Shape coexistence in germanium and selenium isotopes using covariant density functional theory

العناوين الأخرى

التواجد الثنائي في نظائر الجرمانيوم و السلينيوم باستخدام نظرية كثافة الدالة

مقدم أطروحة جامعية

Abu Awwad, Nihad Jamal

مشرف أطروحة جامعية

Abu Sarah, Hazim

الجامعة

جامعة بيرزيت

الكلية

كلية العلوم

القسم الأكاديمي

دائرة الفيزياء

دولة الجامعة

فلسطين (الضفة الغربية)

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2018

الملخص الإنجليزي

Shape coexistence, shape evolution, and ground state properties such as; bind- ing energy, two neutron separation energy, proton and neutron radii in the Ge and Se isotopic chains are studied within the frame work of relativistic-Hartree- Bogoliubov using density-dependent zero and nite range, and non-linear NN interactions.

A systematic investigation of the ground state shape is performed for Ge isotopes (Z = 32, 34 N 62) and Se isotopes (Z = 34, 34 N 62).

The ground state shape is found to be both oblate and prolate 66Ge and spherical and oblate for 72Ge.

The rest of the isotopic chain has only one minimum and in some ceases it is found to be triaxial.

A sudden change in the nuclear shape is observed for 70;72;74Ge isotopes.

For the Se isotopes the existing of two di erent shapes in the ground state is better seen as compared with Ge isotopes.

It is clearly seen at the neutron rich side of the isotopic chain, and in the neutron de cient side of the chain one can see oblate- prolate and prolate-spherical shape transition.

Our calculations is independent of the choice of parametrization, as we get similar results with both NL3*, and DD-PC1.

The physical properties: Binding energy, two neutron energy, neutron, proton, and charge radii are studied as a function of mass number or neutron number.

In general a smooth change in these properties is found, except near N = 50 one can see a sharp change, which reect the sudden change in the ground state deformation in the neighboring nuclei.

Our calculations shows a reasonable agreement with experimental data, and the results obtained with IBM based on Gogny density functional with D1M force.

التخصصات الرئيسية

الفيزياء

الموضوعات

• النظائر المشعة
• السيلينيوم
• الجرمانيوم
• نظرية الكثافة الوظيفية

عدد الصفحات

74

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-837073