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Faculty of Sciences
Document Details
Document Type
:
Thesis
Document Title
:
Studies of vibration Effect in icons Hadral Crystals
دراسات الاثار التذبذبات في البلورات ذوات الاوجه العشرين
Subject
:
Physics
Document Language
:
Arabic
Abstract
:
The discovery of Aluminium alloys with icosahedra structures opened a new field of discussion in condensed matter theory. Earlier elemental boron is found in various modifications, -all of them with icosahedra symmetry containing twelve atoms. B12 icosahedrons also manifest itself in the borohydrides. The recent discovery of fullerenes and its various crystalline compounds have ignited enormous interest among theorists as well as experimentalists. The number of polyatomic system of icosahedra symmetry is increasing each day. In most of these cases, the ground or first excited electronic states are degenerate; and analysis of their properties demand a thorough investigation of the vibrational structures of icosahedra symmetries. The objectives of present work is to understand the icosahedra group completely. A detailed analysis of this group and the normal vibrational modes of the systems with these symmetries are presented here. The selection rules defined for the vibrational effect will help us to understand these systems better
Supervisor
:
Prof. Khursheed Athar Siddiqui
Thesis Type
:
Master Thesis
Publishing Year
:
1422 AH
2001 AD
Co-Supervisor
:
Dr. Mohammad Saeed Alahmadi
Added Date
:
Wednesday, June 11, 2008
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
لبنى محمد سندي
Sindi, Lubna Mohammad
Researcher
Master
lmsindi@kau.edu.sa
Files
File Name
Type
Description
23862.pdf
pdf
المستخلص
23863.pdf
pdf
Abstract
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