Nuclear Physics and its peaceful applications. Presented by Dr Hoda AbouǦShady

Transcription

1 Nuclear Physics and its peaceful applications Presented by Dr Hoda AbouǦShady

2 CairoUniversity Homeinstitute DepartmentofPhysics FacultyofScience CairoUniversity Myhomeinstitute

3 Themesofresearch innuclearphysics Venus Mars Theoretical nuclearphysics Saturn Experimental nuclearphysics Nuclearengineering

4 Theoreticalnuclearphysics MainResearchinterest:DeformedNuclei MainResearchcalculations: ReactionCross section Fusioncross section Differentialcross section Variationwith different deformationand orientation Max Min Avover all orientation Variationwith deformationand orientation Variationofbarrier parameters Barrierdistribution Averageoverall Orientation Glaubertheory Eikonal approximation Comparisonwith othertheoretical models Halonuclei

5 Cross sections? To characterize the probability that a particular nuclear reaction will take place, or the statistical nature of scattering events

6 The total reaction cross section within the optical model calculation, is defined as the total cross section T minus the elastic el cross section for nucleus-nucleus reactions: 0 R (, ˆ ) 2 {1 Exp[ i( b, ) ]} bdb, are the symmetry axis direction and the target nucleus deformation parameters (b, ) is the profile function defined '( b, ˆ ) dz T ( r, ˆ ) p E L r R, d r NN T p A P T and P are the densities of the target and projectile and R is the separation distance between their centers and E L /A p is the incident energy per projectile nucleon in the lab system and nn is the nucleon nucleon cross section.

7 The deformed target density distribution is given by Where R is the half density radius Where 2, 4 and 6 account for quadrupole, hexadecapole and hexacontatetrapole deformation parameters as shown in the upcoming figures a R r o T e r ) ( 1 1 ) ˆ, ( )] ( ) ( ) ( [1 ) ( o o o o o Y Y Y R R

8 TheactualshapeoftheLithium7 nucleus 4 = = 0 4 = = = 0.4

9 Typesofdeformation

10 Quadrupole (2=>4moment) Hexadecapole (4=>16moment) Hexacontatetrapole (=6=>64moment)

11 Schematic representation of the collision between deformed target and spherical projectile nuclei, R is in the x-z plane rr Xaxis b R r Zaxis Yaxis

12 PartofPublications Translation of Volume IV of L université de tous les savoirs, part "des particules a l antimatière : la matière et son organization " from French to Arabic for the supreme council of culture and the French cultural center in Egypt 2007 Study of Coulomb force for two diffuse spherical deformed nuclei, Physics of Atomic Nuclei 2006, Vol. 69, No. 9, pp , M. Y. Ismail, Ahmed Bakri, W. Seif, H. AbouShady Optical fiber instability during coating process; journal of fluid and structure 22 (2006), pp M. Hamadich, H. AbouShady Geometric Interpretation of the reaction cross section for DeformedSpherical interacting pair, the Egyptian journal of physics vol 37, no2 p171182(2006), M. Y. Ismail, H. Aboushady, H. El Gebaly, A. Ellithi. Effect of finite range NN force and NN cross section on reaction cross section for neutron rich nuclei. Physical review C71 (2005) M. Y. Ismail, A. Ellithi, H. AbouShady. Effect of 6 deformation parameter on fusion crosssection and barrier distribution, Acta Phys. Hung. A21 (2004) 27 38, Ismail; M.M. Osman; H. El Gebaly ; H. Abou Shady. Calculation of the reaction cross section of the C 12 +N 17 using relativistic heavy ion potential single author, Egyptian Journal of Physics, Vol. 25 June 2004, H. Abou Shady Orientation and deformation dependence of the reaction crosssection for a deformed target nucleus, Modern physics letters vol.18 no.1 (2003), Ismail; M.M. Osman; H. El Gebaly; H. AbouShady

13 Experimentalnuclearphysics Egyptianatomicenergyauthority GraduatecoursesinEgyptianuniversitiesonly

14 Arewepreparedforanuclearpowerplant? Nuclearengineering(1university,noexperimentation) Nuclearcourses(needsrenovation) Publicrecognition(urbanmyths)

15 Centerofexcellencefornucleargraduatestudiesand itspeacefulapplication 1) Incubatorforyoungresearchersandgraduate students 2) Providebasiccoursesfornuclearengineers 3) Fissionandfusioninaction 4) Nuclearpharmaceuticals 5) Desalinationandhealthphysics 6) Neutronactivationanalysis

16 Sharingknowledge France Italy ICTP IAEA Startingfromscratch Korea India Pakistan

17 Cycleofexcellence excellent Graduate Renovative Professor Innovative Researcher

18 Thankyou TheRhindPapyrus2000B.C