حسابات عوامل التشكل النووية للاستطارة الالكترونية مع انموذج الفضاء الموسع sdpf لبعض النوى الخفيفة == Electron Scattering Form Factors Calculations with Extended sdpf Model Space for Some Light Nuclei
Author name:
شامل راضي صاحب
Supervisor name:
خالد صالح جاسم
General topic:
Physics
Specific topic:
Electronics Physics
Degree:
Master
University:
University of Babylon - College Of Education For Pure Sciences - Physics Department
Language:
English
University location:
Babylon
First pages:
26T1650 - p.pdf
Abstract:
The energy levels of 17,18O, 19F, 20Ne, 25,26Mg and 27Al nuclei have been calculated with the extended sdpf - model space . The calculations are performed with sdpfnow as effective interaction. There is good agreement between theoretical and experimental levels for most states. This study confirmed many levels in the 25,26Mg and 27Al nuclei Theoretically. Nuclear structure of the above nuclei except 26Mg have been studied by the elastic and inelastic electron scattering to calculate the form factors and reduced transition probabilities over the momentum transfer range (0 ≤q≤3) fm^( - 1). The wave functions for this nucleus have been utilized from the shell model using sdpfnow as a two - body effective interaction. The wave functions of the single - particle matrix elements were calculated by the Harmonic Oscillator (HO) and Skyrme (SK) potentials. The charge density distribution was calculated using the HO, Woods - Saxon (WS) and SK potentials for the 18O, 19F and 20Ne nucleus.The Core - polarization (CP) effects are used by adopting the shape of the Tassie - Model (TM) and effective charges, the effective charges employed for all states are 0.35 for each of proton and neutron except for 17,18O are 0.65.Two shell model codes NuShellX@MSU and NuShell@MSU for windows have been used in this study. The form factors for most nuclei under consideration give a good agreements compared with the experimental data. The calculations of effective charge model give a good agreement in the first maximum of momentum transfer regions (q) in all the nucleus except 17,18O, where it failed in describing the longitudinal form factors. The CP effects with TM give a good agreement for the two maximum of momentum transfer regions and it is better than the effective charge model for all the nuclei except C2〖(1/2〗_1^+ 1⁄(2)) state in the 27Al nucleus, where the effective charge model seems to agree more with the experimental data compared with TM.Transverse magnetic form factors calculations of 〖3/2〗_1^+ 1/2 state in the 19F nucleus are performed by adjusting the g - factors to be 8.2, - 2.1 for the proton and neutron, respectively, calculations of the 〖9/2〗_1^+ 1/2 state in the 19F nucleus also performed by adjusting the g - factors to be 6.58, - 2.82 for the proton and neutron, respectively. The comparison between fp and sdpf - models space have been performed with fpd6 and sdpfnow effective interactions, respectively, for the 54Cr and 54,56Fe nucleus
