surface Studies of Ferroelectrics --- p.5 / Chapter 1.2.1 --- Size Effect and Importantce of Surface Properties --- p.5 / Chapter 1.2.2 --- General Difficulties in Surface Studies of Ferroelectrics --- p.5 / Chapter 1.2.3 --- Applicability of TOF-SARS in the Analysis of Ferro- electrics --- p.6 / Chapter 1.3 --- Surface Charge Dynamics on Ferroelectrics --- p.7 / Chapter 1.3.1 --- Surface Charge Screening of Spontaneous Polarization --- p.7 / Chapter 1.3.2 --- Discharge of Excessive Surface Charge --- p.7 / Chapter 1.4 --- Objectives of the Thesis Work: TOF-SARS Study of Surface Charge Dynamics of LiTαO3 --- p.11 / Chapter 2 --- Ion-Surface Interaction --- p.13 / Chapter 3 --- Time-of-Flight (TOF) Ion Scattering and Recoiling Spectrom- eter --- p.17 / Chapter 3.1 --- TOF Ion Scattering and Recoiling Spectrometer --- p.18 / Chapter 3.2 --- Ion Column --- p.19 / Chapter 3.2.1 --- Ion Source --- p.19 / Chapter 3.2.2 --- Pulsing System --- p.19 / Chapter 3.2.3 --- ExB Wien Filter Mass Analyzer --- p.20 / Chapter 3.2.4 --- Einzel Lens --- p.20 / Chapter 3.2.5 --- Neutral Beam Trap --- p.20 / Chapter 3.2.6 --- Vacuum Chamber and Manipulator --- p.20 / Chapter 3.3 --- Variable Angle Detector --- p.23 / Chapter 3.3.1 --- Setup --- p.23 / Chapter 3.3.2 --- Beam Alignment --- p.24 / Chapter 4 --- Results and Analysis --- p.25 / Chapter 5 --- Study of Charge Relaxation Process --- p.35 / Chapter 5.1 --- Derivation of Surface Electric Potential --- p.35 / Chapter 5.2 --- Data Analysis --- p.40 / Chapter 6 --- Conclusion --- p.49 / Bibliography --- p.50