Speaker
Mr
Sunday Olorunfunmi
(School of Physics, University of the Witwatersrand, Johannesburg.)
Description
Previous studies have shown that fine structure in the excitation energy spectra of nuclear giant resonances can be attributed to different physical processes. For example, characteristic energy scales of the fine structure for the IsoScalar Giant Quadrupole Resonance (ISGQR) arise mainly from the collective coupling of the ISGQR to low-lying surface vibrations, while on the other hand it has been shown that Landau damping is the main mechanism leading to the fine structure phenomenon in the IsoVector Giant Dipole Resonance (IVGDR). It is important to determine which processes are responsible for the fine structure in the ISGMR, particularly in the 40,42,44,48Ca isotope chain with its systematic increase in neutron number. Moreover, study of the ISGMR is of special significance because knowledge of its excitation energy provides direct information on nuclear incompressibility. Experiments were performed using the Separated Sector Cyclotron of iThemba LABS, together with the K600 magnetic spectrometer using inelastic scattering of 200 MeV alpha particles at zero degrees from 40,42,44,48Ca for measurements in the region of ISGMR with a good energy resolution of 86 keV (FWHM). In addition, following the application of Autocorrelation analysis, J п = 0+ level densities can be extracted also. Preliminary results will be presented.
Supervisor details<br><b>If not a student, type N/A.</b><br>Student abstract submision<br>requires supervisor permission:<br>please give their name,<br> institution and email address.
Dr. Usman Iyabo, Iyabo.Usman@wits.ac.za. School of Physics, University of the Witwatersrand, Johannesburg. iyabo.usman@wits.ac.za
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| Consideration for<br>student awards<br><b>Choose one option<br>from those below.</b><br>N/A<br>Hons<br>MSc<br>PhD | PhD |
Primary authors
Ms
Chane Moodley
(School of Physics, University of the Witwatersrand, Johannesburg.)
Prof.
ELIAS SIDERAS-HADDAD
(University of the Witwatersrand)
Dr
Frederick David Smit
(iThemba LABS)
Ms
Harshna Jivan
(University of the Witwatersrand)
Dr
Hiro Fujita
(RCNP Osakka)
Dr
Iyabo Usman
(University of the Witwatersrand, Johannesburg.)
Mr
J Brummer
(Stellenbosch University, iThemba LABS)
Prof.
John Carter
(School of Physics, University of the Witwatersrand, Johannesburg)
Mr
Kelvin Li
(Stellenbosch University, iThemba LABS)
Dr
Lindsay Donaldson
(iThemba Laboratory for Accelerator Based Sciences)
Dr
Luna Pellegri
(University of Witwatersrand and iThemba LABs)
Dr
N Pietralla
(TU Darmstadt)
Dr
Paul Papka
(Stellenbosch University)
Prof.
Peter von Neumann-Cosel
(TU Darmstadt)
Dr
Philip Adsley
(University of Stellenbosch/iThemba LABS)
Dr
Retief Neveling
(iThemba LABS)
Mr
Sunday Olorunfunmi
(School of Physics, University of the Witwatersrand, Johannesburg.)
Ms
Topsy Phelady
(School of Physics, Universiy of the Witersrand / iThemba LABS)
Prof.
Y Fujita
(University of Osaka)
