Ms
Lindsay Donaldson
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa)
Abstract content <br> (Max 300 words)
The decay of giant resonances in nuclei is a prime example of how a well-ordered collective excitation dissolves into a disordered motion of internal degrees of freedom in fermionic quantum many-body systems. Fine structure of the Isovector Giant Dipole Resonance (IVGDR) for the neodymium isotope chain, 142,144,146,148,150Nd, has been observed in high energy-resolution inelastic proton scattering experiments. The state-of-the-art K600 magnetic spectrometer of iThemba LABS was used to perform these experiments at zero-degrees scattering angle with an incident proton energy of 200 MeV. The analysis of the measured (p,p') energy spectra will yield insight into the transition from spherical (142Nd) to highly deformed (150Nd) nuclei and provide information about the dominant damping mechanisms. A comparison can be made to (&gamma,xn) data which clearly show a broadening and splitting of the IVGDR as deformation increases. It should be noted that other resonances are also observed at zero degrees. In particular, the Isoscalar Giant Quadrupole Resonance (ISGQR) for which comparisons can be made to data taken in a complimentary experiment at finite scattering angles. Preliminary results will be presented.
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Professor John Carter: john.carter@wits.ac.za
University of the Witwatersrand
Ms
Lindsay Donaldson
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa)
Prof.
Achim Richter
(Institut fur Kernphysik, Technische Universitat Darmstadt, D-64829, Darmstadt, Germany)
Prof.
Atsushi Tamii
(Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 560-0047, Japan)
Mr
Chamunorwa Oscar Kureba
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa)
Dr
Deon Steyn
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa)
Prof.
Elias Sideras-Haddad
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa)
Mr
Fhumulani Nemulodi
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa; Department of Physics, University of Stellenbosch, Matieland 7602, South Africa)
Dr
Frederick Smit
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa)
Prof.
Gordon Cooper
(School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa)
Dr
Hirohiko Fujita
(Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 560-0047, Japan)
Dr
Iyabo Usman
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa; iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa)
Mr
Joele Mira
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa; Department of Physics, University of Stellenbosch, Matieland 7602, South Africa)
Prof.
John Carter
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa)
Mr
Maxwell Jingo
(School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa)
Prof.
Paul Papka
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa; Department of Physics, University of Stellenbosch, Matieland 7602, South Africa)
Prof.
Peter von Neumann-Cosel
(Institut fur Kernphysik, Technische Universitat Darmstadt, D-64829, Darmstadt, Germany)
Dr
Retief Neveling
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa)
Prof.
Roger Fearick
(Physics Department, University of Cape Town, Rondebosch 7700, South Africa)
Dr
Siegfried Fortsch
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa)
Prof.
Yoshitaka Fujita
(Department of Physics, Osaka University, Ibaraki, Osaka 560-0047, Japan)
Dr
Zinhle Buthelezi
(iThemba Laboratory for Accelerator Based Sciences, Somerset West 7129, South Africa)
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